Manual beam design

1. 1. Data
L = 3000mm
Deadload = 6kN/m
Live load= 8kN/m
Finishedload=0.75kN/m
Wall support= 230mm
Concrete grade = M20
Steel grade,fe = 415
2. Effective spanof beam
Effective span=c/c of support= 3230mm
3. Size of beam
Effective depth=span/12= 3230/12 = 269.16mm, say270mm
Breadth= ½ d = ½ (270) = 135mm
Clearcover= 25mm. use 16mm Ø
D = 270 + 25 + 16/2 = 303mm, say310mm
D = 310mm
d = 310 – 25 – 16/2 = 277mm, say 280mm