CSA A23.3-24 Slab Design

Concrete Design Handbook · one-way, two-way, flat plate & flat slab checks

Governing: Total deflection · Cl. Table 9.3 · 1.25INADEQUATE

Project information

Appears on the printed calculation sheet

Materials & resistance factors

CSA A23.3-24 Cl. 8.4 · 8.5 · 8.6

Ec (Cl. 8.6.2)26,621MPa
fr (Cl. 8.6.4)3.286MPa
α1 (Cl. 10.1.7)0.805
β1 (Cl. 10.1.7)0.895

Slab configuration

Cl. 9.8 · 13.2 — system and exposure

Geometry

Spans, thickness and reinforcement layout

d bottom167.5mm
d top167.5mm
d average167.5mm

Loading

Specified (service) loads · factored per NBCC 1.25D + 1.5L

Self-weight wsw4.71kN/m²
Total dead wdl6.21kN/m²
Factored dead 1.25D7.76kN/m²
Factored live 1.5L3.60kN/m²
Total factored wf11.361kN/m²

Column & punching shear

Cl. 13.3 — concentrated load transfer

Factored shear Vf = wf · At409.00kN

Section views

Plan, section, elevation and critical sections

⌀15 @ 200⌀15 @ 200h = 200cc 25d = 167.51000 mm design strip

Cross-section · slab depth, cover, effective depth and bar positions

Drawings are schematic and scale with the current input.

Live checks

Updates as you type

Minimum thickness180.0 mm / 200.0 mm
0.90
Flexure — CS Int. Neg.805 mm²/m / 884 mm²/m
0.91
Flexure — CS Positive533 mm²/m / 884 mm²/m
0.60
Flexure — CS Ext. Neg.400 mm²/m / 884 mm²/m
0.45
Flexure — MS Int. Neg.400 mm²/m / 884 mm²/m
0.45
Flexure — MS Positive400 mm²/m / 884 mm²/m
0.45
Punching shear1.348 MPa / 1.353 MPa
1.00
Flexure (Mr ≥ Mf)20.71 kN·m/m / 47.44 kN·m/m
0.44
Ductility (c/d)0.128 / 0.636
0.20
One-way shear30.67 kN/m / 112.71 kN/m
0.27
Crack control (z)18,009 N/mm / 30,000 N/mm
0.60
Bar spacing200 mm / 500 mm
0.40
Total deflection28.02 mm / 22.50 mm
1.25
Immediate live-load deflection3.20 mm / 15.00 mm
0.21

Punching shear

Cl. 13.3

PASS ✓
vf = 1.348 MPa · vc = 1.353 MPa
1.00