Hi all,
I'm having trouble controlling story drift on a steel moment frame structure with a tall first story (18'-0"). I have been reviewing the multitude of other threads about partial base fixity but wanted to compile my understanding here for some additional input. Here's my specific...
Hi all,
I'm working on a project that is 2 stories, structural steel superstructure with moment frames in each direction for the LRFS. Seismic design category B so R=3. Despite the relatively low seismic parameters, its quite heavy and seismic is controlling the design with some pretty...
Hi everyone,
I’m working on a project involving a conventional steel office building with a 2nd-floor concrete slab over a metal deck. The project requires the elevated slab to be as crack-free as possible, and budget constraints are not a major concern. I’ve been researching extensively and...
Hi all,
We frequently design large industrial buildings with steel deck diaphragms. Some of our customers desire to install multiple, very large roof vents to properly ventilate certain production areas. I have been trying to better understand exactly how to properly design the diaphragm for...
Hi all, my team is looking for a software that has the following (apparently hard to find) qualities:
[ol 1]
The ability to capture flexible diaphragm behavior correctly. I say "correctly" simply because the software I've demo'd so far that claims to have this feature does not dump the diaphragm...
Hi all,
Some background: I am designing a fully composite insulated concrete sandwich panel tilt up wall panel. My situation is a 35'-0" tall panel with restraint at the footing, restraint at 5'-0" above footing into slab on grade, and restraint at the top of the panel to roof steel/diaphragm...
Hi all,
I have a situation where I need to reinforce a few interior columns in a large warehouse for new axial load due to large RTUs and associated snow drifts. The columns are pinned at the base by a standard baseplate and restrained laterally at the top by a flexible diaphragm. Due to...
Hi all. I am seeking advice on some detailing issues with an interesting framing layout I am working on. See attachment and forgive my penmanship.
It is a conventional steel framed octagon with a 3:12 roof slope. Steel deck spans parallel to roof slope. Two questions:
1) For the low eave...
Hello all,
First post. I am working on a project now that is a structure in a high seismic zone. PEMB structure so rigid frames in one direction and rod x bracing in the other. The PEMB will sit on piers that are on shallow spread footings.
The question has come up on whether or not the anchor...
