Design status
IS 456:2000 section design · IRC:6-2017 loads
ULS-10 governs: LL6 leading, permanent relieving (min P, max ML); Pu = 4,375 kN, Md = 4,942 kN·m, M1 = 5,719 kN·m, UR = 0.86.
Pier section
Circular Ø 1,500 mm
Hp = 6.00 m · M30 / Fe500
Longitudinal steel
36 nos 25φ = 17,671 mm²
p = 1.00 % · ties 12φ @ 150
Max UR — P–M
0.864
ULS-10
Max UR — axial
0.217
ULS-3
Max UR — shear
0.252
ULS-10
Pier cap — flexure
0.678
Mu 5,599 / MR 8,264 kN·m
Pier cap — shear
0.700
Vu 3,012 / VR 4,303 kN
Footing bearing (info)
1.214
pmax 303.5 vs SBC 250 kN/m²
Governing UR per combination
Red line = 1.0 (capacity)
UR table
Per ULS / seismic combination
| Combo | Pu kN | P–M | Ax | V |
|---|---|---|---|---|
| ULS-1 | 5,809 | 0.678 | 0.216 | 0.219 |
| ULS-2 | 5,176 | 0.663 | 0.192 | 0.182 |
| ULS-3 | 5,830 | 0.796 | 0.217 | 0.243 |
| ULS-4 | 5,551 | 0.662 | 0.206 | 0.201 |
| ULS-5 | 5,767 | 0.716 | 0.214 | 0.219 |
| ULS-6 | 5,684 | 0.826 | 0.211 | 0.244 |
| ULS-7 | 5,527 | 0.812 | 0.205 | 0.244 |
| ULS-8 | 4,531 | 0.288 | 0.168 | 0.109 |
| ULS-9 | 3,222 | 0.305 | 0.120 | 0.113 |
| ULS-10 | 4,375 | 0.864 | 0.163 | 0.252 |
| ULS-11 | 5,479 | 0.708 | 0.204 | 0.229 |
| SEIS-1 | 4,701 | 0.629 | 0.175 | 0.240 |
| SEIS-2 | 4,701 | 0.583 | 0.175 | 0.217 |
| SEIS-3 | 3,222 | 0.614 | 0.120 | 0.232 |
| SEIS-4 | 3,222 | 0.578 | 0.120 | 0.217 |
Detailing
IS 456 Cl.26.5.3
- Minimum longitudinal steel ≥ 0.8 %1.0 ✓
- Maximum longitudinal steel ≤ 4 %1.0 ✓
- Minimum number of bars (6)36.0 ✓
- Bar diameter ≥ 12 mm25.0 ✓
- Peripheral bar spacing ≤ 300 mm117.9 ✓
- Clear spacing ≥ max(φ, 25 mm)92.9 ✓
- Tie diameter ≥ max(φ/4, 6 mm)12.0 ✓
- Tie pitch ≤ min(least dim, 16φ, 300)150.0 ✓
- Clear cover ≥ 40 mm50.0 ✓