I have a project with 5 levels of below-grade floors, therefore those floor slabs are also under lateral compression loads due to the soil pressure on the basement walls. It is all CIP concrete. Some floors will be 2-way flat slabs others will be one-way with beams. Is there a preferred method...
I'm faced with a new (to me) concept. Designing a 'structural slab' for support of traction elevator machinery as opposed to using steel machine beams. I have a steel-framed building and an elevator bank of 6 shafts (3x2 back-to-back). Do I just need to design a thick concrete slab spanning to...
I just came across a detail on drawings circa 1970, North Carolina. For attaching a metal guardrail post to a concrete slab, the note on the drawings pointed to a cast-in-place metal pocket and said "set post in molten sulpher." (I would normally say, "set in grout".)
Does anyone know what this...
Does anyone have info on Raychord open-web steel joists? The top and bottom chords are cold-rolled gage metal channels and the web is a continuous gage metal angle. I believe they are circa 1960's.
mdaskilewicz@cuh2a.com
A fabricator is proposing using cramic back-up bars on CP moment connections. Says that's what he based his bid on. I never heard of them. Anybody know anything about them?
mdaskilewicz@cuh2a.com
ACI 530, paragraph 1.13.3.2:
Does this refer to anchorage only to roofs and elevated floors?, or does it also apply to the floor that the wall is sitting on? If so, what does "direct connection" mean? Is the friction between mortar and floor slab a direct connection? Or are a keyway or...
BOCA Table 1606 says: Hotel, Guestrooms and coridors = 40 psf; public rooms and corridors = 100 psf. I think ASCE-7 says "guestrooms and corridors serving guestrooms = 40 psf".<br><br>I interpret this to mean that the elevated floors that have only guest rooms and a corridor down the...
I am currently doing some modification work on an old 4 story apartment building in Penna. supposedly built in the 30's. Only in the basement is the steel structure visible--wf beams, open-web joists, some small I-beam joists. The elevated slabs are concrete poured on a draped steel mesh--in...
