MN73屋(wu)面系統(tong)可通過(guo)屋(wu)面板的(de)自由滑動釋放熱脹冷縮產生的(de)形變(bian)。系統(tong)設(she)計時一般將屋(wu)面板在屋(wu)檐(yan)處固(gu)定，屋(wu)脊(ji)處自由伸縮，使該形變(bian)既不(bu)影響建(jian)筑功能，又不(bu)破壞(huai)建(jian)筑外觀(guan)。
美耐建筑自(zi)(zi)主研發的滑(hua)(hua)(hua)動(dong)支(zhi)架(jia)是連(lian)(lian)接(jie)屋(wu)(wu)面(mian)(mian)板和結構(gou)件、且實現屋(wu)(wu)面(mian)(mian)板自(zi)(zi)由滑(hua)(hua)(hua)動(dong)的關(guan)鍵。一方面(mian)(mian)，可(ke)(ke)(ke)滑(hua)(hua)(hua)動(dong)式(shi)連(lian)(lian)接(jie)件可(ke)(ke)(ke)同(tong)時(shi)承載屋(wu)(wu)面(mian)(mian)上(shang)的雪壓和人行壓力(li)，也(ye)可(ke)(ke)(ke)以拉(la)緊屋(wu)(wu)面(mian)(mian)，避(bi)(bi)免被風掀起。另一方面(mian)(mian)，連(lian)(lian)接(jie)件的可(ke)(ke)(ke)滑(hua)(hua)(hua)動(dong)性能可(ke)(ke)(ke)以使屋(wu)(wu)面(mian)(mian)板自(zi)(zi)由滑(hua)(hua)(hua)動(dong)，從而(er)釋(shi)放熱應力(li)，避(bi)(bi)免連(lian)(lian)接(jie)破壞。同(tong)時(shi)，檁條(tiao)預沖孔(kong)技術(shu)也(ye)確保了數(shu)量眾多的連(lian)(lian)接(jie)件在一條(tiao)直線上(shang)順暢滑(hua)(hua)(hua)動(dong)。
此外，在高低跨處(chu)、屋(wu)面開(kai)口等節(jie)點處(chu)，屋(wu)面的(de)熱脹冷縮也得到(dao)了妥善處(chu)理。
