Crack for Pure Bending Moment

Canadian Codes

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MPa f_y = Material f^'_c = MPa

Crack for Section under Pure Bending Moment

M = kN.m Loading

v = mm Bottom Rebars A_sb = A_s = mm² mm²

b = mm h = Dimensions mm

Results Z = f_c / f'_c = N/mm %

Review Report

1. Limit Z for beams (w = 0.33mm, 0.4mm)
    a). Exterior exposure: [Z] = 25,000 N/mm
    b). Interior exposure: [Z] = 30,000 N/mm

2. Limit Z for slabs
    a). Exterior exposure: [Z] = 22,000 N/mm
    b). Interior exposure: [Z] = 27,000 N/mm

3. For epoxy coated reinforcement, Z = 1.2[Z]

4. Skin Reinforcement:

    a). A_sk = 0.008 (or 0.01)A_cs
     A_cs - the area of concrete in strips along the exposed side faces
    b). Max. spacing = 200mm