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Calculate Reinforcement For The Heel Of A Concrete Cantilever Retaining Wall:

Calculation:

Designer/Checker:

Input:

Metric Units

(Note: All input Metric units are converted to English units for the equations below and then the output English units are converted back to Metric)

Yield strength of the steel reinforcement, (fy - ksi or kPa)

(Use 40 ksi for Grade 40 or 48 ksi for Grade 60)

Concrete compressive strength, (f'c- psi or kPa)

Thickness of base (h - in or cm)

Distance from outside face of concrete to center of steel (Cvr - in or cm)

Distance to the soil vertical resultant (Ds - ft or m)

Vertical soil resultant on the heel (Rs - kip/ft or N/m)

Distance to the vertical concrete resultant (Dc - ft or m)

Vertical concrete resultant of the heel (Rc - kip/ft or N/m)

Distance to the resultant from soil surcharge load (Dss - ft or m)

Vertical resultant from soil surcharge load (Rss - ft or m)

Distance to the bearing pressure resultant (Dbp - ft or m)

Bearing pressure resultant on the heel (Rbp- kip/ft or N/m)

Output:

Ratio of stress block depth to effective depth, ku =

Area of steel required, As =

Shear capacity, 0.85Vc =

Shear force at distance d on stem, Vu =

Minimum reinforcement ratio, pmin =

Maximum reinforcement ratio, pmax =

Reinforcement ratio, p =

If pmin < p < pmax then ductility adequate.