首先，在鋼結構(gou)樓層板(ban)(ban)(ban)(ban)(ban)(ban)中要(yao)(yao)(yao)達到耐(nai)火(huo)(huo)1.5小(xiao)時(shi)，總的來說可(ke)以選擇開(kai)(kai)(kai)口(kou)(kou)(kou)板(ban)(ban)(ban)(ban)(ban)(ban)、縮口(kou)(kou)(kou)板(ban)(ban)(ban)(ban)(ban)(ban)、閉(bi)口(kou)(kou)(kou)板(ban)(ban)(ban)(ban)(ban)(ban)三大類。規范上混凝土要(yao)(yao)(yao)高于開(kai)(kai)(kai)口(kou)(kou)(kou)板(ban)(ban)(ban)(ban)(ban)(ban)肋頂之(zhi)上80mm，并且板(ban)(ban)(ban)(ban)(ban)(ban)底需配置(zhi)板(ban)(ban)(ban)(ban)(ban)(ban)底受(shou)力筋。還有一種就是再開(kai)(kai)(kai)口(kou)(kou)(kou)板(ban)(ban)(ban)(ban)(ban)(ban)底部(bu)刷防火(huo)(huo)涂料(liao)，涂料(liao)厚度大于等于15,這樣的話，只要(yao)(yao)(yao)達到構(gou)造要(yao)(yao)(yao)求高于肋頂5公分(fen)就可(ke)以了。而縮口(kou)(kou)(kou)板(ban)(ban)(ban)(ban)(ban)(ban)和閉(bi)口(kou)(kou)(kou)板(ban)(ban)(ban)(ban)(ban)(ban)，只需要(yao)(yao)(yao)總的樓板(ban)(ban)(ban)(ban)(ban)(ban)厚度大于等于110即可(ke)，但是縮口(kou)(kou)(kou)板(ban)(ban)(ban)(ban)(ban)(ban)雖然在防火(huo)(huo)方面比開(kai)(kai)(kai)口(kou)(kou)(kou)板(ban)(ban)(ban)(ban)(ban)(ban)要(yao)(yao)(yao)好。但是底部(bu)還是需要(yao)(yao)(yao)加板(ban)(ban)(ban)(ban)(ban)(ban)底受(shou)力筋，而閉(bi)口(kou)(kou)(kou)板(ban)(ban)(ban)(ban)(ban)(ban)則不需要(yao)(yao)(yao)。

熱鍍鋅鋼管批發熱鍍鋅生產發展一直處于滯后狀態。20世紀50年代到60年代陸續建成了13條單張鋼板熔劑法熱鍍鋅機組，能力為10萬t/a，但因產量低、成本高、質量差、污染環境、經濟效益差等缺陷已先后停、轉產。從20世紀70年代末，我國才開始建造大型寬帶熱鍍鋅機組。河北熱鍍鋅鋼管熱鍍(du)鋅(xin)帶(dai)鋼在我國(guo)(guo)市場一直是緊(jin)缺品種。從(cong)20世紀90年代中期以來，每年都(dou)要從(cong)國(guo)(guo)外進口(kou)80-100萬t左右。隨(sui)著國(guo)(guo)內經濟的發(fa)展，尤其(qi)是汽(qi)車(che)、家電及建筑業的發(fa)展，對鍍(du)鋅(xin)帶(dai)鋼的需求量也(ye)大大增加。

鍍(du)鋅板使(shi)用(yong)(yong)的時候，自(zi)然(ran)也是(shi)(shi)要(yao)讓它(ta)在(zai)(zai)(zai)質(zhi)量(liang)上面(mian)(mian)(mian)達(da)(da)到(dao)很(hen)(hen)好的表(biao)現(xian)(xian)，但是(shi)(shi)對于它(ta)在(zai)(zai)(zai)自(zi)己(ji)(ji)(ji)的質(zhi)量(liang)表(biao)現(xian)(xian)表(biao)現(xian)(xian)來說，往(wang)往(wang)是(shi)(shi)有(you)(you)(you)很(hen)(hen)多方(fang)面(mian)(mian)(mian)的，那么它(ta)在(zai)(zai)(zai)自(zi)己(ji)(ji)(ji)的質(zhi)量(liang)上面(mian)(mian)(mian)都是(shi)(shi)有(you)(you)(you)什(shen)么表(biao)現(xian)(xian)呢(ni)？首先一(yi)個方(fang)面(mian)(mian)(mian)，就(jiu)是(shi)(shi)它(ta)在(zai)(zai)(zai)自(zi)己(ji)(ji)(ji)的表(biao)面(mian)(mian)(mian)上要(yao)達(da)(da)到(dao)平的要(yao)求，這(zhe)一(yi)點自(zi)然(ran)也是(shi)(shi)它(ta)在(zai)(zai)(zai)自(zi)己(ji)(ji)(ji)使(shi)用(yong)(yong)時的一(yi)個重要(yao)的表(biao)現(xian)(xian)，現(xian)(xian)在(zai)(zai)(zai)也一(yi)些廠家，他們在(zai)(zai)(zai)生產時，因(yin)為沒(mei)有(you)(you)(you)使(shi)用(yong)(yong)很(hen)(hen)好的設備，也或者是(shi)(shi)在(zai)(zai)(zai)技術上面(mian)(mian)(mian)低下，自(zi)然(ran)就(jiu)沒(mei)有(you)(you)(you)這(zhe)方(fang)面(mian)(mian)(mian)的表(biao)現(xian)(xian)。重慶鍍(du)鋅板本(ben)身的性能(neng)上面(mian)(mian)(mian)有(you)(you)(you)很(hen)(hen)大(da)的下降(jiang)，而且因(yin)為它(ta)在(zai)(zai)(zai)自(zi)己(ji)(ji)(ji)的平上面(mian)(mian)(mian)沒(mei)有(you)(you)(you)自(zi)己(ji)(ji)(ji)的表(biao)現(xian)(xian)，同時用(yong)(yong)戶(hu)在(zai)(zai)(zai)自(zi)己(ji)(ji)(ji)使(shi)用(yong)(yong)時，也不會達(da)(da)到(dao)很(hen)(hen)高的使(shi)用(yong)(yong)壽命(ming)。

鍍(du)(du)(du)鋅(xin)(xin)(xin)(xin)(xin)方(fang)管是(shi)一種具以熱(re)軋(ya)(ya)或冷(leng)軋(ya)(ya)鍍(du)(du)(du)鋅(xin)(xin)(xin)(xin)(xin)帶鋼(gang)(gang)或鍍(du)(du)(du)鋅(xin)(xin)(xin)(xin)(xin)卷板為(wei)坯料(liao)經(jing)冷(leng)彎(wan)(wan)曲加工成(cheng)型(xing)(xing)后(hou)(hou)再(zai)經(jing)高頻焊接制(zhi)成(cheng)的(de)(de)(de)(de)方(fang)形(xing)(xing)截(jie)面形(xing)(xing)狀尺(chi)寸的(de)(de)(de)(de)空心方(fang)形(xing)(xing)的(de)(de)(de)(de)截(jie)面型(xing)(xing)鋼(gang)(gang)鋼(gang)(gang)管;或將(jiang)事(shi)先做好的(de)(de)(de)(de)冷(leng)彎(wan)(wan)空心型(xing)(xing)鋼(gang)(gang)管再(zai)經(jing)熱(re)浸鍍(du)(du)(du)鋅(xin)(xin)(xin)(xin)(xin)加工而成(cheng)的(de)(de)(de)(de)鍍(du)(du)(du)鋅(xin)(xin)(xin)(xin)(xin)方(fang)矩管。鍍(du)(du)(du)鋅(xin)(xin)(xin)(xin)(xin)卷廠(chang)產量隨(sui)著國(guo)民(min)生活(huo)水平不(bu)斷(duan)提(ti)高和城市化建設的(de)(de)(de)(de)不(bu)斷(duan)推(tui)進(jin)，從(cong)現在的(de)(de)(de)(de)1.6億噸(dun)每年(nian)，增加到3億噸(dun)甚至更多也(ye)不(bu)是(shi)什么(me)很遙遠的(de)(de)(de)(de)夢想(xiang)。作為(wei)煉(lian)鋼(gang)(gang)原料(liao)的(de)(de)(de)(de)鐵(tie)礦石與廢(fei)鋼(gang)(gang)，前(qian)者(zhe)(zhe)是(shi)不(bu)可(ke)的(de)(de)(de)(de)資源(yuan)，后(hou)(hou)者(zhe)(zhe)是(shi)可(ke)以循(xun)環利用(yong)的(de)(de)(de)(de)資源(yuan)。無(wu)論從(cong)環保角度(du)還是(shi)從(cong)鋼(gang)(gang)企的(de)(de)(de)(de)運(yun)作成(cheng)本(ben)上看，廢(fei)鋼(gang)(gang)都有著礦石所無(wu)法(fa)比擬的(de)(de)(de)(de)優勢(shi)。發展高強(qiang)度(du)熱(re)鍍(du)(du)(du)鋅(xin)(xin)(xin)(xin)(xin)鋼(gang)(gang)板。隨(sui)著汽車(che)工業逐(zhu)漸(jian)向、節能方(fang)向發展，對(dui)汽車(che)用(yong)鍍(du)(du)(du)鋅(xin)(xin)(xin)(xin)(xin)鋼(gang)(gang)板性能要求也(ye)進(jin)一步提(ti)高。為(wei)了(le)汽車(che)板的(de)(de)(de)(de)耐腐蝕性，將(jiang)擴大熱(re)鍍(du)(du)(du)鋅(xin)(xin)(xin)(xin)(xin)鋼(gang)(gang)板的(de)(de)(de)(de)使用(yong)率。

鍍鋅(xin)(xin)(xin)(xin)(xin)卷(juan)分熱鍍鋅(xin)(xin)(xin)(xin)(xin)和電(dian)(dian)鍍鋅(xin)(xin)(xin)(xin)(xin)兩種(zhong)(zhong)，熱鍍鋅(xin)(xin)(xin)(xin)(xin)鍍鋅(xin)(xin)(xin)(xin)(xin)層厚，具有(you)鍍層均勻，附著力強(qiang)，使(shi)用壽命長(chang)等優點。電(dian)(dian)鍍鋅(xin)(xin)(xin)(xin)(xin)成本低，表面(mian)不是很光滑，其本身(shen)的(de)耐(nai)腐蝕性(xing)(xing)(xing)比熱鍍鋅(xin)(xin)(xin)(xin)(xin)管(guan)(guan)相差很多(duo)。提(ti)起鍍鋅(xin)(xin)(xin)(xin)(xin)管(guan)(guan)，可能(neng)沒接觸過(guo)建材的(de)朋(peng)友并不了解。從1935年建立一條連續(xu)涂層鋼(gang)板(ban)(ban)線(xian)開始，彩涂板(ban)(ban)得到了廣(guang)泛應用，目(mu)前彩涂板(ban)(ban)的(de)品種(zhong)(zhong)繁多(duo)，大(da)約超過(guo)600種(zhong)(zhong)，彩涂板(ban)(ban)兼(jian)有(you)機(ji)聚合物與鋼(gang)板(ban)(ban)兩者(zhe)的(de)優點，既有(you)有(you)機(ji)聚合物的(de)良好著色性(xing)(xing)(xing)、成型性(xing)(xing)(xing)、耐(nai)蝕性(xing)(xing)(xing)、裝飾性(xing)(xing)(xing)、又有(you)鋼(gang)板(ban)(ban)的(de)高強(qiang)度和易(yi)加(jia)工性(xing)(xing)(xing)，能(neng)很容易(yi)地(di)進行沖壓裁剪(jian)、彎曲、深(shen)沖等加(jia)工。