I have two transfer girders that I must remove that support a single concentrated load of 1,000K. I have developed two schemes but I am having difficulty developing a method on how to preload my new structure to minimize deflection as load is transfered over. With such high loads and being on...
We have run into parking bumpers installed in northern climates that are disintegrating. We are told they used air entrained concrete. The concrete just flakes off at the touch. In some cases 1/3 to 1/2 are gone. Has anyone else experienced this and know what might be causing it?
Does anyone know of a publication that addresses how wheel loads are applied to structural floor slabs? I have a case where forklift is appling load to a structural floor made of 4" concrete slab on 2x10 floor joists. My preliminary calc shows the joist would fail. However, they have...
We stoped designing cantilever firewalls like you are noting. We have gone to (2) gypsum board shaft type walls or (1) gypsum board wall with fusable connections that burn away on the fire side. Try UL U336.
Otherwise we have desiged the wall as non-structural element for seismic load since it...
I have a technical question regarding quality control for field mortar. ACI 530 suggest ASTM C270 (but this requirement only applies to laboratory mortar) or ASTM C780 (does not indicate strength values only procedure). Does anyone know the real way to ensure quality mortar at the job site?
Thanks.
