From what I've always seen, you only are required to check deflection under LL or SL. They level and install them once the building DL is in place so the only deflection is the LL/SL component. We recently designed a frame to span ~75' with those deflection limits. Definitely only used SL.
Since they appear shallow and aren't broken off, my vote would be for knots in the plywood formwork. These would be limited to a single-ply depth. The roughness of them further advances this theory in that the inner plys of plywood aren't sanded smooth before gluing.
I will always make time to answer an existing client's questions regarding a new project. For new clients, it is a case by case basis for how much time I spend with them. This has worked extremely well for me, especially on the contractor side. I have a few said contractors that go into a new...
To expand on what STrctPono said, the 6 represents 1/2 of the wall height which is the seismic weight assigned to the level in question. This is important in determining how much load the diaphragm delivers to the LFRS.
Could you point me to this information please? Sounds quite interesting!
Your post as a whole was spot on! Failures are unfortunately a great learning opportunity. Especially when they are on the edge or beyond what is considered “normal” design. As I said before, I haven’t spent as much time...
Anyone care to venture how much time they have spent investigating this failure? The amount of time some of you have put in to this is incredible! There is so much that wasn't included in the NTSB report, at least not in-depth, that has been hashed out here and is great information. Not just...
I haven't read them yet, but while browsing the list of accidents, I couldn't help but notice that 7 out of the first 9 most recent incidents listed occurred in Florida? There were a few wind related ones, but most were not related to extreme wind events. Any ideas why this is?
Vance/phamENG
We were talking about this internally from a Revit perspective a few months back. When you load a new beam size in that wasn't in the project at that point, for whatever reason, Revit defaults to the smallest beam in the beam family. So if you have 30 beams highlighted and you...
About 550’ of wall....why do I need bracing at top of the tilt-up wall?...haha. There is a diaphragm at the top. Should have said no bracing below the diaphragm level so the foundation wall need to be “fixed” for stability.
Background:
45' wall warehouse. 15' tall foundation wall (full soil fill) with 30' tilt-up panel on top. No bracing for either wall. Built on weathered dolomite (qa=5,000 psf) so rotation of a cantilever wall is likely minimal.
Question:
Are there any quick rules of thumb for establishing...
Plenty of 144’ tall, 10+ story, steel buildings out there with braced or moment frames. 18’ is a ridiculous floor to floor height and you will likely get laughed at by any investors that work on this type of development. We recently completed a hotel that was 8 stories of steel with braced/...
I think you would be better served to sit down with your senior engineers and ask them your questions. It seems like you are trying to wear a lot of hats without having enough experience to make some of these relatively basic, but highly important preliminary decisions. They will have a better...
Doesn't it seem like 1 gallon is a pretty standard unit of fluid measurement (US or Liberia of course) to be using? I put this one on the automakers....100% agreed on the buns though.
Can anyone explain to me why vehicles are designed with a windshield wiper reservoir capacity of about 3/4 of a gallon when the standard unit of fluid for sale is 1 gallon? I think all the vehicles I have owned, with the exception of my 2015 F-150 (maybe), only hold 3/4-7/8 of a jug of fluid...
I assume this is the post you are looking for? It is from JAE on 10/15/19 @ 17:06 (not sure if this time is location specific in the world or if it is GMT).
I have said this exact thing to my colleagues. Couldn't imaging something like this happening with full occupancy - like Mardi Gras or the 2024 (?) Super Bowl.
I ended up watching the last part of the board meeting, but it seemed to me that they didn't just focus on FIGG as the one to shoulder the blame for ignoring the warnings signs. Maybe I misinterpreted this and will re-watch when I have time.
