青冶正星為(wei)您介(jie)紹L 型鋼(gang)。L型鋼(gang)俗稱角(jiao)(jiao)(jiao)鋼(gang)、角(jiao)(jiao)(jiao)鐵，角(jiao)(jiao)(jiao)鋼(gang)(Angle steel)是兩邊(bian)(bian)互相(xiang)垂(chui)直成角(jiao)(jiao)(jiao)形(xing)的長條鋼(gang)材。根據(ju)邊(bian)(bian)長不(bu)同(tong)分(fen)為(wei)等(deng)(deng)邊(bian)(bian)角(jiao)(jiao)(jiao)鋼(gang)和(he)不(bu)等(deng)(deng)邊(bian)(bian)角(jiao)(jiao)(jiao)鋼(gang)，根據(ju)角(jiao)(jiao)(jiao)鋼(gang)角(jiao)(jiao)(jiao)部不(bu)同(tong)又有(you)外圓角(jiao)(jiao)(jiao)和(he)外直角(jiao)(jiao)(jiao)角(jiao)(jiao)(jiao)鋼(gang)之分(fen)。等(deng)(deng)邊(bian)(bian)角(jiao)(jiao)(jiao)鋼(gang)的兩個邊(bian)(bian)寬相(xiang)等(deng)(deng)，其規格以(yi)邊(bian)(bian)寬×邊(bian)(bian)寬×邊(bian)(bian)厚…

1.成(cheng)都鋼(gang)結構的防火(huo)保護。盡管鋼(gang)結構具(ju)有許多(duo)優點，但(dan)剛才的常(chang)溫(wen)熱(re)導率(lv)高達58.2W/(m·K)，升溫(wen)或遇(yu)火(huo)時(shi)熱(re)導率(lv)更高，因而(er)傳熱(re)速(su)度(du)，遇(yu)火(huo)或遇(yu)熱(re)溫(wen)度(du)達到500℃左(zuo)右(you)時(shi)，其彈(dan)性(xing)模量、屈服強度(du)和極限強度(du)均(jun)顯(xian)著降低，應變急劇增(zeng)大(da)，致(zhi)使其迅(xun)速(su)扭曲(qu)變…