Wheelbarrow frames, brackets, barrel skids, pedestrian barriers, crush barriers, cargo trays, stillages, pallets, cages, crates, vehicle lifting frames, cradles, handles, cattle pens and cowstall divisions, clothes posts, cloakroom frames, down rods for electric fans, gates, goal posts, machine guards, grids for sewage and cattle, standards for hand railing, ladders, point rods, pickets and picket pegs, racks, step irons, strainer screw bodies, turnbuckle bodies, trestles, tripods and wheels not being parts of machinery, all being goods made wholly or predominately of tubular steel; building frames, bridges (iron), columns for building, gantries, grandstand frames, house shafts, aeroplane hangar frames, hut frames, jigs for building, pylons, shelters and shelter frames, purlins and roof trusses for agricultural purposes and scaffolding all being goods used in building or engineering,