Minimum Transverse Reinforcement Ratio For Cast In place Concrete Pile
Minimum Transverse Reinforcement Ratio For Cast In place Concrete Pile
(OP)
I need help identifying what the minimum transverse reinforcement ratio is for a 12-inch diameter drilled pile. fc=6000psi fy=60000psi. The 2007 California Building Code section 1810A references ACI 318 21.4.4.1-3. Section 21.4.4.1 says that the minimum transverse reinforcement ratio is given by the equation r=0.12*fc/fy. This gives me a reasonable result. There is a comment below that equation that references ACI 318 eq. 10.5 which is for columns. My question is which equation governs. If I use ACI 318 eq. 10.5 the required transverse reinforcement gets a bit out of hand requiring a #5 spiral at 3-inch pitch. I know that designing from the gut is not the best idea but I have seen quite a few pile cages go in the ground with much smaller spiral steel at a greater pitch. Any help on this would be much appreciated.





RE: Minimum Transverse Reinforcement Ratio For Cast In place Concrete Pile
The only place you'd use 318 is in the top of the "pier" where it comes out of the ground and is essentially a short column, - in those areas the typical column tie requirements would control.
For the in-ground piers, ties can be less intense.
RE: Minimum Transverse Reinforcement Ratio For Cast In place Concrete Pile
The 2006 IBC has similar requirements to the CBC.See section 1810.1.2.2 for cast-in-place pile reinforcement requirements in SDC D thru F. This section references ACI 318-05.
RE: Minimum Transverse Reinforcement Ratio For Cast In place Concrete Pile
RE: Minimum Transverse Reinforcement Ratio For Cast In place Concrete Pile
RE: Minimum Transverse Reinforcement Ratio For Cast In place Concrete Pile
For 12 and 16 inch piles, I typically use a single 15M bar (#5) by 6m long (approx 19')
Dik