Precast Rib Beam Design
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India Pavilion at World Expo 2010, Shangai, China
Precast Rib Beam
Design of Reinforced Concrete beam (Ribbed Beam) Beam Mark : Design : Grade of Concrete (N/mm2) : Grade of main Steel (N/mm2) : Grade of stirrups (N/mm2) : Effective span of beam (m) : Width of beam ((mm)) : Depth of beam (mm) : Clear cover to main reinforcement (mm) : End A 4.50 29.00
Factored bending moments (kN-m) : Factored shear force (kN) : Effective depth of section (mm) : Xu lim (mm) : Xu,lim Mu,lim (kN-m) : Depth of Neutral Axis (mm) :
Arrangement of Steel : Tensile Reinforcement : Diameter of bar (mm) : No. of bars : p Reinforcement : Compression Diameter of bar (mm) : No. of bars : Check for Shear : Design shear stress (N/mm2) : Shear strength (N/mm2) : Zone of Design shear stirrups : No. : N off llegs off stirrups ti Diameter of stirrups (mm) : Spacing of shear stirrups (mm) : Distance of design stirrup from end (mm) :
End B 4.50 29.00
25.50 Singly Reinf 59.15 0.00 75.99
14.79
219.00 104 92 104.92 19.82 25.50 Singly Reinf 194.79 0.00 194.79 0.14 344.60 48.70
12 2
12 2
12 2
10 2
10 2
10 2
25.50 Singly Reinf 59.15 0.00 59.15
Area of tensile reinforcement Ast (mm2) : -Area of tensile reinforcement Ast (mm2) : Value of dc/deff : Stress at the level of compression steel (N/mm2) : Area of Compression reinforcement Asc (mm2) :
1.00 1 00 B1 As per IS : 456 - 2000 25 415 415 3.66 120 250 25 Span 13.50
0.94 0.61 2 8 150 0
Check for Deflection :
19.00
0.94 0.61 2 8 150 3540
2 8 150 0
Safe
Summary of Result Size of Beam (mm) : Tensile reinforcement : Compression reinforcement : Stirrups :
2 No - Y12 2 No - Y10 --
1
120 x 250 2 No - Y12 2 No - Y10 2-L Y8 @ 150c/c
2 No - Y12 2 No - Y10 --
Precast Rib Beam
Design of Reinforced Concrete beam (Ribbed Beam) Beam Mark : Design : Grade of Concrete (N/mm2) : Grade of main Steel (N/mm2) : Grade of stirrups (N/mm2) : Effective span of beam (m) : Width of beam ((mm)) : Depth of beam (mm) : Clear cover to main reinforcement (mm) : End A 4.50 29.00
Factored bending moments (kN-m) : Factored shear force (kN) : Effective depth of section (mm) : Xu lim (mm) : Xu,lim Mu,lim (kN-m) : Depth of Neutral Axis (mm) :
Arrangement of Steel : Tensile Reinforcement : Diameter of bar (mm) : No. of bars : p Reinforcement : Compression Diameter of bar (mm) : No. of bars : Check for Shear : Design shear stress (N/mm2) : Shear strength (N/mm2) : Zone of Design shear stirrups : No. : N off llegs off stirrups ti Diameter of stirrups (mm) : Spacing of shear stirrups (mm) : Distance of design stirrup from end (mm) :
End B 4.50 29.00
25.50 Singly Reinf 59.15 0.00 75.99
14.79
219.00 104 92 104.92 19.82 25.50 Singly Reinf 194.79 0.00 194.79 0.14 344.60 48.70
12 2
12 2
12 2
10 2
10 2
10 2
25.50 Singly Reinf 59.15 0.00 59.15
Area of tensile reinforcement Ast (mm2) : -Area of tensile reinforcement Ast (mm2) : Value of dc/deff : Stress at the level of compression steel (N/mm2) : Area of Compression reinforcement Asc (mm2) :
1.00 1 00 B1 As per IS : 456 - 2000 25 415 415 3.66 120 250 25 Span 13.50
0.94 0.61 2 8 150 0
Check for Deflection :
19.00
0.94 0.61 2 8 150 3540
2 8 150 0
Safe
Summary of Result Size of Beam (mm) : Tensile reinforcement : Compression reinforcement : Stirrups :
2 No - Y12 2 No - Y10 --
1
120 x 250 2 No - Y12 2 No - Y10 2-L Y8 @ 150c/c
2 No - Y12 2 No - Y10 --
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