how we can make pre engineering beam as a composite beam in stad

A composite beam in STAAD is always made up of a steel beam with a concrete slab or deck on top. What you are looking for is possibly built up tapered beams constructed by welding plates. You may use the Tapered I option ( Properties - Whole Structure > Define > Tapered I ) for that.

A composite beam in STAAD is always made up of a steel beam with a concrete slab or deck on top. What you are looking for is possibly built up tapered beams constructed by welding plates. You may use the Tapered I option ( Properties - Whole Structure > Define > Tapered I ) for that.

I got it, sir.I did the same by using tapered beam option.but as for the hot-rolled section we get the composite section. For a built-up beam how we can make it composite?