... .trusss section:300x300mm,etc 4.wedding roof truss,lighting truss square screw truss system detail: Truss Material: Aluminium6061-T6 or ... Brace tube:(diameter*thickness) 25mmx3mmConnection Mode: Bolt connectionTruss section Shape: square, triangle, layer,circle ,etc.Application:We can design diverse shapes ... ,speaker truss,LED truss,scaffolding,DJ flight case,aluminum bar desk,scaffolding,and so on.