The footing acts as a cantilever beam loaded upward by the soil pressure. The spreadsheet calculates the required area of steel rebar ( Ascap A sub s ) using standard flexural equations.
Users might treat it as a "black box" without understanding the underlying mechanics .
qmax/min=PtotalL×W±6MW×L2q sub m a x / m i n end-sub equals the fraction with numerator cap P sub t o t a l end-sub and denominator cap L cross cap W end-fraction plus or minus the fraction with numerator 6 cap M and denominator cap W cross cap L squared end-fraction If
The footing acts as a cantilever beam loaded upward by the soil pressure. The spreadsheet calculates the required area of steel rebar ( Ascap A sub s ) using standard flexural equations.
Users might treat it as a "black box" without understanding the underlying mechanics .
qmax/min=PtotalL×W±6MW×L2q sub m a x / m i n end-sub equals the fraction with numerator cap P sub t o t a l end-sub and denominator cap L cross cap W end-fraction plus or minus the fraction with numerator 6 cap M and denominator cap W cross cap L squared end-fraction If