Can minimum reinforcement in short concrete column go below 1%??
Can minimum reinforcement in short concrete column go below 1%??
(OP)
As I read ACI 318, I don't see any provision for allowing less than 1% steel/concrete ratio. I understand the reasoning for that, however......if for reasons other than the structural load-carrying capacity of the column I want to make a larger column..........do I HAVE to reinforce it more heavily?
For example, I designed a 16" circular pier, with (6) #6 bars to carry my loads. Now the concrete guy wants to use a 24" x 24" pier. My loads haven't changed. Must my rebar?
Thanks.
For example, I designed a 16" circular pier, with (6) #6 bars to carry my loads. Now the concrete guy wants to use a 24" x 24" pier. My loads haven't changed. Must my rebar?
Thanks.






RE: Can minimum reinforcement in short concrete column go below 1%??
Dik
RE: Can minimum reinforcement in short concrete column go below 1%??
RE: Can minimum reinforcement in short concrete column go below 1%??
RE: Can minimum reinforcement in short concrete column go below 1%??
Dik
RE: Can minimum reinforcement in short concrete column go below 1%??
To extend PostFrameSE's post further-----
How do we distinguish between a flexural & a compression member?
Typically we treat vertical elements as compression members. Should a vertical element with minimal axial load be treated as a compression member or a flexural member for determining minimum reinforcement?
Chapter 21 - special provisions for seismic designs, distinguishes a flexural member from a beam-column if factored axial compressive force on the member does not exceed
Ag.f'c / 10.
Any thoughts?
RE: Can minimum reinforcement in short concrete column go below 1%??