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 (SI/Metric Units) This calculator is useful for doubly reinforced rectangular concrete beam with two layers of tension re-bar. It uses SI/Metric system of 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 as well as balanced steel area required for a balanced section and the area or steel provided in the section.

Please enter the values in the appropriate units (SI/Metric) mentioned in the form given below and start calculations.

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

OUTPUT RESULTS
Min. Area of Steel (sq mm)=
Balanced Steel Area (sq mm)=
Area of Tension Steel (sq mm)=
Strength of Beam in Tension:T (MPa)=
Beta 1 (Whitney's coefficient)=
'a' value (stress block depth) (mm)=
'X' value (neutral axis depth) (mm)=
Area of compr. Steel (sq mm)=
Force of Compr. Steel:Cs (MPa)=
Force of compr. Concrete:Cc (MPa)=
Total Force of Compr. Cc+Cs (MPa)=
Nominal Moment, Mn (kNm)=
Yield strain of Steel =
Strain in compr. steel =
Strain in bottom layer of rebar =
Strain in second layer of rebar =

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