A visit from the PM

Tomorrow our business will be receiving a visit from the Rt Hon MP for Richmond and Prime Minister of the UK, noted diminutive Rishi Sunak. We are told that after the initial tour of the factory, we can ask un-vetted questions. I’ve spent the last week trying to think of a single question that has a reasonable chance of actually being answered, and I don’t think I’m doing so well. Here is a non-exhaustive list of what I’ve come up with:

  • What’s the plan for economic growth in the face of a swiftly falling population? Birth rate in the UK is at less than 1.6 and still falling.

  • Two of your biggest success were arguably the Windsor Framework and your deal with Albania. Both were examples of quiet competency, diplomacy, and compromise. Why then do you waste time on divisive, noisy policies like your Rwanda legislation, which will never work as an effective deterrent?

  • In 2022 you lost 485 councillors at the local elections, and in 2023 you lost another 1063. How many councillors can you predict to lose in May’s local elections?

  • When and where is the Square One you say Labour will return us to?

    • Is it before Liz Truss put another £500 per month on the average mortgage?

    • Is it a time when you get NHS care in a timely manner?

    • Is it a time when the Education System was respectably funded?

    • Is it a time before post truth populism gripped the Conservative Party?

    • Is it a time before we were changing Prime Ministers every year or two?

  • If the Treasury has the confidence to brief out a potential suite of £20B tax cuts, when can our International Aid Budget return to 0.7% of GDP?

  • Given the world is becoming more unstable and only getting worse, why has Army recruitment failed to hit its goals every year since 2010, and what is being done about it?

  • Was it wise to grant such dubious resignation honours for disgraced former Prime Ministers Boris Johnson and Liz Truss? Do they not cheapen honours bestowed upon regular people for lifetimes of public service?

I’m not sure any of these would get a straight answer, but tomorrow I’ve got to pick at least one. We’ll see how it goes.

Project HoHoHo22 - The Beginning

As is now customary in the Pie Household, it’s time for me to decorate our windows with a festive silhouette design. This year I’ve decided on a simpler design than last, mainly to keep the cutting time down to something reasonable. Last year’s design probably took 40 hours all told, and that’s a bit much. This year it’s all about the hometown, with some iconic views that most tourist will recognise.

York Minster, as seen from Minster Gates

York Minster, as seen from Minster Gates

The Shambles, as seen looking towards Stonebow

The Shambles, as seen looking towards Stonebow

The two designs go one the two windows on the front of the house, and they’ll end up being cut and carved somewhat to make sure the important details don’t get lost between window frames. Initial cutting out of the panels is all done - next is the process of moving the designs onto the paper and cutting out the backgrounds.

People willing to tolerate Twitter can find a process thread at #HoHoHo22

Project Paperless

A long time ago, I was posting regularly here. There was a time when I even had ambitions of writing a series of posts about paperless working.

Well.

Now is the time. As part of an investor buyout in my company, paperless is officially on the agenda, and I am being asked to make recommendations to the new board.

Part of the problem of writing regularly has been that of lack of ideas and motivation. It’s easy to think “I shall write about area X or Y” but trying to gather the disparate threads of my monkey brain into coherent (and hopefully interesting) words is tough. Too tough, when alternatives are things like annoying my cats, doing parenting, occasional Netflix.

But now there is external pressure. The fear of the deadline. The ambition to make changes and the desire for the benefits they bring.

Time to truly get my thinking cap on.

Perspective drawings and lineweights

Today at work I was asked to give advice on perspective drawing to one of our younger staff members. I couldn’t resist a bonus lesson on lineweights once I was done with the basics.

Done on the fly in about 5 minutes.

Done on the fly in about 5 minutes.

So upon getting home I naturally couldn’t engage in any sort of leisure activity until I’d done a version I was a bit more happy with, and a touch more colourful.

New and shiny! Thanks to Linea Sketch

New and shiny! Thanks to Linea Sketch

Getting Back to Work

Bifurcated. That’s the best single word I can think of describing how things seem to me right now. We’re in this strange period of emergence, where things are half locked-down; half exactly as they ever were. 

My working time is now split 60:40 between remote working from home and the office. I’ve written a rota to get one engineer per day into the office for the next 6 weeks. Mini-pie is back in school 2 days a week. Next week I’m attending an actual, real, in-person, external meeting to kick off a new contract. I’ve just been to a book shop where I had to queue to get in and immediately use hand sanitiser upon entering, as directed by a staff member wearing a full plastic face shield. On my walk home, I saw crowds of people drinking beer in the sun, crammed in by the river.

So in this weird in-between phase I’ve found myself making some foundational changes to my approach to my work. There have been three broad areas of change: 

•  Task Management

•  Equipment

•  What’s on my Phone

Task Management - Bullet Journal No More

Since the start of the year, I’ve been using a physical bullet journal to track all of my tasks. Ever since I started using pen and paper, I knew that I was doing it out of sense of wanting to feel in control, but there was always a risk that the sheer amount of tasks I need to juggle would overwhelm the system. That point duly arrived in the middle of last week, when I started going over two pages, and I was losing the will to keep up with it. 

Sorry pen and paper; it was nice while it lasted.

Back to GTD

Whenever I feel overwhelmed or feel I’ve got too many tasks to keep track of, I fall back on the Getting Things Done (GTD) method. This new disjointed life I’m leading lends itself to a more systematised life management scheme than ‘write a list of all the things I need to do in a book that I carry everywhere’, and GTD’s contexts are going to be especially helpful. 

Previously, I used a bunch of Evernote hacks to create a GTD system, but Evernote’s pricing hikes pushed me off their system a couple of years ago. Luckily, an application called Notion has changed their pricing structure to be free to individual users with no limits.

Notion

Notion is difficult to describe in a few words, but for our purposes it can be thought of as something capable of creating a sort of personal website, and that website can have built in elements like databases. The really powerful feature that makes it useful for GTD is the ability to have linked databases. Conceptually, it’s like having a spreadsheet, where individual cells can also be spreadsheets. 

Barebones task table. Very much a work in progress.

Barebones task table. Very much a work in progress.

Above is my Task Table, as it currently stands. This is the master task list, where all tasks are logged with as much metadata as I can throw at them. It’s roughly analogous to my longform list of tasks from my paper notebook. It’s exactly as unwieldy as that, which is why I use the Dashboard to view what is most relevant to every working day.

Heath Robinson Dashboard

Heath Robinson Dashboard

Under each of the main visible headings in the main window, you can see ‘Task Table’. What that is telling you is that each of those two tables you see on the Dashboard are really like windows, peering into the master Task Table. The tables you see in the dashboard really represents a bunch of filters applied to the main table, so I can just look at what’s important.

I’ve got more work to do, especially with context filtering. I’ve made a page which shows me all the tasks tagged with ‘able to do from my phone’ on it, but I need to make a bunch more of those types of shortcuts.

Once I’ve got the full system up and running, I’ll post about setting it up.

Equipment - Mega Mobile Office

The time has come round for The Big Five Year Upgrade, and my venerable iPad Pro first gen is being put out to pasture. I’ve dropped all the pennies on a brand spanking new iPad Pro 12.9”, as well as the Magic Keyboard. This is now the one personal computer for me (home and travel edition). 

It’s not super-grammable, but there’s a snoozing kitty in the background. You’re welcome.

It’s not super-grammable, but there’s a snoozing kitty in the background. You’re welcome.

For the structural analysis software our company uses, I need a PC running Windows 10. Right now at home that’s done by my 15” MacBook Pro (2015) under Boot Camp, which although slightly long in the tooth, is still as capable as any desktop in our office for the work I do. The difference is that now, the laptop will be parked at home, and become effectively a small desktop. 

If I’m in the office, I have a desktop PC. If I’m remote working from home I’m using the MacBook. 

In the medium term future, there may come a time again when I need to travel and design, and under those circumstances I’ll be forced to pack up the fairly chunky MacBook and take it with me. Even in the Before Times though, these events were rare. Usually if I’m travelling for meetings, I’m rarely doing design work: I’m participating in the meeting, taking notes, making sketches. Maybe if there’s a break I’m answering a few emails, or firing off a few Slack messages. This sort of work is iPad Nirvana, and I’ve been doing it for years.

This breaks my computing life down into nice structured, discrete areas. 

1.  Work from home primary computer: MacBook Pro running Boot Camp

2.  Work from the office primary computer: Desktop PC

3.  Constant Companion computer: iPad Pro

Phone

I’ve had to do The Bad Thing

Oh nose. Work emails. Outlook. Bad Martyn.

Oh nose. Work emails. Outlook. Bad Martyn.

I’ve had to relent, and put my work email on my phone. And yes, that is 31 unread emails.

One utterly ruined weekend circa 2009 has kept work emails off my personal devices for the better part of a decade, but alas, the fallout from Covid-19 has pushed even my sacred belief in work/life separation past its usual breaking point. I just receive so much email that I can no longer afford to not to keep on top of incoming messages. Those 31 unread messages came from a productive Thursday spent with focus on one task, and a Friday which ended up revolving around troubleshooting site issues and a scheduled internal meeting. The good news was that even though those 31 emails are marked unread, I was able to glance at them as they came in on either my phone or my watch. Without some sort of mobile access to email, that would just have been a millstone around my neck.

I hope this doesn’t mark a permanent shift for me to routine email access out of work hours. I am acutely aware of the need to keep work and home separate, and that’s what I tell my team. I want people who can switch off as they leave their office, or their home workspace - I believe it makes for healthier staff. I just hope I can kick the habit if and when things go back to ‘normal’.

Hello isolation my old friend

Well it’s safe to say things are somewhat unusual right now.

  1. I am now both designing steelwork and managing my team remotely, which is a bunch of challenges, big and small.

  2. I am now responsible for the care and education* of a mini-me, which is fine and dandy of a weekend, but difficult to juggle with item 1 midweek.

  3. I am troubled about the wider governmental response to the global pandemic, and also very troubled regarding the way in which the construction industry in particular has been handled.

*educational merit of my ‘lessons’ are up for debate

Headlines out of the way, I can say that my entire family thus far has thankfully been unaffected from a physical health point of view; nobody has had the illness as yet. For that, I count myself very lucky. From a mental health point of view, I’m juuuust about coping.

Things which contribute to the near-constant feeling of despair which keep me up at night, staring at twitter, the ceiling, and an ever-growing to-do list:

  • Feeling of responsibility to my colleagues. Working for a small to medium sized business in this uncertain period is plenty stressful enough. When I stop and remember how cash flow affects a steel fabrication business it sends me into a short-lived panic.

  • The briefest of moments when I let my stoic guard slip and think “how is that person managing to do all their normal day-to-day things so well and blog about how their new online classical guitar lessons are going?". I objectively know that whilst some people have accrued time in lockdown, and even though I’m just about treading water and that is fine, every now and again those negative thoughts do slip in and they really affect me. Sometimes it’s jealousy, sometimes disbelief, and sometimes it’s self-loathing because I know that I’m objectively one of the luckiest ones and shouldn’t even be thinking of complaining. None of it is helpful.

  • Constant fatigue. No amount of rigidly trying to keep to even the simplest of schedules can keep someone on top of their game under constant stress like this. Even when I manage to keep to the schedule I’m still usually knackered by mid-afternoon. My attempted schedule is simply:

    • Get up at 5:45 to 6:15am like I do usually

    • Get to my desk by 7am, because I’m usually in my car at that point

    • Eat somewhere vaguely near midday

    • Attempt to be in bed about 10:30 - 11:00pm

On the other side of the scales - Responsibility for keeping me the right side of sane comes from a few places:

  • My immediate family. Everyone is chipping in to help each other keep on top of spinning all the plates. Huge thanks in particular to Mrs Pie for being a total badass about keeping everything going.

  • Being super-fortunate in the place we live, at a macro and micro level. Firstly, York has one of the highest compliance records of Staying at Home, so we feel like we’re in good company. We’re also lucky enough to have a dedicated study where Mrs Pie works from home, and I have commandeered the dining room to set up my Heath Robinson home office.

Not massively Instagram-friendly, but an accurate depiction of my work space right now.

Not massively Instagram-friendly, but an accurate depiction of my work space right now.

  • We also have a small garden, which considering we live in a terraced house in a city centre is an utter luxury. During a working day, Mini Pie has his own room, a playroom and the living room to bounce between.

  • Pets. I know I bang on about my cats, but they’re a great source of comfort and of regular entertainment.

  • Being comfortable not being perfect, or even in the same timezone as perfect for that matter. I have cultivated a mostly-healthy mindset of knowing when good enough is good enough, and I have realistic expectations of how days will pan out. For example, a full working from home day is a success if I complete my work, everyone gets fed, and nobody catches fire. Everything over and above that is a massive bonus.

  • My age and upbringing. I’m a borderline Millennial by definition: I grew up with computers and the internet, so I’m used to getting a lot of my social interaction via a keyboard and a screen. The abundance of video-conferencing now available to me means that if anything, I see more people outside of work than in the Before Times. We’ve been using Slack within my team for internal communications for a few years now, so the day-0 dash to get everyone working remotely wasn’t as big a shift for the design team as it was for all the other departments.

  • Friends both met online, and of the real world. There’s plenty of support out there, and just picking up the phone or joining a WhatsApp group or two can make a big difference.

I’ll make a concession to the weirdness of the times and open the comments. How are you all managing? I hope you’re all safe and well.

What? It's 2020 already?

Oh no, I’m supposed to have a Yearly Theme all ready to talk about aren’t I?

Here’s the problem. Been a bit busy with the old Christmas family hosting gig I took on, so let’s try to figure it out now as we go.

Last year’s theme was definitely a ‘one and done’ theme which revolved around the Big Move. The year previous to that was my Year of Lean, which actually worked pretty well. I’ll chuck that one into my figurative box of potential themes. With that in mind let’s consider the year in review, what’s going on this coming year, and what I’d like to improve upon.

Work

Work, attitude towards work, and work-life balance can always be improved. How did I do this year?

The things that I think went well this year at work were:

  • Training for our newest graduate. He’s coming on brilliantly, and the bulk of the credit for that goes to the rest of the team. My main part in helping has been in trying to give the team the time to dedicate to him.

  • Work-life balance. I don’t feel like I’ve let work invade my home life to an unreasonable degree at all. I think I managed to successfully limit the work I brought home to only that which was necessary given the nature of my work. I can say I’ve probably done a 50+ hour working week just once or twice this year, usually when multiple external deadlines have fallen together.

  • Keeping the plates spinning. I’ve just about managed to keep everything up in the air without significant droppage, and it has been a hectic year.

    Things I think can definitely be improved:

  • People management. I’ve been an accidental manager for a few years now, but I constantly feel like I fail at getting the balance right between getting my head down and doing the same work my team members do (because that is part of my role), and keeping my head up to keep an eye on how they’re doing. It’s too easy to put the blinkers on and say “I’ve got to do my thing” and forget there are a team of people with similar or identical tasks to complete which require my input.

  • Allowing time for self-development. I haven’t done a great job in keeping up with CPD this year. Sadly, it’s one of the things that’s easiest to drop when you need to already be working late to get a tender in.

  • Delegation. I feel a physical, tangible reluctance to give up certain tasks to others. There is quite the list of excuses I regularly tell myself:

    • Oh, it’ll just be quicker if I do it myself

    • This way I won’t need to check the work coming back in at a potentially inconvenient time

    • I don’t want to overload my team*

    • It won’t be done exactly the way I like it

    • Most of these excuses are exactly that. Excuses.

*Ok, so this one is less of an excuse and more of a reason. I know I get the best out of my team when everyone is focussed on a single task at any given time. I do not believe that anyone performs well when multitasking. The way I try to act as a manager is to do everything I can to protect my team from the hosepipe of incoming crap from above me, allowing them the freedom and space to get on with their own work to the best of their abilities.

What this means is that I try to spin as many plates as possible, and pass them onto team members one at a time as soon as they’ve got the last task off their desk. This way the minimum number of people (ideally just me) are multitasking, and the maximum number of people (everyone except me) are focussed on exactly one task. The downside is that is that I end up spinning a lot of plates basically all of the time.

Home / Everything else

Ok, in this category let’s lump together everything else. Health, fitness, other things I want to aim to achieve or improve at, or even just try out.

Things that went well in 2019:

  • Our family successfully moved house in 2019. After making some repairs to the roof, and sorting out a manhole which had been concreted over in one of the downstairs room since the 1970s we have reached a stage where we’re about 95% happy with how the house looks. Hopefully, 2020 will be a year in which we simply get to enjoy our new place.

  • Cats. We doubled our cat quotient this past year, and I neither know nor care if this ends up affecting this year’s theme, but I love my 4 year old micropanther, and I love our new 5 month old tortoiseshell kitten. Cats are aces.

  • Reading. I didn’t read as much as I did last year, but I read a decent amount of books, and I branched out into a little bit of non-fiction too.

  • Tech. I fully broke out of my old habit of seeking out the New and the Shiny for the sake of it in 2019. My phone is now 3 and a half years old, my laptop is about 4 and a half years old, my iPad is about the same, and my Apple Watch is a few years out of date. I don’t care. They all still perform brilliantly, and they won’t be replaced until they start to show signs of letting me down.

  • Music! One of the co-hosts of a rather good podcast was kind enough to spend some serious time recommending some new artists to me, after having spent a decade in the musical doldrums. I’ve since discovered that many of the artists from the playlist are exactly to my tastes; some blindingly obvious (turns out Taylor Swift is good at doing songs - who’d have thunk it?), some a little less well known (hello Alice Merton!).

Things I want to improve in 2020:

Given we moved house in 2019 and that took up a massive amount of time, energy and heartache a good deal of little things necessarily had to make room. Here are things I’d like to improve upon in the coming year.

  • Fitness. I picked up a knee injury about 10 months ago, and I’ve struggled to get back running ever since. I know that what I need to do is build up the muscles around my dodgy knees with bodyweight exercises and very short runs, but I’ve lacked the time, inclination or energy. Got to do something about that.

  • Sketching. I miss sketching. I used to attend classes, but it was tough to fit into my schedule. This year I’d like to try to set aside some time at home with my drawing board and just put in some hours.

  • Writing. I’m very pleased with what output I managed on this website, but I’d like to produce more, even if only about a dozen people read it.

  • Attention span. I think I need to spend some scheduled time away from my phone and the wider internet. I can tell this year of obsessing over the news has been harmful to my ability to concentrate, but on the plus side has proved beyond doubt that obsessing over events which you cannot control is utterly futile.

Pulling it all together

Ok, let’s consider the improvements I want to make and see if we can make any obvious connections:

  • People management skills

  • Delegation

  • Self development (CPD)

  • Fitness

  • Sketching

  • Writing

  • Attention span

Most of these kind of fall under the banner of Self Improvement, which is a start, but it is rather generic. I wonder if Time can tie them together, because I need to make the time to actually improve myself, or dedicate to my team? Or maybe Awareness? Being aware of what I want to do to improve and being conscious enough of it to to make the effort to alter my behaviour? I’m warming to that. It’s punchy enough to stick in my brain, adaptable enough to cover the bulk of what I’m aiming for.

Let’s try it out: Year of Awareness.

Hmmm. Maybe not? How about Rebalance? After a year of being focussed on One Thing, I’m rebalancing and focussing on lots of small things? That covers everything, but refers to none of them. Is that ok? Maybe something that’s the opposite of my failings? Is there something that’s the opposite of being blinkered? Year of Heads Up? That kind of does come back to awareness. Being aware of the world around me, and not being too laser focussed on one thing but also being aware of the desire to improve myself.

You know what, I think we’re there.

2020 - the Year of Awareness.

Detailed design of open section truss nodes

A couple of weeks ago I was lucky enough view a live webinar from the SCI presented by my engineering spirit animal, The David Brown. The subject was one very close to my heart, the design of truss nodes.

I think it’s about time on martynpie.com to bring a little calculation to the fore, and see if I can get at least some of David’s ideas across in a written format.


Let’s get right into the example. A week or so after David’s presentation, I was able to put into practice the methods he described on a live estimate. This particular truss node has been sized by a consultant engineer, and one of our estimators asked me to assess the need for stiffening.

At this stage we have not been given any loadings to make the assessment with, so I was forced to make some rough assumptions.

A couple of notes: I will tend to use breadth and width interchangeably. The distinction isn’t important. I will also make a conscious effort to use the Eurocode term resistance instead of the old British Standard term capacity when talking about how strong members are, but again, the terms are interchangeable.

There are some spoilers in the image. Sorry.

There are some spoilers in the image. Sorry.

As you can see, I’ve assumed that vertical internal member (the 254 UC 89) is working at 80% of its compression capacity (using The Blue Book), which comes to about 3120kN. Furthermore, I am stipulating that the joint is in vertical equilibrium, meaning the tension in the diagonal will be 4412kN.

At this point I’ve also noted down for future use the yield strengths of the two members based on their flange thicknesses, 335N/mm² and 345N/mm².

First job is to check the interfaces where the flanges meet using the rules from BS EN 1993-8 (design of joints) for connections to unstiffened flanges. This should look very familiar to users of the equivalent section of BS 5950-1.

This should look familiar

This should look familiar

We’ll start by checking if the boom (the 356x368x393 UC) needs to be stiffened. Referring to the left half of the diagram above, we treat the left portion of each as the boom, and the right portion as the flange of the incoming 254x89 UC.

We will first establish what the effective breadth of the incoming flange is using the code. The effective breadth is a way of discounting the outermost, more flexible elements of the connection, and it is calculated as per the below.

Extract from BS EN 1993-8

Extract from BS EN 1993-8

As you can see, the effective breadth of the incoming flange is dependent on the thickness of the web of the boom, the root radius of the boom, and a 1 in 3.5 spread through the flange (that’s the 7 in the formula). There is also a dimensionless reduction factor k, which is dependent on the ratios of the yield strengths of the materials, and the relative thicknesses of the parts.

effective+breadths

In the first section, I calculate that the effective breadth is actually wider than the 254UC’s true flange width (owing to the the fairly monstrous size of the 356x368UC), so we allow common sense to take control, and deem that the effective breadth of the 254UC is simply equal to the actual breadth of the UC. I skip the step of checking if stiffening is required, because I know from experience that by inspection it is not required. We’ll see the actual check when considering the 254UC to 254UC interface … well right now actually.

When we move along to checking where the two 254UCs abut each other, we see that effective breadth of in the incoming member is much reduced, a mere 156.8mm compared to the actual width of the UC, 256.3mm. In this instance I have also done another quick skip: if you know two sections are identical, it follows that the reduction factor k = 1. Now we must check as per the code to see if stiffening is required. We compare the effective breadth to yet another reduced breadth, this time one derived from the ratio of the ultimate and yield strengths, and this time we find that stiffening is indeed required.

The quick amongst you may have noticed that there is something a little strange about the above. We have determined that the joint requires stiffening, despite not having compared the force in the members to any sort of member resistance. Personally, I think there’s something a little off about the idea that the code determines whether or not to stiffen a joint without considering how stressed the joint is, and relies on the geometry only. There could be a mere 0.001kN going through that joint, and by the rules of the code it doesn’t matter - stiffening is still required.

At this point in the CPD, David Brown walked attendees through the design of the stiffeners themselves and their required welds which, thankfully for fans of reality are actually related to the forces in the members. As I was performing this particular calc for an estimator, I was content to just assume some sizes of both stiffeners and required welds based on experience, and barrel on to the more interesting bits.

Next, we’re going to check the local tension resistance of the web of the 356x368UC where the diagonal is pulling up with 4412kN.

For now, you can ignore the rough shear diagram. We’ll come to that next.

For now, you can ignore the rough shear diagram. We’ll come to that next.

Boiled down from the verbose Eurocode subscript language, the web tension check is simple enough on the face of it. The resistance is equal to some dimensionless reduction factor ω, multiplied by the effective length of web we can justifiably call upon, multiplied by the width of the web (to give an area of web), multiplied by the yield stress. The partial factor on the bottom of the fraction is equal to 1.0, so can be safely ignored. The fun* comes in identifying the length of useable web, because of nailing down that reduction factor.

*Did I say fun? Sorry, I meant pain. Typical Eurocode document hopping pain.

web tension calcs

Both the tension resistance and the reduction factor are dependent on that effective length, so we hit that up first (well, actually I calculated the shear area of the web first, but we don’t need that juuuust yet). We’ll be ignoring the term with 2√2 in it, because it relates to weld, and if we elect to use a butt weld (which is perfectly possible in such heavily loaded trusses), that number should be zero. So to keep our options open, we do just that. Now we have everything we need, and the calc results in a useable web length of 346mm.

Next on the agenda is that dimensionless reduction factor, ω. All the horrid document hopping happened around here, and for the sake of sanity I’m going to skip it. The only missing variable for it is the shear area of the section (Av), which I calculated at the top of the previous section, because I was a little too eager. Our reduction factor can be seen to be 0.734. Wonderful, we’re making progress now.

With all the pieces assembled, the local check is completed simply. As I said before, when boiled down to its elements the calc is just a stress multiplied by an area, and it gives us a resistance of 2605kN. Our applied load is not the full tension in the diagonal member, just the force in the particular flange at the point of contact resolved to be vertical. Flange force can be reasonably taken as the axial in the member pro-rata to the area of the flange. Our flange force works out at 1600kN, and the resolved component is 1130kN, well below our calculated tension resistance of 2605kN. We press on, emboldened.

Next, we check for shear across the web section, and then combined shear and axial in the boom. Let’s recall the diagram where I scrawled on a rough shear force diagram:

This is just a crop from the larger calc above

This is just a crop from the larger calc above

In round numbers, the shear force at the leftmost flange is 1130kN (the flange force as a point load), then the shear varies up by another 855kN (the web force as a uniformly distributed load), then at the middle flange there are equal and opposite flange forces of 1130kN, so we assume the max shear force is 1130kN + 855kN = 1985kN before the shear force diagram tails back off to zero to the right.

Shear checks the first

The first quick and easy check is for shear alone across the web’s shear area. We calculated the shear area (Av) before when we were doing the dimensionless reduction for the web tension, so that’s a gimme. Shear resistance is the shear area multiplied the yield strength over √3, and the force to resist is that 1985kN drawn on the shear force diagram from before. We can see that the applied force 1985kN is less than the resistance of 2525kN, so on the face of it we are good to continue.

At this point though, we really should be starting to worry about the high shears present: we can see that the section is at about 80% of its shear capacity, which should definitely set alarm bells a-ringing because we also know from the initial assumptions that the boom is also at 75% of its axial capacity. It would be sensible to expect that a combined shear and axial check will not yield good news for our member.

The final chunk of calcs on the page included above are mostly dedicated to finding the elastic shear stress, τEd. When David Brown was giving the CPD he helpfully pointed us to the Blue Book to get the value of y-bar for Tees cut from UCs. What he failed to mention was that the book only has values for Tees up to and including those cut from 305x158 UCs, and so because of the sheer massiveness of our boom we have to resort to hand calcs to get y-bar. Ok, I did have a good time doing that little calc though, so all is forgiven David.

Ouch.

Ouch.

So, having calculated our elastic shear stress (182N/mm²), we simply Von Mises that together with our assumed axial stress of 0.75 and we see …

Oh dear. It’s out by quite a way. 44% over-stressed. Looks like we will have to investigate stiffening that web to bring down the elastic shear stress.

Like before, the full CPD then ran through the more interesting aspect of web stiffening plates, and their limitations. Of particular note: it doesn’t matter how much additional plate you weld to that web, you can only ever take the benefit from the section’s original web thickness again, and no more. In my case, I could take the benefit of an extra 30.6mm of web plate, but no more.

For my part, I again guessed some plate sizes and weld sizes and passed those onto estimating. In all honesty, the weld size to the web plate and the preparation of the plate for fitting over the root radius of the UC are the important factors from a cost perspective, rather than the thickness of the plate itself, so again I just used my judgement rather than spend any more time on hand calcs, as interesting as these were.

So, there we are. Whilst the initial image gave away the required stiffener in the vertical 254UC, it did not spoil the surprise that a 356x368x393 UC still requires some web plates where large forces combine, despite having a THIRTY MILLIMETRE THICK web.

Now the question is, whose responsibility is it to check that the members designed are strong enough in the first place?

Ok, so maybe let’s not do that one all over again…

Yearly Theme - Getting Things Done

Let’s kill two birds with one stone!

Bird one: a topic I promised myself I’d write about.

Bird two: life update slash list of excuses for not writing very much.

Stone: this year’s theme - Getting Things Done

For the past few years I’ve been a fan of the Yearly Theme, as opposed to New Year Resolutions for reasons covered in depth on the Cortex podcast. The quick version goes like this:

Resolutions are often pass/fail, for example:

  • I will start running

  • I will go to the gym regularly

  • I will get a promotion

The minute you skip a run, or don’t wake up in time to go to the gym, you’ve failed, so you can stop trying. And people do, in droves. It’s been a meme for years in fact.

Themes are wider, and more flexible. They can be bent to your will. For me last year was the Year of Lean. I could make it mean whatever I needed, but the essential features of the Year of Lean were to lose some weight, and to reduce the amount of “stuff” in my life. It worked magnificently.

  • Chucking out old jumpers I didn’t need: Year of Lean!

  • Unsubscribing from email lists I never read: Year of Lean!

  • Managed to get out for a run every so often: Year of Lean!

  • Chose not to eat a massive burger and had a salad instead: Year of Lean!

  • Breaking free from listening to multiple tech podcasts which previously fed my rabid gadget fetish: Year of Lean! (Sorry ATP guys)

This year has been at once more successful, and less successful. We are now beginning the eleventh month of the Year of Getting Things Done, and hoooo boy, the Big Thing that had to get Done has very much Been Done. It has been hard work doing so, and it has come at the expense of essentially devouring the year in one gargantuan mouthful.

That Big Thing was of course moving house.

I am very satisfied to report that Family Pie have successfully moved about 300 metres up the road to what is essentially The Dream House (also known as “the house they’ll take me out of in a box”). As you may have read, we had some bumps along the way, but that’s all in the past. We’re in, we’re happy, and we have since doubled our cat quota.

The house has a kitchen big enough for the three of us to eat in, but also a formal dining room for when we have guests. It has a decent study as far away from the front door as reasonably possible, a playroom where all Mini-Pie’s bulkier toys can live, and a guest room on the top floor. We are extremely lucky, and we know it.

But.

The other big goal of the Year of Getting Things Done was to make a sizeable dent in my path to professional qualification (Chartership) and that has essentially come to naught. Now that we’re settled in and all urgent repair and upgrade works are done on the house, I will have more time to dedicate to it, but I am a little disappointed in myself that so little was able to be done this year. Ah well, such is life.

Rather than dive straight back into the Chartership drive, what is left of this year will be dedicated to getting the house ready for Christmas. Funnily enough, I don’t usually get too excited about decorating for Christmas, but I think with a new canvas I’m a little bit over-eager to paint. That, and come up with next year’s theme. I haven’t given it a moment’s thought until ... well actually just now.

Best get on that really.

The B Word and the D Word

There is an unwritten rule for this blog which was, within reason, to stick to evergreen topics as much as possible to keep articles from becoming dated. Relevant to the topic I’m about to write about however is a conflicting rule: I want to write about things that I am passionate about. This essay has been burning in my belly for some time now, but current events have brought it up to the figurative boil.

For historical context, I write on the 1st of September 2019. The current UK government has declared that Parliament shall be prorogued from the 9th of September 2019 to the 14th of October to, in their words, deliver a Queen’s Speech laying out their future business. In reality, the biggest impact of this prorogation (the longest in decades) will be to limit the available time for Parliament to legislate against the Government’s current policy of trying to ‘run down the clock’ and allow the UK to leave the European Union without a Withdrawal Agreement. This weekend has seen mass protests across the UK with citizens in outrage of the proposed prorogation, viewing it as an affront to our democracy. Just this morning Minister without Portfolio, Michael Gove has publicly admitted that should the UK Parliament manage to pass legislation to prevent the UK leaving without a Withdrawal Agreement, the Government may choose to simply ignore it.

In simpler words, the Government might choose to ignore UK law if it serves its interests. This is a Very Bad Thing.

For many reasons it is very difficult to express a balanced view of the current state of UK politics, and how it is viewed by the wider public. For instance:

1. The animosity between either side of the Brexit debate is fierce. To express an opinion counter to the extremes of either group is to brand yourself a ‘traitor’. The language being used to describe people across the political spectrum is venomous, dehumanising, and massively unhelpful.

2. Because of this resentful divide, it becomes difficult for people to decouple actions or words that benefit their partisan aims from actions that are shortsighted, divisive, or unlawful.

3. As a result of this difficulty, there is a wide and particularly problematic misunderstanding of the already vague word ‘democracy’.

So before we talk about why the current UK Government is doing demonstrably terrible things with obvious and avoidable negative consequences for the UK as a whole, we need to talk about The D Word.

Democracy

What even is democracy?

Depends who you ask doesn’t it? In the UK we operate a Parliamentary Democracy. Under this system, to massively oversimplify, our country is divided into small areas called constituencies, and each constituency elects a representative (Member of Parliament, or MP for short) who then divides their time between their local area, and time in London at the UK Parliament.

First point of confusion. Many people disagree about whether or not their MP is simply meant to ‘tell Parliament what the majority of people in the constituency think’ or whether they are meant to act in the best interests of the constituents even if their best interests run counter to locally held opinions on the matter.

The wording in the YouGov poll isn’t precisely the way I would have put it, but you can see the broad strokes.

The wording in the YouGov poll isn’t precisely the way I would have put it, but you can see the broad strokes.

In my opinion, this should not be up for debate. The reason we elect representatives, is because we can task them with taking the time to understand and therefore vote in good conscience on issues we neither have the time nor the capacity (on average) to do so. I like to think myself a relatively intelligent person, but do I want to spend dozens of hours poring over fishing policies, proposals on changes to inheritance laws, or defence budgets? No, frankly I don’t. I have taken the time to vote for a representative who will do so on my behalf. Neither do MPs operate in a vacuum: when I have opinions on upcoming policy I can make an appointment to visit my MP to inform them, or write a letter, or send an email.

But the fact remains, that a significant portion of the public are of the belief that their MP should just ‘do as they’re told’ (aside: do you think people who hold that opinion would want to be an MP?). So even before we move onto ad-hoc referenda which are in conflict with our already ‘established’ version of democracy, we already have a difference of opinion over what our country’s version of it is.

Referenda

Our next flavour of democracy is the Referendum. I am sure all readers are aware we had one of those not so long ago, and ever since then its effects are inescapable. Let’s face it, as you read this very text you are metaphorically entwined in its betentacled clutches.

You right now.

You right now.

In the UK, a referendum is a nationwide vote on a particular issue which is meant to be binding on the government of the day. It is very understandable version of democracy, a question is asked or a policy is put forward to be either rejected or accepted, and winner takes all.

This simplicity, I would argue, is part of what makes some of the current language, propaganda, and slogans being used so attractive to people, in particular those who voted to Leave the EU. A very simple argument to form is “we won the referendum, do as your told and leave the EU”. It will be relevant to note that the referendum chose by a narrow, and now famous margin of 52% to 48% to leave the European Union. It was not a resounding victory by any means.

There are fundamental questions to be asked regarding the way the 2016 EU referendum was crafted, because with a little more care and forethought, the very real economic, and now Constitutional uncertainty caused by it could have been avoided. The open-ended question of *exactly how* the UK was to leave the EU, should the populace choose to do, so is the very reason there is now such confusion about democracy.

Democracy vs. Democracy

I am emphatically not a lawyer, so I am utterly unqualified to debate the merits of which of these two forms of democracy should trump the other, but it is obvious for all to see that there is an ongoing conflict between two competing democracies, and for the purposes of this essay, and being able to correctly judge the UK Government’s recent actions, that there is an unresolved conflict is all that matters.

It is easy to find comments on websites, placards at rallies, and quotes on vox pops on the news saying that to protest against the prorogation of Parliament is “anti-democratic”, because it subverts the “will of the people”. This is plainly only part of the story, because as we know there are two democracies in play. One of the democracies chose the direction of travel - that is the Referendum chose to leave - and the other democracy, our Parliamentary democracy, has been left to figure out exactly how it is should be done. Both are legitimate, and neither can or should be ignored.

The most obvious way to get around this fundamental impasse would be some sort of compromise: the UK would leave the EU in a way which the 48% of the public who wished to remain can be in some way placated. Unfortunately for fans of practical solutions that might just about please everyone a little bit, three successive UK Governments have by negligence and choice made compromise essentially impossible.

The slow death of compromise

The Cameron government devised the 2016 referendum badly, and then failed in the campaign to call out lies by the Leave campaign in at attempt to avoid damaging inter-party public arguments. This allowed the Vote Leave campaign in particular the latitude to frame the arguments in the most base and false ways, and marked the start of a ratcheting of rhetoric across the whole of the debate. Compromise was already under threat from the uncontrolled lies spread by Leave UK and the combative and negative tone they set.

The May government was the first to actively choose to throw compromise in the figurative bin. After an initial period marked by silence and evasion, May decided to trigger a snap election, actively seeking a mandate to enact her Brexit strategy. The election resulted in May losing her majority, with a return to a hung Parliament. The country effectively said, “we don’t particularly want what you’re offering, and we feel much the same about the opposition”. At this point, May ought to have recognised the country’s need for compromise, but instead veered maniacally into a brick wall as she began to behave as if she’d won a thumping majority. The UK was to leave on what was, in terms of all referendum campaigning and political speculation since 2016, the very hardest of Brexits. The ratchet moved another tooth on its travel.

Now we arrive at the Johnson government, and in the space of a few short weeks we’ve moved from May’s policy of Very Hard Brexit, to Johnson’s policy of seeking to leave without a Withdrawal Agreement at all. It is important to note that under the May government, MPs from all parties voted for and passed legislation demonstrating a firm rejection of taking this action, deeming it economic suicide. A similar group of MPs are planning to do so again.

I feel I need to remind everyone, that this where public opinion was in 2016.

I feel I need to remind everyone, that this where public opinion was in 2016.

So, compromise is dead, and Winner-takes-all politics becoming the new norm under PM Johnson, probably due in part to the success of President Trump. Political norms can no longer be taken for granted, as a politician operating with wrecking tactics simply ask themselves “what are the costs of breaking these rules?”.

Bollocks to the rules

Prime Minister Johnson’s chief advisor, Dominic Cummings has been held in contempt of Parliament, yet is now one of the most powerful people in Whitehall. What tangible, life-affecting cost has been borne of his being held in contempt? None. He probably has an official letter telling him as such, which he has either framed, or shredded.

Johnson and his team under Dominic Cummings will be looking at every gentleman’s convention that can be waived, every prerogative power that can be abused, and now any laws which can be simply ignored and asking themselves: “what can be gained by doing this, and what will it cost us?”. As with Cummings’ contempt, many of the costs will be “none at all” and many will be “none in the short term”.

Except not.

Because this returns us to our first question: what is democracy? We might not be able to get anywhere near a consensus on what democracy is, but we can agree what it is not.

It is not sending the voting body away for 5 weeks because they might force you to do something you don’t want to.

It is not ignoring laws which do not suit you.

It is not (as is currently reported as a possibility) sacking and deselecting any MPs which vote against the government.

(Note: this is one of the reasons I want to get this out now, before it’s outdated. By tomorrow lunchtime there might be a bloody general election on the cards and all this becomes somewhat redundant)

All these moves have a cost, and that cost is the erosion of our Parliamentary Democracy. Whichever way you voted in the referendum, allowing a government to act in this way allows all future governments to do the same, and any one of those next times they will probably do something you disagree with.

And yet you may cry: doesn’t allowing MPs to block No Deal defy the other democracy; the referendum result? Well no, it doesn’t at all. All the referendum result does is declare that we should leave, not how. The method of leaving has been left to the Parliamentary democracy, and Parliament must be allowed to operate.

Anything less is not democracy.

Mobile office

Some people, especially people on the internet, love to know what gear you use, so as an easily digestible piece of written content: here’s what I carry when I am out of the office.

Because I’m writing this at the weekend, I’ll start with my weekend bag, which I like to think of as my writer’s bag:

I use a Visconti messenger bag and the usual contents are pictured below:

Weekend / writing

Everything about my weekend bag is getting down to the minimum viable amount of things to get any amount of writing or sketching done should I get a free block of time. My primary writing device is my venerable iPad Pro combined with an absolute star of a travel keyboard. The K380 is perfect for my needs: it syncs with my iPad with no fuss, and it works happily with my MacBook Pro regardless of whether it’s booted into OSX or Windows 10. The included set of AA batteries lasted about 10 months, and it’s survived one decent coffee spill and a pretty significant drop onto a hard floor so it definitely counts as rugged. As backup, I’ve got one straight up Moleskein notebook and one pen, and for keeping my fingers busy when I’m thinking (procastinating) I carry my Qiyi Warrior 3x3, which is a cheap-as-chips intermediate speed cube.

Aside: I am by no means a speed-cuber: my average solves take about 90 seconds, but the stickerless Warrior 3 is about half the price of a Rubik branded cube, and much faster, quieter, and lighter.

Ever present in my bag is my Frank Green travel cup, which I adore. I think they’re pretty damn stylish, they’re fully recyclable, you can configure your own colours, and replacement parts are available at prices not designed to gouge your eyes out. Oh, and you can open and close the drinking hole with one hand, which is extremely helpful.

If I’m travelling and will need my laptop, I carry a Thule Stravan rucksack, which not only accommodates an abundance of gear, it comes with dedicated storage for my MacBook Pro 15”. My bag is a very fetching shade of purple which I can’t find any more, but the cobalt blue in the link is a good enough match. It also has a dedicated iPad sleeve at the back which fits iPads up the old 9.7”. size. I love it, and I’m even minded to buy a pre-emptive replacement for mine at the price in that amazon link, because I paid about twice that when I bought mine back in 2015.

The contents on a typical day are below:

rucksack contents

New items over and above the weekend bag are:

The extras (other than the laptop) are mostly based around going to meetings, hence the abundance of extra pens for marking up drawings, the business card holder and the battery pack. If I’m going to meetings my phone tends to take a hammering, either just via train travel or quite often because of tethering. I can usually get through a day travelling with my (now two and half year old) iPhone 7, but it’s touch and go by evening so I tend to use the charger if I get any downtime to top up.

I carry the USB mouse, because if I need my laptop, I’m almost certainly going to be using 3D modelling software or plain old 2D CAD. Good as the trackpad is on that 15” Pro, it cannot hold a candle to a mouse with a scroll wheel that doubles as a third mouse button for panning in either of those cases. I could have splashed out on a wireless one, but they’re heavy, and I’d need to carry spare batteries.

The knife is just one of things you never know when you’re going to need, but I’ve lost count of the amount of times it’s come in useful. I’ve had it since I was about 18 I think; I can’t really remember a time as a functioning adult I haven’t had my Swiss Army Knife. The monocular is handy on sites for being able to look at construction details from outside of exclusion zones, or at height when you don’t have access. It’s not exactly essential, but it’s come to find a place in my travel bag, because the times I do need it tend to be when I’m out and about rather than at home or at the office.

Note: none of these Amazon links are affiliate links. I wouldn’t even know where to start setting up that kind of thing.

The year of the move

It’s been a busy time at Pie Towers recently. Pies Mr, Mrs and Mini have been trying to move house for some months now, which at the best of times is tricky but as it turns out our timing was… well let’s say that the timing has been deeply unhelpful.

It’s time for a barely edited ramble:

My wife and I had earmarked 2019 as the year we would leave our beloved mid-terrace just outside of York city centre and try to find something a little bigger with more separation of living spaces. We knew we couldn’t bear to leave our central location as we are utterly spoilt for schools, for the community, for the much beloved high street round the corner, and for almost car free living outside of my work. Essentially, we were looking for exactly what we already had, exactly where we already were, but… a bit bigger. So far, so simple, but also so constrained.

As luck would have it, exactly what we were looking for was in fact right on our doorstep. We found a beautiful end-terrace we could afford with loads of corridors and twists and turns just up the road. It was perfect: all we had to do was get our house sold.

And therein laid the rub.

Overshadowing our whole adventure was our country’s dalliance with unprecedented international self harm. The ‘B’ word. The Bad Thing.

We had sold our house subject to contract after just a few weeks of viewings. At the time it was interesting to watch how certain events in Brexit Calendar affected the mood of house buyers. The week leading up to the much delayed ‘meaningful’ vote depressed viewings to effectively zero. Once the drama had passed, viewings were up to a half dozen every ten days or so. If I spoke to people about The B word, respondents fell broadly into two categories: the first were just depressed about the whole thing, and subsequently couldn’t imagine buying or selling a house under such circumstances; and the other group were of the opinion that it would all come to nothing, and no tangible effect would ever be felt.

Then the Big One hit home. Three weeks before our intended move date in early April, our buyer pulled out, citing Brexit uncertainty as one of their main reasons for deciding not to buy.

What followed was two months of frantically trying to find a new buyer in time to keep our upward chain intact, despite the omnipresent B word. Mrs Pie and I would typically spend a good hour to ninety minutes preparing our house for a viewing and looking back through my calendar I can see we did this no less than thirty times over the whole period from January to today. I dread to think how much time I’ve spent on the phone to our estate agent, and that of our vendors in this time, as well as time spent conducting viewings our agent couldn’t attend (Sundays, Bank holidays, and times that just didn’t work) and writing emails to everyone involved.

Fast forward to this weekend, and for now, the worst is over. After all the effort we do have a new buyer in place, and despite the fact that nothing is stopping this new buyer from pulling out, I’m going to let myself enjoy this period of what feels like both emphatic victory in the face of insurmountable odds and also relative calm after a frankly atrocious couple of months. Our whole upward chain remained intact, in part because our vendors withheld from going back on the market for weeks to allow us as much time as they could, despite the house they were intending to buy was put back up for sale within a week of our buyer walking.

We are very grateful. Even if things do fall apart again, I’ll take the hit from allowing myself to just believe that things will go well this time. That’s my choice as an optimist. I think that’s easier than the alternative.

So tonight I look forward to a week at work where I am no longer in two mental places rather than one for the first time in what feels like six months, but in reality has only been about eight or ten weeks. And maybe in the evenings I can start to think about the fun parts of moving: getting rid of old junk, figuring out how we’re going to actually live in the space, and I can definitely see this as a great hide-and-seek house. Someone mentioned a housewarming party the other day; if this all goes through, I can tell you that there will be a hell of a party once we’re moved in.

Fingers crossed for us?

Thanks

1.2 - Communication

Objective: Ability to demonstrate effective communication and interpersonal skills

I’ve never imagined that I might struggle on this requirement, in fact, I’d be surprised if many candidates slip on this. The guidance starts by saying that candidates should “demonstrate competence in effective communication and interpersonal skills using written, oral and visual media. I like to think I’m fairly proficient in writing, speaking and sketching which covers the main bases there.

The guidance goes on to list a plethora of ways a candidate should demonstrate their ability to communicate via:

1. IT links

2. Produce spreadsheets

3. Produce database documents

4. Develop an ability in writing letters, summaries and reports, both factual and interpretative.

5. Where appropriate develop drawing skills

6. Be able to produce drawings to illustrate concept appraisals, feasibility studies and initial design details.

7. Have the ability to prepare and deliver presentations, project précis or design concepts etc.

8. Have an appreciation of the skills of other professionals in the construction team and demonstrate an ability to work as an effective member of a team.

Looking at items 1, 2, and 3 I feel like the advice might be a little out of date. I don’t know many engineers who have to produce “database documents” and I’ve never even head of “IT links”. As it happens our estimating software is built off a database, but frankly I don’t think being able to use it has the least thing to do with communication. 

Similarly, letters have been mostly replaced with email which is one of the cornerstones of communication in modern engineering. I imagine if I were to take a look at the sheer amount of email I’ve written in the past decade I’d have some sort of Total Perspective Vortex moment and be struck down with inescapable horror at the amount of time I spend hammering at my keyboard in an attempt to keep the business moving. I must have written at least one or two decent ones that can go in the portfolio. I’ve had to write some factual and interpretative reports in the last few years as well, so I can certainly tick off that particular box.

I try to draw for pleasure in my spare time, and I hope it shows in my work. My sketches are mostly of connections, and sometimes of general construction details, but hopefully their colour and clarity of line work makes them stand out. I like them. Owing to the nature of the work of a fabricator I don’t have masses of sketches of concept appraisals, or feasibility studies; we’re usually a long way past those stages by the time we get hold of a project. I must say I do wonder where it would not be appropriate to develop drawing skills though…

With regards to delivering presentations - it has admittedly been a while since I physically stood up and delivered a formal presentation, but I’ve never shied away from standing up in a room and making myself heard, and by Grabthar’s Hammer I do so enjoy making a good slide deck. 

Of the last item on the list, I feel I’m particularly well placed. I have spent the vast majority of my career at a level where I am present and active in regular design team meetings giving me a good all round appreciation of the input of the other professionals. On top of that my Masters degree was cross discipline for the first two years, then specialised for the final two. The “selling point” of that particular degree was really to produce multi-disciplinary consultants, and whilst for me that emphatically did not happen (hence, well, this entire blog), it does give me a decent appreciation of the other engineering disciplines and how they fit in with construction. 

In summary, without sounding smug - I think this section is not going to present a worry to me.