Design corbels and brackets for vertical loads and horizontal tension using shear-friction method. Use for short cantilever brackets supporting precast beams or crane rails. Compliant with ACI 318-19 §16.5. Free to use. SI and Imperial units supported. No signup required.
Corbel Design
ACI 318-19 §16.5 — Bracket/corbel design
a/d CheckACI 318-19 §16.5.1
OKSteel ComponentsACI 318-19 §16.5
Computed| Step | Formula | Substitution | Result | |
|---|
| a/d | av/d | 200/350 | 0.57 | ✓ |
| Step | Formula | Substitution | Result | |
|---|
| Asf | friction steel | 454 | 454 mm² | |
| An | tension steel | 95 | 95 mm² | |
| Asc | flexure steel | 376 | 376 mm² | |
| Step | Formula | Substitution | Result | |
|---|
| As,req | As,req | 472 | 472 mm² | |
| As,prov | As | 800 | 800 mm² | ✓ |
| Ah,req | Ah,req | 188 | 188 mm² | |
| Ah,prov | Ah | 400 | 400 mm² | ✓ |
[1]
Corbel Design
ACI 318-19 §16
Project: N/A · Engineer: N/A · Date: 10/10/2026 · Rev: 0
[2]
Design reference: ACI 318-19 §16
[3]
Given:
Vu = 200 kN (Shear)
Nu = 30 kN (Tension)
av = 200 mm (Shear span)
d = 350 mm (Depth)
[4]
Material Properties:
Steel
fy = 420 MPa
As = 800 mm²
Ah = 400 mm²
[5]
a/d Check
ACI 16.5.1
a/d = av/d
= 200/350
= 0.57
[6]
Steel Components
ACI 318-19 §16
Asf = friction steel
= 454
= 454 mm²
An = tension steel
= 95
= 95 mm²
Asc = flexure steel
= 376
= 376 mm²
[7]
Required Steel
ACI 318-19 §16