貴陽白鐵重慶樓承板的鍍鋅量沒有一個具體的標準，制作壓型鋼板的冷軋鋼卷須連續熱浸鍍鋅（或鍍鋁鋅），鍍（鋁）鋅量視設計要求而定。白鐵批發樓(lou)承板(ban)(ban)用壓型鋼(gang)板(ban)(ban)宜(yi)選擇熱(re)浸(jin)鍍(du)(du)(du)鋅(xin)鋼(gang)板(ban)(ban)。不允許使用電鍍(du)(du)(du)鋅(xin)鋼(gang)板(ban)(ban)，電鍍(du)(du)(du)鋅(xin)鋼(gang)板(ban)(ban)僅在基(ji)材表面形成保護層(ceng)，防(fang)(fang)腐能(neng)(neng)力有限。目前市場上有鍍(du)(du)(du)鋅(xin)鋼(gang)板(ban)(ban)（鍍(du)(du)(du)層(ceng)含鋁(lv)5%或55%），在酸性環(huan)境下(xia)的(de)防(fang)(fang)腐效果(guo)由于熱(re)浸(jin)鍍(du)(du)(du)鋅(xin)鋼(gang)板(ban)(ban)，但在混凝(ning)(ning)(ning)土(tu)的(de)堿性條(tiao)件下(xia)，鍍(du)(du)(du)鋁(lv)鋅(xin)的(de)防(fang)(fang)腐蝕(shi)性能(neng)(neng)低(di)于熱(re)浸(jin)鍍(du)(du)(du)鋅(xin)鋼(gang)板(ban)(ban)，且鋁(lv)會(hui)和(he)混凝(ning)(ning)(ning)土(tu)發生反應(ying)，并(bing)降(jiang)低(di)混凝(ning)(ning)(ning)土(tu)與鋼(gang)板(ban)(ban)的(de)粘(zhan)結性能(neng)(neng)。因此(ci)參考國外規范，及國內(nei)外工程，行家壓型鋼(gang)板(ban)(ban)不建議使用鍍(du)(du)(du)鋁(lv)鋅(xin)鋼(gang)板(ban)(ban)。

熱鍍(du)鋅(xin)卷板價格(ge)行業統(tong)計數據(ju)(ju)(ju)顯(xian)(xian)示(shi)，十一(yi)月國內粗鋼日均產(chan)(chan)量為兩(liang)百零九萬噸，環(huan)比下降3.3%，創(chuang)出(chu)今年以(yi)來水平，但是當前(qian)減產(chan)(chan)受到季節性(xing)因素支撐，市(shi)場(chang)對(dui)數據(ju)(ju)(ju)有(you)效(xiao)(xiao)性(xing)提(ti)出(chu)質疑。鍍(du)鋅(xin)卷工業品(pin)而言，近期陸續公布的重(zhong)要數據(ju)(ju)(ju)中性(xing)偏多。但值得(de)注意(yi)的是，同年十一(yi)月熱鍍(du)鋅(xin)卷板價格(ge)工業增(zeng)加(jia)值和投資(zi)增(zeng)速(su)放緩，進(jin)一(yi)步印證了國內總需(xu)求乏力，工業復蘇形勢不容(rong)樂(le)觀。加(jia)上(shang)未來經(jing)濟結(jie)構調整等因素，工業品(pin)價格(ge)反彈(dan)高度將(jiang)有(you)限(xian)。傳統(tong)需(xu)求淡季效(xiao)(xiao)應還在持續不斷地發酵，冬儲效(xiao)(xiao)果不佳。雖然數據(ju)(ju)(ju)顯(xian)(xian)示(shi)供應壓力開(kai)始減輕(qing)，但是目(mu)前(qian)處于(yu)鋼鐵需(xu)求淡季，市(shi)場(chang)成(cheng)交萎(wei)縮，下游采購遲(chi)遲(chi)未能(neng)有(you)效(xiao)(xiao)跟(gen)進(jin)，市(shi)場(chang)信心不足，鍍(du)鋅(xin)鋼板貿易商囤貨現象也不明顯(xian)(xian)。

首先，在鋼結構(gou)樓層板(ban)(ban)(ban)(ban)(ban)(ban)(ban)中要(yao)(yao)(yao)達到耐火(huo)1.5小時，總(zong)的(de)來說可以選(xuan)擇開(kai)(kai)口(kou)(kou)(kou)(kou)板(ban)(ban)(ban)(ban)(ban)(ban)(ban)、縮口(kou)(kou)(kou)(kou)板(ban)(ban)(ban)(ban)(ban)(ban)(ban)、閉口(kou)(kou)(kou)(kou)板(ban)(ban)(ban)(ban)(ban)(ban)(ban)三大(da)類。規(gui)范上混凝土要(yao)(yao)(yao)高于開(kai)(kai)口(kou)(kou)(kou)(kou)板(ban)(ban)(ban)(ban)(ban)(ban)(ban)肋頂之上80mm，并(bing)且板(ban)(ban)(ban)(ban)(ban)(ban)(ban)底需(xu)(xu)配置板(ban)(ban)(ban)(ban)(ban)(ban)(ban)底受力(li)筋。還有(you)一種(zhong)就是再開(kai)(kai)口(kou)(kou)(kou)(kou)板(ban)(ban)(ban)(ban)(ban)(ban)(ban)底部刷(shua)防火(huo)涂料，涂料厚(hou)度大(da)于等于15,這(zhe)樣的(de)話，只要(yao)(yao)(yao)達到構(gou)造要(yao)(yao)(yao)求高于肋頂5公分就可以了(le)。而縮口(kou)(kou)(kou)(kou)板(ban)(ban)(ban)(ban)(ban)(ban)(ban)和閉口(kou)(kou)(kou)(kou)板(ban)(ban)(ban)(ban)(ban)(ban)(ban)，只需(xu)(xu)要(yao)(yao)(yao)總(zong)的(de)樓板(ban)(ban)(ban)(ban)(ban)(ban)(ban)厚(hou)度大(da)于等于110即可，但是縮口(kou)(kou)(kou)(kou)板(ban)(ban)(ban)(ban)(ban)(ban)(ban)雖然在防火(huo)方(fang)面比開(kai)(kai)口(kou)(kou)(kou)(kou)板(ban)(ban)(ban)(ban)(ban)(ban)(ban)要(yao)(yao)(yao)好。但是底部還是需(xu)(xu)要(yao)(yao)(yao)加板(ban)(ban)(ban)(ban)(ban)(ban)(ban)底受力(li)筋，而閉口(kou)(kou)(kou)(kou)板(ban)(ban)(ban)(ban)(ban)(ban)(ban)則不需(xu)(xu)要(yao)(yao)(yao)。

鍍(du)鋅卷分熱鍍(du)鋅和電鍍(du)鋅兩種，熱鍍(du)鋅鍍(du)鋅層(ceng)(ceng)(ceng)厚，具有(you)(you)鍍(du)層(ceng)(ceng)(ceng)均勻(yun)，附著力強(qiang)，使用壽命長(chang)等優(you)點(dian)。電鍍(du)鋅成(cheng)本低，表面不是很光(guang)滑，其本身的耐腐蝕(shi)性(xing)比熱鍍(du)鋅管相差很多。提起鍍(du)鋅管，可能沒接(jie)觸過建材的朋友并不了解。從1935年建立一條連(lian)續涂(tu)層(ceng)(ceng)(ceng)鋼(gang)板線開始，彩(cai)涂(tu)板得到了廣泛應用，目(mu)前彩(cai)涂(tu)板的品種繁多，大約超過600種，彩(cai)涂(tu)板兼有(you)(you)機(ji)聚合物與(yu)鋼(gang)板兩者的優(you)點(dian)，既(ji)有(you)(you)有(you)(you)機(ji)聚合物的良好(hao)著色性(xing)、成(cheng)型性(xing)、耐蝕(shi)性(xing)、裝(zhuang)飾性(xing)、又(you)有(you)(you)鋼(gang)板的高(gao)強(qiang)度(du)和易加工性(xing)，能很容易地進行沖(chong)壓裁剪、彎(wan)曲、深(shen)沖(chong)等加工。