MN73屋(wu)面系統(tong)(tong)可通過屋(wu)面板的自由(you)(you)滑(hua)動釋放熱脹(zhang)冷縮產生(sheng)的形變。系統(tong)(tong)設計(ji)時一般(ban)將屋(wu)面板在屋(wu)檐處固定，屋(wu)脊處自由(you)(you)伸(shen)縮，使該形變既不影響建(jian)筑(zhu)功能，又不破壞(huai)建(jian)筑(zhu)外觀。
美耐(nai)建筑自(zi)主研發的滑動(dong)支架是連(lian)(lian)(lian)接屋(wu)(wu)面(mian)(mian)(mian)(mian)板(ban)和(he)結構件(jian)、且實現屋(wu)(wu)面(mian)(mian)(mian)(mian)板(ban)自(zi)由(you)滑動(dong)的關鍵。一方面(mian)(mian)(mian)(mian)，可滑動(dong)式連(lian)(lian)(lian)接件(jian)可同時承載屋(wu)(wu)面(mian)(mian)(mian)(mian)上(shang)(shang)的雪壓(ya)(ya)和(he)人行壓(ya)(ya)力(li)，也可以(yi)拉緊屋(wu)(wu)面(mian)(mian)(mian)(mian)，避(bi)(bi)免被(bei)風掀起。另一方面(mian)(mian)(mian)(mian)，連(lian)(lian)(lian)接件(jian)的可滑動(dong)性能可以(yi)使屋(wu)(wu)面(mian)(mian)(mian)(mian)板(ban)自(zi)由(you)滑動(dong)，從而(er)釋放熱應(ying)力(li)，避(bi)(bi)免連(lian)(lian)(lian)接破壞。同時，檁(lin)條預沖孔技術(shu)也確保了數量眾(zhong)多的連(lian)(lian)(lian)接件(jian)在(zai)一條直(zhi)線上(shang)(shang)順暢滑動(dong)。
此外，在(zai)高低跨處、屋面(mian)開口等(deng)節點處，屋面(mian)的熱(re)脹(zhang)冷縮也(ye)得到了妥善處理。
