https://www.menards.com/main/doors-windows-millwork/garage-doors-garage-door-openers/garage-door-parts-accessories/ideal-door-reg-2-x-16-ft-steel-horizontal-garage-door-support-strut/p-1444433865176.htm
開門器拉動的軸固定在原strut上的,原strut強度不夠也拉彎了一些。非標7x15門暫用幾年吧
insualtion的門兩麵鐵皮質量會好些,給大家推薦一下。