重慶樓承(cheng)(cheng)板(ban)(ban)分兩種。一種是把樓承(cheng)(cheng)板(ban)(ban)當(dang)做承(cheng)(cheng)受(shou)拉力的鋼(gang)筋(jin)(jin)(jin)計算(suan)的，另外(wai)一種是僅把樓承(cheng)(cheng)板(ban)(ban)作為模板(ban)(ban)計算(suan)而不(bu)參(can)與受(shou)力的。做模板(ban)(ban)計算(suan)的比較簡單，直接按照跨度頂就行了(le)。2米以下選(xuan)(xuan)(xuan)0.8的，2-3米的選(xuan)(xuan)(xuan)1.0的。樓承(cheng)(cheng)板(ban)(ban)作為受(shou)力鋼(gang)筋(jin)(jin)(jin)計算(suan)，就按照模板(ban)(ban)的選(xuan)(xuan)(xuan)用(yong)樓承(cheng)(cheng)板(ban)(ban)（或者(zhe)加厚且只能(neng)加厚），然(ran)后(hou)在計算(suan)配筋(jin)(jin)(jin)的時候(hou)可以按照面積減少鋼(gang)筋(jin)(jin)(jin)用(yong)量。樓承(cheng)(cheng)板(ban)(ban)不(bu)能(neng)單獨計算(suan)的，它和整個樓板(ban)(ban)是一個體系的。

重慶鍍鋅(xin)板按生產及加(jia)工方法可分為以(yi)下幾類： 熱浸(jin)鍍鋅(xin)鋼(gang)板。將薄鋼(gang)板浸(jin)入(ru)熔解的鋅(xin)槽中，使其表面(mian)粘附一層鋅(xin)的薄鋼(gang)板。目前主要采用連(lian)續(xu)鍍鋅(xin)工藝(yi)生產，即把成卷的鋼(gang)板連(lian)續(xu)浸(jin)在(zai)(zai)熔解有(you)鋅(xin)的鍍槽中制成鍍鋅(xin)鋼(gang)板； 合金化鍍鋅(xin)鋼(gang)板。為克(ke)服單面(mian)未涂(tu)(tu)鋅(xin)的缺點，又有(you)一種(zhong)在(zai)(zai)另(ling)面(mian)涂(tu)(tu)以(yi)薄層鋅(xin)的鍍鋅(xin)板，即雙面(mian)差鍍鋅(xin)板；合金、復(fu)合鍍鋅(xin)鋼(gang)板。它是(shi)用鋅(xin)和其他金屬(shu)如鉛(qian)、鋅(xin)制成合金乃至復(fu)合鍍成的鋼(gang)板。這種(zhong)鋼(gang)板既具有(you)防銹性(xing)能，又有(you)良好的涂(tu)(tu)裝性(xing)能。

鍍(du)鋅(xin)(xin)(xin)(xin)(xin)(xin)鋼(gang)(gang)(gang)板(ban)(ban)(ban)(ban)是(shi)為防止鋼(gang)(gang)(gang)板(ban)(ban)(ban)(ban)表面遭受腐蝕，延(yan)長其使(shi)(shi)(shi)用(yong)壽命，在鋼(gang)(gang)(gang)板(ban)(ban)(ban)(ban)表面涂(tu)以一(yi)層金(jin)(jin)(jin)屬鋅(xin)(xin)(xin)(xin)(xin)(xin)，這(zhe)(zhe)種(zhong)涂(tu)鋅(xin)(xin)(xin)(xin)(xin)(xin)的(de)(de)薄鋼(gang)(gang)(gang)板(ban)(ban)(ban)(ban)稱(cheng)為鍍(du)鋅(xin)(xin)(xin)(xin)(xin)(xin)板(ban)(ban)(ban)(ban)。鋼(gang)(gang)(gang)板(ban)(ban)(ban)(ban)也是(shi)用(yong)熱(re)浸(jin)(jin)法制造，但(dan)(dan)在出槽后(hou)，立即(ji)把它(ta)加(jia)熱(re)到500℃左右，使(shi)(shi)(shi)其生成(cheng)鋅(xin)(xin)(xin)(xin)(xin)(xin)和鐵(tie)的(de)(de)合(he)金(jin)(jin)(jin)被膜(mo)。這(zhe)(zhe)種(zhong)鍍(du)鋅(xin)(xin)(xin)(xin)(xin)(xin)卷(juan)具有(you)良(liang)好(hao)的(de)(de)涂(tu)料的(de)(de)密(mi)著性和焊接(jie)性。合(he)金(jin)(jin)(jin)化鍍(du)鋅(xin)(xin)(xin)(xin)(xin)(xin)鋼(gang)(gang)(gang)板(ban)(ban)(ban)(ban)。這(zhe)(zhe)種(zhong)鋼(gang)(gang)(gang)板(ban)(ban)(ban)(ban)也是(shi)用(yong)熱(re)浸(jin)(jin)法制造，但(dan)(dan)在出槽后(hou)，立即(ji)把它(ta)加(jia)熱(re)到500℃左右，使(shi)(shi)(shi)其生成(cheng)鋅(xin)(xin)(xin)(xin)(xin)(xin)和鐵(tie)的(de)(de)合(he)金(jin)(jin)(jin)被膜(mo)。這(zhe)(zhe)種(zhong)鍍(du)鋅(xin)(xin)(xin)(xin)(xin)(xin)板(ban)(ban)(ban)(ban)具有(you)良(liang)好(hao)的(de)(de)涂(tu)料的(de)(de)密(mi)著性和焊接(jie)性。熱(re)浸(jin)(jin)鍍(du)鋅(xin)(xin)(xin)(xin)(xin)(xin)鋼(gang)(gang)(gang)板(ban)(ban)(ban)(ban)。將薄鋼(gang)(gang)(gang)板(ban)(ban)(ban)(ban)浸(jin)(jin)入熔解(jie)的(de)(de)鋅(xin)(xin)(xin)(xin)(xin)(xin)槽中，使(shi)(shi)(shi)其表面粘附一(yi)層鋅(xin)(xin)(xin)(xin)(xin)(xin)的(de)(de)薄鋼(gang)(gang)(gang)板(ban)(ban)(ban)(ban)。目(mu)前主要采用(yong)連續(xu)鍍(du)鋅(xin)(xin)(xin)(xin)(xin)(xin)工(gong)藝(yi)生產，即(ji)把成(cheng)卷(juan)的(de)(de)鋼(gang)(gang)(gang)板(ban)(ban)(ban)(ban)連續(xu)浸(jin)(jin)在熔解(jie)有(you)鋅(xin)(xin)(xin)(xin)(xin)(xin)的(de)(de)鍍(du)槽中制成(cheng)鍍(du)鋅(xin)(xin)(xin)(xin)(xin)(xin)鋼(gang)(gang)(gang)板(ban)(ban)(ban)(ban)。合(he)金(jin)(jin)(jin)、復合(he)鍍(du)鋅(xin)(xin)(xin)(xin)(xin)(xin)鋼(gang)(gang)(gang)板(ban)(ban)(ban)(ban)。它(ta)是(shi)用(yong)鋅(xin)(xin)(xin)(xin)(xin)(xin)和其他金(jin)(jin)(jin)屬如(ru)鉛、鋅(xin)(xin)(xin)(xin)(xin)(xin)制成(cheng)合(he)金(jin)(jin)(jin)乃至(zhi)復合(he)鍍(du)成(cheng)的(de)(de)鋼(gang)(gang)(gang)板(ban)(ban)(ban)(ban)。這(zhe)(zhe)種(zhong)鋼(gang)(gang)(gang)板(ban)(ban)(ban)(ban)既具有(you)防銹性能(neng)，又有(you)良(liang)好(hao)的(de)(de)涂(tu)裝(zhuang)性能(neng)。

鍍鋅鋼板批發鍍鋅鋼板按用途又可分為一般用、屋頂用、建筑外側板用、結構用、瓦壟板用、拉伸用和深沖用等鍍鋅鋼板。大理鍍鋅鋼板對(dui)于一(yi)般(ban)(ban)防(fang)(fang)保(bao)護用(yong)(yong)(yong)鍍層(ceng)(ceng)，可(ke)以采用(yong)(yong)(yong)堿性(xing)鋅(xin)(xin)(xin)酸鹽鍍鋅(xin)(xin)(xin)彩色(se)鈍(dun)化(hua)工藝。有(you)時為了(le)產(chan)品的配色(se)需(xu)要(yao)，也可(ke)以采用(yong)(yong)(yong)藍白(bai)色(se)鈍(dun)化(hua)工藝，比如軍綠色(se)鈍(dun)化(hua)、黑色(se)鈍(dun)化(hua)等(deng)。為提高鋼(gang)(gang)管的耐(nai)腐(fu)(fu)(fu)蝕(shi)性(xing)能，對(dui)一(yi)般(ban)(ban)鋼(gang)(gang)管進(jin)行鍍鋅(xin)(xin)(xin)。鍍鋅(xin)(xin)(xin)卷(juan)分熱鍍鋅(xin)(xin)(xin)和電鍍鋅(xin)(xin)(xin)兩種，熱鍍鋅(xin)(xin)(xin)鍍鋅(xin)(xin)(xin)層(ceng)(ceng)厚，電鍍鋅(xin)(xin)(xin)成本低，表面不是很光滑。吹(chui)氧焊管：用(yong)(yong)(yong)作煉鋼(gang)(gang)吹(chui)氧用(yong)(yong)(yong)管，一(yi)般(ban)(ban)用(yong)(yong)(yong)小口徑的焊接鋼(gang)(gang)管，規格由(you)3/8-2寸八種。用(yong)(yong)(yong)08、10、15、20或者195-Q235的鋼(gang)(gang)帶制作成的，為了(le)防(fang)(fang)腐(fu)(fu)(fu)蝕(shi)，有(you)得進(jin)行滲鋁處理(li)。鍍鋅(xin)(xin)(xin)其防(fang)(fang)護作用(yong)(yong)(yong)更強，抗腐(fu)(fu)(fu)蝕(shi)能力強。整個結構由(you)鋅(xin)(xin)(xin)，形成致密的四元結晶(jing)體，此結晶(jing)體在鋼(gang)(gang)板上形成一(yi)層(ceng)(ceng)屏障， 因而(er)有(you)效的防(fang)(fang)止腐(fu)(fu)(fu)蝕(shi)因子穿透。 耐(nai)腐(fu)(fu)(fu)蝕(shi)性(xing)來自鋅(xin)(xin)(xin)的障礙層(ceng)(ceng)保(bao)護功能強。