Structural Design
Choose a structure type and enter the loads to get design forces.
Nos of Span (2 to 5)
Beam Span (each span)mBeam Stiffness (optional)kNm²
Point LoadkNm
UDL LoadkN/mmm
Enter N (2 to 5) to show the span inputs.
Span 1 Point LoadkNm
Span 2 Point LoadkNm
Span 3 Point LoadkNm
Span 4 Point LoadkNm
Span 5 Point LoadkNm
UDL Load (full span)kN/m
Output
Max Hogging MomentMhog =kNmMax Sagging MomentMsag =kNm
Max Shear ForceVmax =kN
Max Deflectionδmax =mm
Enter EI to calculate deflection values. The diagram shows the deflected shape only.
Results at a Station
Output Station (from left end)m
At Station yMy =kNmVy =kNδy =mm
All load patterns
Method and sign convention
Closed-form equations (for checking)
Slab Spanmm
Thickness & Material (E optional)mmMPa
UDL LoadkN/m²
Varying Load (q₁ at x = 0, q₂ at x = a)kN/m²kN/m²
Point LoadkNmm
Load Patch Size (optional, default h)mm
a is the span in the x direction and b in the y direction. x and y are measured from the left and bottom edges. Moments are per metre width.
Output
Moment MxMsag =kNm/mMhog =kNm/m
Moment MyMsag =kNm/mMhog =kNm/m
Max Deflectionδmax =mm
Enter E to calculate deflection.
Results at a Station
Output Station (blank = slab centre)mm
At StationMx =kNm/mMy =kNm/mδ =mm