During a random inspection I notice a GC had installed lock washers between the nut and hardened washer on a A325 3/4" bolt used to support a steel frame platform.
AISC does not allow the use of this non-ASTM lock washer right? I know the hardened washer is recommended for this purpose alone...
I have a 10'x18.5' floating slab foundation w/minimal loading (12,600 lbs of equipment in various cabinets). The slab is 6" thick w/#4 placed both ways at 12" O.C.. The slab is placed on compacted crushed stone.
The loading equates to 185-lbs/SF and the soil pressure is approx 1000lbs/SF...
I have a 10'x18.5' floating slab foundation w/minimal loading (12,600 lbs of equipment in various cabinets). The slab is 6" thick w/#4 placed both ways at 12" O.C.. The slab is placed on compacted crushed stone.
The loading equates to 185-lbs/SF and the soil pressure is approx 1000lbs/SF...
