MN73屋(wu)面系(xi)(xi)統(tong)可通過屋(wu)面板的(de)(de)自由滑動釋放(fang)熱脹冷縮產(chan)生的(de)(de)形變。系(xi)(xi)統(tong)設(she)計時一(yi)般(ban)將屋(wu)面板在屋(wu)檐(yan)處固定，屋(wu)脊處自由伸縮，使該形變既不(bu)(bu)影響(xiang)建筑(zhu)功能，又(you)不(bu)(bu)破壞(huai)建筑(zhu)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)板(ban)(ban)和(he)結構件(jian)、且實(shi)現(xian)屋(wu)面(mian)板(ban)(ban)自由滑(hua)動(dong)(dong)(dong)(dong)的關鍵。一方面(mian)，可滑(hua)動(dong)(dong)(dong)(dong)式連(lian)接件(jian)可同時承載屋(wu)面(mian)上(shang)的雪(xue)壓和(he)人(ren)行壓力，也(ye)可以拉(la)緊屋(wu)面(mian)，避免被風(feng)掀(xian)起。另一方面(mian)，連(lian)接件(jian)的可滑(hua)動(dong)(dong)(dong)(dong)性能可以使屋(wu)面(mian)板(ban)(ban)自由滑(hua)動(dong)(dong)(dong)(dong)，從而釋放熱(re)應力，避免連(lian)接破壞。同時，檁條預(yu)沖孔(kong)技術也(ye)確(que)保(bao)了數(shu)量眾多的連(lian)接件(jian)在一條直線(xian)上(shang)順(shun)暢滑(hua)動(dong)(dong)(dong)(dong)。
此(ci)外(wai)，在高低跨處(chu)(chu)、屋面(mian)開口等節點處(chu)(chu)，屋面(mian)的熱(re)脹冷縮也得到了妥善處(chu)(chu)理。
