Foundation Pier for steel frame
Foundation Pier for steel frame
(OP)
Are we correct to neglect the uplift on concrete piers due to steel column in frames building.
Also, am I correct to design pier as stand alone pedestal for reinforcement purposes?
Also, am I correct to design pier as stand alone pedestal for reinforcement purposes?






RE: Foundation Pier for steel frame
But if there's uplift, you don't neglect it. You design for it. Now maybe the weight of the pier is enough to resist it, but you need to check.
RE: Foundation Pier for steel frame
These piers will be part of a 100x100 ft building. Uplift on columns is not a lot and can be omitted?
In another problem, I have this 48 ft diameter circular slab 24" thick. Slab will support liquid retained tank and sit concrete columns. I ran my analysis and have plate moments and plate shear values. I have modeled this slab as plates. However, if I want to verify whether concrete beams are required, which ACI check shall I look into?
RE: Foundation Pier for steel frame
On your circular plate model, beams would be required if a flat slab/mat doesn't work under all provisions of ACI for moment, shear, deflection, etc.
Your question is pretty vague and if you absolutely need an answer - then the answer will be vague - i.e. ALL the ACI 318 provisions must be met.
RE: Foundation Pier for steel frame
Regarding the circular slab, moment capacity and shear capacity of the plates need is satisfied. Just wanted to read opinions of various approaches.
RE: Foundation Pier for steel frame
Mike McCann
MMC Engineering
http://mmcengineering.tripod.com