Continuous beam result
T-beam: bf=48.0, bw=14.0, hf=6.0
14.0 × 28.0 in
4-#9
f′c 4000 psi
fy 60.0 ksi
d 25.56 in
3 spans
PASS
All 7 critical sections pass: flexure, shear, crack control, deflection.
Input summary
| Span | L (ft) | wD (klf) | wL (klf) |
|---|---|---|---|
| Span 1 | 18.0 | 2.0 | 1.5 |
| Span 2 | 24.0 | 2.0 | 1.5 |
| Span 3 | 18.0 | 2.0 | 1.5 |
Supports: pin (left), pin (right); interior: continuous (pinned)
Moment and shear envelopes
8 load patterns analyzed per ACI 6.4.2.
Critical sections
| Location | Mu (kip-ft) | Vu (kip) | Type | Status |
|---|---|---|---|---|
| Span 1 midspan | 130.0 | 6.0 | T | PASS |
| Span 1 right support | 231.4 | 45.8 | rectangular | PASS |
| Span 2 midspan | 159.6 | 2.4 | T | PASS |
| Span 2 left support | 231.4 | 49.8 | rectangular | PASS |
| Span 2 right support | 231.4 | 49.8 | rectangular | PASS |
| Span 3 midspan | 130.0 | 6.0 | T | PASS |
| Span 3 left support | 231.4 | 45.8 | rectangular | PASS |
Span 1 midspan PASS
Section type: T (positive moment, flange in compression)
D/C moment
0.29
- φMn (kip-ft)
- 446.9
- Mu (kip-ft)
- 130.0
D/C shear
0.09
- φVn (kip)
- 65.6
- Vu (kip)
- 6.0
Crack control:
PASS
Span 1 right support PASS
Section type: rectangular (negative moment, rectangular)
D/C moment
0.56
- φMn (kip-ft)
- 414.7
- Mu (kip-ft)
- 231.4
D/C shear
0.70
- φVn (kip)
- 65.6
- Vu (kip)
- 45.8
Crack control:
PASS
Span 2 midspan PASS
Section type: T (positive moment, flange in compression)
D/C moment
0.36
- φMn (kip-ft)
- 446.9
- Mu (kip-ft)
- 159.6
D/C shear
0.04
- φVn (kip)
- 65.6
- Vu (kip)
- 2.4
Crack control:
PASS
Span 2 left support PASS
Section type: rectangular (negative moment, rectangular)
D/C moment
0.56
- φMn (kip-ft)
- 414.7
- Mu (kip-ft)
- 231.4
D/C shear
0.76
- φVn (kip)
- 65.6
- Vu (kip)
- 49.8
Crack control:
PASS
Span 2 right support PASS
Section type: rectangular (negative moment, rectangular)
D/C moment
0.56
- φMn (kip-ft)
- 414.7
- Mu (kip-ft)
- 231.4
D/C shear
0.76
- φVn (kip)
- 65.6
- Vu (kip)
- 49.8
Crack control:
PASS
Span 3 midspan PASS
Section type: T (positive moment, flange in compression)
D/C moment
0.29
- φMn (kip-ft)
- 446.9
- Mu (kip-ft)
- 130.0
D/C shear
0.09
- φVn (kip)
- 65.6
- Vu (kip)
- 6.0
Crack control:
PASS
Span 3 left support PASS
Section type: rectangular (negative moment, rectangular)
D/C moment
0.56
- φMn (kip-ft)
- 414.7
- Mu (kip-ft)
- 231.4
D/C shear
0.70
- φVn (kip)
- 65.6
- Vu (kip)
- 45.8
Crack control:
PASS
Deflection
PASS| Span | Ie,avg (in4) | δD (in) | δL (in) | δLT (in) | L/δ | Status |
|---|---|---|---|---|---|---|
| span_1 | 35487 | 0.015 | 0.011 | 0.042 | 5124 | PASS |
| span_2 | 19259 | 0.043 | 0.032 | 0.118 | 2435 | PASS |
| span_3 | 35487 | 0.015 | 0.011 | 0.042 | 5124 | PASS |
Weighted-average Ie per ACI 435.3R-68 (0.70·Ie,mid + 0.15·(Ie,left + Ie,right)); Bischoff Ie per ACI 24.2.3.5.
Calculated 2026-10-25 · ACI 318-19