Does anyone know of a good site which perhaps has a calculator on it for
determining the relative load bearing charastics of small (50mm x 50mm x
3mm) HRS and Equal Angle steel sections. I have some plans for a trailer
which shows using 50*50*5 equal angle and would like to know what
size/section of HRS would provide the equivilant load bearing and overall
strength charastics.

Tks John Allen