Boat crane sizer

Parametric sizer for a simple boat crane: mast + boom + diagonal strut. Enter the variables, get reactions and internal forces.

Sizing tool, not a certification tool. Verify independently before building anything that people stand under.

Geometry Mast height H in Strut on mast H_B in Boom length L in Strut on boom S in Outer tube length L_outer in Overlap lap in Boom angle θ deg

Load Load W lbf Dynamic factor η

Connection (gusset-pin) Pin dia D in Boom plate t_b in Mast plate t_m in

weak link: —

Click a member for its FBD + shear & moment diagrams.