#### Calculator for Design of one-way Reinforced Concrete Slab with both ends simple supported (FPS/US Customary Units)

This calculator is useful for design of one way solid slab simply supported on both ends. This calculator assumes normal weight concrete and uses FPS/US Customary Units. It uses Strength Design method as per ACI 318 code of American Concrete Institute.

Effective depth is measured from the top edge to the centroid of tension rebar. This calculator uses the concept of Whitney's stress block and measures the depth of stress block "a" from the top edge. The user of this calculator is advised to comply with ACI guidelines for beam thickness, rebar spacing and cover etc.

This calculator also determines the minimum area of tension rebar required for crack control and balanced steel area required for a balanced section. The calculator also determine the value of Rn (strength coefficient of resistance). This calculator uses 35% of balanced rebar area as the steel area for design of slab. If Steel grade 60 is to be used, the minimum slab thickness is taken as L/20 where L is the span of slab. If the steel grade is other than 60 ksi, this value of minimum thickness is multiplied by a factor (0.4 + 0.01 fy) where fy is in ksi.

Please enter the values in the appropriate units mentioned in the form given below and start calculations.

INPUT VALUES
Span of Slab (ft.):
Comp. Strength of Conc f '_c (ksi):
Yield stress of Main steel f_y (ksi):
the values are entered

OUTPUT RESULTS
Min. Slab thickness required (in.)=
Balanced rebar ratio =
Rho required-1 =
R_n max (ksi)=
Ratio m ()=
R_n required (ksi)=
R_n required-2 (ksi)=
Comp. Strength of Conc f '_c (ksi):=
Yield stress of Main steel f_y (ksi):=
Option 1: #4 Rebar
Balanced Steel Area (sq in)=
Min. Steel Area required (sq in.)=
Depth to be provided (in.)=
Slab thickness to be provided (in.)=
Design Moment, M_u (ft-kip)=
Main Rebar area required for #4 bar(in2)=
Main rebar Spacing of #4 rebar (in)=
Distr. rebar area required for #3 bar(in2)=
Distr. rebar Spacing of #3 bar (in)=
Option 2: #5 Rebar
Balanced Steel Area (sq in.)=
Min. Steel Area required (sq in.)=
Depth to be provided (in.)=
Slab thickness to be provided (in.)=
Design Moment, M_u (ft-kip)=
Main Rebar area required for #5 bar(in^2)=
Main rebar Spacing of #5 rebar (in)=
Distr. rebar area required for #3 bar (in^2)=
Distr. rebar Spacing of #3 bar (in.)=
Please Select the option suitable to you

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