Pad Footing Capacity

This tool calculates the soil bearing, concrete flexure, and concrete shear capacity of an isolated pad or spread footing

Input:

kip
kip
ksf
ksf
in
in
ft
ft
in
in
ksi
ksi
BfBfLfLfxxyytftf

Output:

    Definitions
    • D: Dead Load (kip)
    • L: Live Load (kip)
    • qa: Allowable Bearing Capacity (ksf)
    • qu: Ultimate Bearing Capacity (ksf)
    • bcol: Column width (in)
    • hcol: Column depth (in)
    • bf: Footing width (ft)
    • Lf: Footing length (ft)
    • tf: Footing thickness (in)
    • fc: Concrete strength (ksi)
    • fy: Reinforcing strength (ksi)
    Calculate Design Loads
    Pf = 2952.5 kip, Ps = 2260 kip
    Geometric Properties
    Soil Bearing
    Usoil = 95% (Qsls = 95%, Quls = 85%)
    Concrete Bearing
    Ubearing = 82%
    Punching Shear
    Upunching = 55%
    One Way Shear (x)
    Ushear = 87%
    One Way Shear (y)
    Ushear = 96%
    Flexure (x)
    Using 21-25M9.5 --- Uflexure = 78%
    Flexure (y)
    Using 18-25M11.5 --- Uflexure = 86%
    User Notes: