Ok!
So, the most common problem is nothing to do with their appreciating of statics - I don't expect them to know
anything about that to be fair. The most common problem is one of them not being able to take a good stab at what a structure will look like and come up with details based on that.
You regularly getting obstructive architects who won't begin working until you've given them EXACT steel sizes which is impossible
without their input first! This is especially frustrating with "well understood" structures like warehouses/supermarkets and straightforward office blocks.
The next most common problem is drawings that have roof sections (typically eaves details) drawn correctly in one plane, (say the rafters are spanning into/out of the page and the roof purlins spanning across them) then when a section is drawn at 90 degrees to it they've cut and pasted the steel and shown it in the same plane as the other drawing when the rafters should be spanning across the page and the purlins in and out.
This is particularly annoying when you've designed your purlins based on them spanning OVER a rafter, and when it comes to the crunch and they revise their drawing they show them within the depth of the rafter which invalidates their design (they can't double span).
Some architects have a great eye for details - air seals, flashings, avoiding cold bridges etc, but just don't have a clue about basic structures. By this I mean they ask things like "Can I just take out this column?" which get replies in the area of "yes, but it will mean the introduction of a large beam which will inevitably exceed your head height restrictions".
I could go on, but if I get on a rant I'll not shut up!
