Ast in Short Column?
Ast in Short Column?
(OP)
I've been doing a lot of steel buildings lately where the prefab steel column sits on a pier (short column). ACI 10.9.1 says I need .01Ag of steel. Well my client is saying that his other engineer specifies half the reinforcement that I do. Is there some provision I'm not seeing or is the other engineer in the fault??






RE: Ast in Short Column?
A pier is more along the lines of a continuously supported column and does not behave as a column.
We use them all the time.
The 1/2% min reinforcement is a very common geotech recommendation (unless you need more for uplift)
RE: Ast in Short Column?
RE: Ast in Short Column?
frv; I agree, often times these piers are even connected to a foundation wall, however, are you familiar with any part in the code that allows this?
thanks for the quick responses.
RE: Ast in Short Column?
I don't think it's so much a matter of the code "allowing" this as it is a matter of the code (318 anyway) not dealing with it.
The commentary will point you toward publications that deal with piers and piles (to this day I don't know the difference).
I have no idea how this would be affected by being in a seismic zone, but I can tell you from experience the 1/2% is very common in non-seismic zones.