樓(lou)(lou)承(cheng)(cheng)板(ban)(ban)鍍(du)(du)鋅(xin)首要(yao)(yao)起到防腐的(de)效果，按標(biao)準組(zu)(zu)合(he)樓(lou)(lou)板(ban)(ban)與非組(zu)(zu)合(he)樓(lou)(lou)板(ban)(ban)壓型鋼板(ban)(ban)應選用(yong)熱鍍(du)(du)鋅(xin)，不(bu)該選用(yong)電鍍(du)(du)鋅(xin)鋼板(ban)(ban)，其雙面鍍(du)(du)鋅(xin)層(ceng)(ceng)(ceng)總含(han)量要(yao)(yao)滿(man)足在使(shi)用(yong)期(qi)間(jian)不(bu)致銹損的(de)要(yao)(yao)求。當作為(wei)(wei)非組(zu)(zu)合(he)樓(lou)(lou)承(cheng)(cheng)板(ban)(ban)時(shi)，鍍(du)(du)鋅(xin)層(ceng)(ceng)(ceng)含(han)量可(ke)選用(yong)較(jiao)低值(zhi);當為(wei)(wei)組(zu)(zu)合(he)樓(lou)(lou)承(cheng)(cheng)板(ban)(ban)時(shi)，鍍(du)(du)鋅(xin)層(ceng)(ceng)(ceng)含(han)量不(bu)該小(xiao)于150g/m2。當為(wei)(wei)組(zu)(zu)合(he)樓(lou)(lou)板(ban)(ban)且使(shi)用(yong)環(huan)境條(tiao)件(jian)較(jiao)為(wei)(wei)惡劣時(shi)，鍍(du)(du)鋅(xin)層(ceng)(ceng)(ceng)含(han)量應選用(yong)上(shang)限值(zhi)或更(geng)高(gao)值(zhi)。更(geng)高(gao)的(de)鍍(du)(du)鋅(xin)要(yao)(yao)求，如雙面鍍(du)(du)鋅(xin)量為(wei)(wei)300g/m2、350g/m2或鍍(du)(du)鋁鋅(xin)(5%鋁)275g/m2、300g/m2等，較(jiao)高(gao)的(de)鍍(du)(du)層(ceng)(ceng)(ceng)量使(shi)組(zu)(zu)合(he)樓(lou)(lou)板(ban)(ban)有(you)更(geng)長耐久性，同等量的(de)鍍(du)(du)鋁鋅(xin)的(de)防銹蝕才能大約(yue)兩(liang)倍于一般(ban)熱鍍(du)(du)鋅(xin)。鍍(du)(du)鋅(xin)量也(ye)不(bu)是越厚越好，當鍍(du)(du)鋅(xin)量較(jiao)厚時(shi)，抗(kang)剪連接(jie)件(jian)栓釘的(de)焊(han)接(jie)質(zhi)量就(jiu)很難保證，焊(han)接(jie)時(shi)，宜選用(yong)局(ju)部除鋅(xin)處(chu)理措(cuo)施。

鍍鋅鋼板批發鍍鋅帶鋼的鋅層特性 電鍍鋅層是不能形成鋅花的，熱鍍鋅層則有鋅花，其形成過程如下：當鍍鋅帶從鋅鍋出來后，經氣刀的噴吹，大量鋅液被吹回鋅鍋，這時帶鋼表面還有純鋅層，呈液 態附在鋼板表面，在鋼板表面形成大量結晶核，隨著鋼板上升冷卻，使結晶核慢慢長成鋅花。德陽攀華鍍鋅鋼板冷卻(que)速(su)度(du)越快(kuai)鋅(xin)花(hua)越小，冷卻(que)速(su)度(du)越慢(man)鋅(xin)花(hua)越大。熱(re)鍍鋅(xin)帶(dai)鋼(gang)在(zai)我國(guo)市(shi)場一直是(shi)緊缺品種。從20世(shi)紀(ji)90年代中期以來，每年都要從國(guo)外(wai)進口80-100萬t左(zuo)右(you)。隨著國(guo)內經濟(ji)的發(fa)展，尤其是(shi)汽(qi)車、家電及建(jian)筑(zhu)業的發(fa)展，對鍍鋅(xin)帶(dai)鋼(gang)的需求量也(ye)大大增(zeng)加(jia)。

樓承(cheng)(cheng)(cheng)板(ban)(ban)(ban)(ban)鋼(gang)結構(gou)柱網間(jian)(jian)距(ju)一般5~9.0m×8~15m，次(ci)(ci)(ci)梁(liang)(liang)間(jian)(jian)距(ju)3m，而(er)樓承(cheng)(cheng)(cheng)板(ban)(ban)(ban)(ban)下料長(chang)度為(wei)4.97~8.97m，運(yun)輸與安裝均較(jiao)困(kun)難，尤其是(shi)(shi)帶由(you)(you)圓(yuan)弧(hu)區(qu)垂直吊(diao)(diao)裝樓承(cheng)(cheng)(cheng)板(ban)(ban)(ban)(ban)，由(you)(you)上(shang)(shang)而(er)下在(zai)次(ci)(ci)(ci)梁(liang)(liang)狹間(jian)(jian)穿套比較(jiao)困(kun)難，且打亂了次(ci)(ci)(ci)梁(liang)(liang)焊(han)接(jie)(jie)正常工序。控(kong)制下料長(chang)度為(wei)3～6m，則可避免垂直運(yun)輸時在(zai)次(ci)(ci)(ci)梁(liang)(liang)間(jian)(jian)無法吊(diao)(diao)運(yun)的問(wen)題。 樓承(cheng)(cheng)(cheng)板(ban)(ban)(ban)(ban)吊(diao)(diao)運(yun)時采用(yong)專用(yong)軟吊(diao)(diao)索(suo)。每次(ci)(ci)(ci)吊(diao)(diao)裝時應(ying)檢(jian)查軟吊(diao)(diao)索(suo)是(shi)(shi)否有撕裂、割斷(duan)現象。樓承(cheng)(cheng)(cheng)板(ban)(ban)(ban)(ban)擱置在(zai)鋼(gang)梁(liang)(liang)上(shang)(shang)時應(ying)防止探頭。鋪料時操作人員應(ying)系帶，并保證(zheng)邊鋪設邊固(gu)定在(zai)周邊繩(sheng)上(shang)(shang)。 焊(han)接(jie)(jie)采用(yong)熔透點焊(han)連接(jie)(jie)，施(shi)焊(han)前應(ying)準備(bei)邊角料引弧(hu)試(shi)焊(han)，調整施(shi)焊(han)電(dian)流(liu).因樓承(cheng)(cheng)(cheng)板(ban)(ban)(ban)(ban)底部無水平(ping)模板(ban)(ban)(ban)(ban)及(ji)垂直支撐(cheng)，澆筑混凝土時布料不宜(yi)太集中，采用(yong)平(ping)板(ban)(ban)(ban)(ban)振搗器及(ji)時分攤振搗。

近期(qi)(qi)鋼(gang)(gang)(gang)價(jia)延續(xu)低迷，隨著通(tong)國規模的(de)酷(ku)暑和旱季到(dao)來，熱鍍鋅(xin)卷板價(jia)格(ge)商場(chang)逐漸(jian)進(jin)入需要旺季，海內鋼(gang)(gang)(gang)鐵(tie)商場(chang)或將窄幅調整(zheng)。在決策層(ceng)兩手抓制(zhi)度措施落實狀況、貨銀本(ben)位度定向寬松力度加大的(de)直(zhi)觀層(ceng)面(mian)利好牽動下，商場(chang)信念逐漸(jian)趨(qu)穩，短期(qi)(qi)海內鋼(gang)(gang)(gang)價(jia)無(wu)望止跌企穩;另(ling)一(yi)上(shang)面(mian)，以后鋼(gang)(gang)(gang)價(jia)殺跌電能有(you)余，而上(shang)漲(zhang)也仍然屏(ping)障重重。熱鍍鋅(xin)卷板價(jia)格(ge)價(jia)錢或將長期(qi)(qi)在于低位運(yun)行場(chang)面(mian)。