首先，在(zai)鋼結(jie)構樓(lou)層板(ban)(ban)中要達到耐火(huo)1.5小時，總的來說可(ke)以選擇(ze)開口(kou)(kou)板(ban)(ban)、縮(suo)口(kou)(kou)板(ban)(ban)、閉口(kou)(kou)板(ban)(ban)三(san)大類(lei)。規范上混凝(ning)土(tu)要高(gao)(gao)于開口(kou)(kou)板(ban)(ban)肋(lei)頂(ding)之上80mm，并且板(ban)(ban)底(di)需配置板(ban)(ban)底(di)受力筋。還有(you)一(yi)種就(jiu)是再開口(kou)(kou)板(ban)(ban)底(di)部(bu)刷防火(huo)涂料，涂料厚(hou)度(du)大于等于15,這樣(yang)的話(hua)，只(zhi)要達到構造要求高(gao)(gao)于肋(lei)頂(ding)5公分(fen)就(jiu)可(ke)以了。而(er)縮(suo)口(kou)(kou)板(ban)(ban)和閉口(kou)(kou)板(ban)(ban)，只(zhi)需要總的樓(lou)板(ban)(ban)厚(hou)度(du)大于等于110即可(ke)，但是縮(suo)口(kou)(kou)板(ban)(ban)雖然(ran)在(zai)防火(huo)方面比開口(kou)(kou)板(ban)(ban)要好。但是底(di)部(bu)還是需要加板(ban)(ban)底(di)受力筋，而(er)閉口(kou)(kou)板(ban)(ban)則不需要。

冷軋板批發鍍鋅方管是一種具以熱軋或冷軋鍍鋅帶鋼或鍍鋅卷板為坯料經冷彎曲加工成型后再經高頻焊接制成的方形截面形狀尺寸的空心方形的截面型鋼鋼管；鍍鋅卷或將事先做好的冷彎空心型鋼管再經熱浸鍍鋅加工而成的鍍鋅方矩管。北京冷軋板鍍(du)鋅(xin)(xin)量(liang)是表示鍍(du)鋅(xin)(xin)板(ban)鋅(xin)(xin)層(ceng)厚度的一(yi)個普(pu)遍采用的有效(xiao)方法。鍍(du)鋅(xin)(xin)量(liang)的單位(wei)為g/m2。鍍(du)鋅(xin)(xin)層(ceng)通過(guo)鈍(dun)化處(chu)理(li)，可減少(shao)潮溫(wen)貯運條件下產(chan)生折銹蝕(白銹) 。但這種化學處(chu)理(li)的防(fang)腐蝕性能(neng)是有限的，而(er)且，妨礙大多數涂(tu)料的附(fu)著性。這種處(chu)理(li)一(yi)般不用在鋅(xin)(xin)鐵合(he)金鍍(du)層(ceng)，除(chu)光(guang)整表面外，作為常規，生產(chan)廠(chang)對其他類型的鍍(du)鋅(xin)(xin)層(ceng)均進行鈍(dun)化處(chu)理(li)。

鍍(du)(du)鋅(xin)(xin)(xin)(xin)(xin)(xin)(xin)帶(dai)鋼(gang)(gang)的(de)(de)鋅(xin)(xin)(xin)(xin)(xin)(xin)(xin)層特性 電鍍(du)(du)鋅(xin)(xin)(xin)(xin)(xin)(xin)(xin)層是(shi)不能形成(cheng)鋅(xin)(xin)(xin)(xin)(xin)(xin)(xin)花的(de)(de)，熱(re)鍍(du)(du)鋅(xin)(xin)(xin)(xin)(xin)(xin)(xin)層則有(you)鋅(xin)(xin)(xin)(xin)(xin)(xin)(xin)花，其形成(cheng)過(guo)程(cheng)如下：當鍍(du)(du)鋅(xin)(xin)(xin)(xin)(xin)(xin)(xin)帶(dai)從(cong)鋅(xin)(xin)(xin)(xin)(xin)(xin)(xin)鍋出來(lai)后，經氣(qi)刀的(de)(de)噴(pen)吹(chui)，大(da)量(liang)鋅(xin)(xin)(xin)(xin)(xin)(xin)(xin)液被吹(chui)回鋅(xin)(xin)(xin)(xin)(xin)(xin)(xin)鍋，這時帶(dai)鋼(gang)(gang)表面還(huan)有(you)純(chun)鋅(xin)(xin)(xin)(xin)(xin)(xin)(xin)層，呈液 態附在鋼(gang)(gang)板表面，在鋼(gang)(gang)板表面形成(cheng)大(da)量(liang)結(jie)晶核，隨著(zhu)鋼(gang)(gang)板上升冷(leng)卻(que)，使結(jie)晶核慢(man)(man)慢(man)(man)長成(cheng)鋅(xin)(xin)(xin)(xin)(xin)(xin)(xin)花。冷(leng)卻(que)速度越快鋅(xin)(xin)(xin)(xin)(xin)(xin)(xin)花越小，冷(leng)卻(que)速度越慢(man)(man)鋅(xin)(xin)(xin)(xin)(xin)(xin)(xin)花越大(da)。熱(re)鍍(du)(du)鋅(xin)(xin)(xin)(xin)(xin)(xin)(xin)帶(dai)鋼(gang)(gang)在我國市場一直是(shi)緊缺品種。從(cong)20世紀90年(nian)代中(zhong)期以來(lai)，每年(nian)都要從(cong)國外進口80-100萬t左右。隨著(zhu)國內經濟的(de)(de)發展，尤其是(shi)汽車、家(jia)電及建筑業的(de)(de)發展，對(dui)鍍(du)(du)鋅(xin)(xin)(xin)(xin)(xin)(xin)(xin)帶(dai)鋼(gang)(gang)的(de)(de)需求量(liang)也大(da)大(da)增(zeng)加。

樓(lou)(lou)承板(ban)(ban)(ban)(ban)(ban)(ban)鋼(gang)(gang)筋(jin)桁(heng)架是(shi)將樓(lou)(lou)板(ban)(ban)(ban)(ban)(ban)(ban)中的(de)(de)(de)鋼(gang)(gang)筋(jin)在工(gong)(gong)(gong)廠采用(yong)(yong)進口設備加工(gong)(gong)(gong)成(cheng)鋼(gang)(gang)筋(jin)桁(heng)架，并(bing)將鋼(gang)(gang)筋(jin)桁(heng)架與鍍鋅(xin)鋼(gang)(gang)板(ban)(ban)(ban)(ban)(ban)(ban)在工(gong)(gong)(gong)廠焊接(jie)成(cheng)一體的(de)(de)(de)組合模板(ban)(ban)(ban)(ban)(ban)(ban)，使其在施工(gong)(gong)(gong)階段可作為鋼(gang)(gang)梁的(de)(de)(de)側向(xiang)(xiang)(xiang)支撐使用(yong)(yong)！樓(lou)(lou)板(ban)(ban)(ban)(ban)(ban)(ban)連(lian)接(jie)采用(yong)(yong)扣合方式，板(ban)(ban)(ban)(ban)(ban)(ban)與板(ban)(ban)(ban)(ban)(ban)(ban)之(zhi)間(jian)的(de)(de)(de)拉鉤連(lian)接(jie)應緊密，保證(zheng)澆筑(zhu)(zhu)混凝土時(shi)(shi)不漏漿，同時(shi)(shi)注意排板(ban)(ban)(ban)(ban)(ban)(ban)方向(xiang)(xiang)(xiang)要(yao)一致，桁(heng)架節點間(jian)距(ju)為200㎜，注意不同模板(ban)(ban)(ban)(ban)(ban)(ban)的(de)(de)(de)橫向(xiang)(xiang)(xiang)節點要(yao)對齊。我們(men)仔細觀察的(de)(de)(de)話會(hui)發現很多(duo)高(gao)層建筑(zhu)(zhu)上都(dou)會(hui)設置鋼(gang)(gang)筋(jin)桁(heng)架樓(lou)(lou)承板(ban)(ban)(ban)(ban)(ban)(ban)，我們(men)雖(sui)然經常用(yong)(yong)到該樓(lou)(lou)承板(ban)(ban)(ban)(ban)(ban)(ban)，但很少有人知(zhi)道這種板(ban)(ban)(ban)(ban)(ban)(ban)材(cai)為什么會(hui)用(yong)(yong)于高(gao)層建筑(zhu)(zhu)中。下(xia)面小編將為您介紹一下(xia)該板(ban)(ban)(ban)(ban)(ban)(ban)材(cai)在高(gao)層建筑(zhu)(zhu)中的(de)(de)(de)使用(yong)(yong)優(you)勢！鋼(gang)(gang)筋(jin)樓(lou)(lou)承板(ban)(ban)(ban)(ban)(ban)(ban)的(de)(de)(de)搭接(jie)是(shi)有著(zhu)嚴格的(de)(de)(de)施工(gong)(gong)(gong)要(yao)求的(de)(de)(de)，為保障(zhang)樓(lou)(lou)承板(ban)(ban)(ban)(ban)(ban)(ban)安裝(zhuang)牢固，該板(ban)(ban)(ban)(ban)(ban)(ban)材(cai)的(de)(de)(de)搭接(jie)需(xu)(xu)要(yao)按(an)照(zhao)說明書正(zheng)確進行，搭接(jie)過程中還需(xu)(xu)要(yao)注意，沿順(shun)肋方向(xiang)(xiang)(xiang)，壓型鋼(gang)(gang)板(ban)(ban)(ban)(ban)(ban)(ban)如果可以(yi)滿足正(zheng)截面承載(zai)力及剪(jian)切粘結承載(zai)力的(de)(de)(de)要(yao)求，可以(yi)不用(yong)(yong)配順(shun)肋方向(xiang)(xiang)(xiang)的(de)(de)(de)鋼(gang)(gang)筋(jin)，這時(shi)(shi)候(hou)要(yao)注意計算剪(jian)切粘結承載(zai)力。