31458648[trusses by form]PT2026-03-30 21:03:27BT31440102trussesPTNT31472446bowstring trussesPTNT31472453Burr arch trussesPTNT31472456crescent trussesPTNT31472463Fink trussesPTNT31472471king-post trussesPTNT31472475queen-post trussesPTNT31472482scissors trussesPTNT31472487Town lattice trussesPTNT31472494hammer-beam trussesPTNT31472501Vierendeel trussesPT