Inputs
0 = use code minimum
Design notes (ACI 318)
- Minimum thickness from ACI 318 Table 7.3.1.1 (fy=420 MPa); adjust for other fy by 0.4+fy/700.
- Wu = 1.2·(SW + SDL) + 1.6·LL. Mu ≈ Wu·L²/8 (simple) or coefficient method.
- ρmin = max(1.4/fy, 0.0018·420/fy). ρmax = 0.75·ρb (tension-controlled approach).
- Spacing limit: s ≤ min(3h, 450 mm); shrinkage steel: As = 0.0018·b·h.
Results
Min Thickness h_min—
Adopted h—
Effective Depth d—
Wu (factored)—
Mu—
As required (per m)—
Bar Spacing—
Shrinkage As (per m)—