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Core States Group <br />4240 E. Jurupa St. Suite 402 <br />Ontario, CA 91761 <br />Storage Rack Date: 2/18/2022 <br /> Calculations By: DZ <br />Connection to Existing Slab: <br />f'c 2500psi:=Assumed( )Minimum Concrete Stength: <br />Thickness of Concrete Slab: tc 4.0in:= <br />Allowable Soil Bearing Pressure:fsoil 500psf:= <br />dbase 0.75in:=Factored Bearing Loads From Post:Pmax Pu 461.2 lbf=:= <br />Required Bearing Area:Areq <br />Pmax <br />fsoil <br /> <br />132.8 in2=:=I Areq 11.5 in=:= <br />dcrit <br />I <br />2 <br /> <br /> <br />d base <br />2 <br /> <br /> <br />- <br />tc <br />2 <br />-3.4 in=:=Critical Section: <br />ws <br />Pmax <br />Areq <br /> <br />12in 500 plf=:=Soil Pressure on Crit. Section: <br />bo 4 tc dbase+( )19 in=:=Shear Perimeter: <br />S 12in <br />tc <br />2 <br />6 <br /> <br /> <br /> <br /> <br /> <br />32 in3=:=Plain Concrete Section Modulus: <br />Shear Stress: <br />Two Way Punching Shear <br />fv <br />Pmax <br />bo tc <br /> <br />6.1 psi=:= <br />Bending Stress:fb <br />ws dcrit <br />2 <br />2 S <br />7.5 psi=:= <br />Nominal Shear Capacity:ϕFv 0.55 2.66f'c psi73.2 psi=:= <br />Nominal Moment Capacity:ϕFb 0.55 5f'c psi137.5psi=:= <br />if fv ϕFv<"Shear Strength OK", "Shear Not Adequate", ()"Shear Strength OK"= <br />if fb ϕFb<"Bending Strength OK", "Bending Not Adequate", ()"Bending Strength OK"= <br />Existing concrete floor slab is adequate to support the required bearing forces. <br />110 E 1st St - <br />1011174736/10/2024