MN73屋(wu)面系統可(ke)通過屋(wu)面板的自(zi)(zi)由滑動釋放熱脹冷(leng)縮產生(sheng)的形(xing)變。系統設(she)計時一般將屋(wu)面板在屋(wu)檐處固(gu)定，屋(wu)脊處自(zi)(zi)由伸縮，使該形(xing)變既不(bu)影響建(jian)(jian)筑功能(neng)，又不(bu)破壞建(jian)(jian)筑外觀。
美耐建筑自主研發的滑(hua)動(dong)(dong)(dong)(dong)支架是連(lian)接屋(wu)面(mian)(mian)板和結構件、且實現(xian)屋(wu)面(mian)(mian)板自由(you)滑(hua)動(dong)(dong)(dong)(dong)的關鍵。一(yi)方面(mian)(mian)，可(ke)(ke)(ke)滑(hua)動(dong)(dong)(dong)(dong)式連(lian)接件可(ke)(ke)(ke)同時承(cheng)載屋(wu)面(mian)(mian)上的雪壓和人行壓力(li)，也(ye)可(ke)(ke)(ke)以拉緊屋(wu)面(mian)(mian)，避(bi)免被風掀(xian)起。另一(yi)方面(mian)(mian)，連(lian)接件的可(ke)(ke)(ke)滑(hua)動(dong)(dong)(dong)(dong)性(xing)能可(ke)(ke)(ke)以使屋(wu)面(mian)(mian)板自由(you)滑(hua)動(dong)(dong)(dong)(dong)，從而釋放(fang)熱應力(li)，避(bi)免連(lian)接破壞。同時，檁條預沖孔技(ji)術也(ye)確保了數量眾多的連(lian)接件在一(yi)條直線上順暢滑(hua)動(dong)(dong)(dong)(dong)。
此外，在高低跨處、屋(wu)面開口等節點處，屋(wu)面的(de)熱脹冷縮也得到了妥善處理(li)。
