Checks for limiting parameters (pile cap: ACI 318)
Limiting reinforcement parameters are specified in Design Options > Foundations > Isolated Foundations > Reinforcement Layout
Check for distance of pile cap overhang
The check passes if:
| min ei |
|
min (emin , emin,user) | ||
| where: | ||||
| emin |
|
MAX[230mm, 380mm - 0.5 * lp] | when Rc ≤ 534 kN | Metric |
| emin |
|
MAX[9in, 15in - 0.5 * lp] | when Rc ≤ 120 kips | US Customary |
| emin |
|
MAX[230mm, 530mm - 0.5 * lp] | when 534 kN < Rc ≤ 1068 kN | Metric |
| emin |
|
MAX[9in, 21in - 0.5 * lp] | when 120 kips < Rc ≤ 240 kips | US Customary |
| emin |
|
MAX[230mm, 685mm - 0.5 * lp] | when 1068 kN < Rc ≤ 1779 kN | Metric |
| emin |
|
MAX[9in, 27in - 0.5 * lp] | when 240 kips < Rc ≤ 400 kips | US Customary |
| emin |
|
MAX[230mm, 760mm - 0.5 * lp] | when Rc > 1779 kN | Metric |
| emin |
|
MAX[9in, 30in - 0.5 * lp] | when Rc > 400 kips | US Customary |
| lp |
|
least width/diameter of the pile | ||
Check for minimum pile spacing
Check center to center spacing “s” between piles “i” and “j” in a pile group:
The check passes if:
If sij > min(smin , smin,user)
where
smin,user = user input
smin = max (least width of the pile + 0.6m , 0.9m) for metric units
smin = max (least width of the pile + 2ft. , 3 ft) for US customary units1
Check for maximum pile spacing
Check center to center maximum spacing “s” between piles “i” and “j” in a pile group:
The check passes if:
If sij < smax,user
smax,user = user input
Other checks
The remaining checks are identical to those for pad bases.
See: Pad Base and Strip Footing Design - Checks for limiting parameters (pad and strip base: ACI 318).
1 CRSI – Design handbook page 13-18