CE Calculators > Strength of Reinforced Concrete > Rectangular Beam with two layers of tension rebar

Calculator for Strength of Reinforced Concrete beam with two layers of tension rebar (FPS/US Customary Units)

Reinforced concrete beam

This calculator is useful for doubly reinforced rectangular concrete beam with two layers of tension re-bar. This calculator uses FPS/US Customary Units. You can also use it for singly reinforced section, just by entering compression rebar equal to zero.

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 in addition to the area of tension steel available in the section.

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

Width of beam (in.):
Effective Depth of beam (in.):
Compr. Strength of Conc. f '_c (ksi):
Yield stress of Tension Steel f_y (ksi):
No. of Rebar in Tension (nos.):
Dia of Rebar in Tension (in.):
Distance between rebar layers (in.):
Yield stress of Comp. Steel f '_y (ksi):
No. of Rebar in Compr. (nos.):
Dia. of Rebar in Compr. (in.):
Cover of Compr. steel (in.):
Please make sure that all
the values are entered

Min. Area of tension steel (sq in.)=
Balanced Steel area (sq in.)=
Area of Tension rebar (sq in.)=
Strength of Tension rebar (kip)=
Beta 1(Whitney's coefficient)=
'a' (depth of stress block) - (in.)=
'X' (depth of neutral axis) - (in.)=
Area of Compr. rebar (sq in.)=
Force of Compr. in rebar:Cs (kip)=
Force of compr. Conc.:Cc (kip)=
Total Force of Compr.:Cc+Cs (kip)=
Nominal Moment, Mn (ft-kip)=
Yield strain of steel =
Strain in compr. steel =
Strain in bottom layer of rebar =
Strain in second layer of rebar =

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