重慶樓承板(ban)分兩種(zhong)。一(yi)(yi)種(zhong)是(shi)把樓承板(ban)當做承受拉力(li)的(de)鋼(gang)筋(jin)(jin)計算的(de)，另外一(yi)(yi)種(zhong)是(shi)僅把樓承板(ban)作為模板(ban)計算而不(bu)參與受力(li)的(de)。做模板(ban)計算的(de)比較簡(jian)單(dan)，直接(jie)按(an)照(zhao)跨度(du)頂(ding)就(jiu)行了。2米以(yi)(yi)下選0.8的(de)，2-3米的(de)選1.0的(de)。樓承板(ban)作為受力(li)鋼(gang)筋(jin)(jin)計算，就(jiu)按(an)照(zhao)模板(ban)的(de)選用樓承板(ban)（或者加厚且只能加厚），然后在計算配筋(jin)(jin)的(de)時(shi)候可(ke)以(yi)(yi)按(an)照(zhao)面積(ji)減少鋼(gang)筋(jin)(jin)用量。樓承板(ban)不(bu)能單(dan)獨計算的(de)，它和整個(ge)樓板(ban)是(shi)一(yi)(yi)個(ge)體(ti)系的(de)。

重慶鍍(du)鋅(xin)(xin)(xin)(xin)板(ban)按(an)生產(chan)及加工方法可分為以下幾類： 熱浸(jin)鍍(du)鋅(xin)(xin)(xin)(xin)鋼(gang)板(ban)。將薄鋼(gang)板(ban)浸(jin)入熔解的(de)鋅(xin)(xin)(xin)(xin)槽中，使其表面粘附一層鋅(xin)(xin)(xin)(xin)的(de)薄鋼(gang)板(ban)。目前主要采(cai)用連(lian)續(xu)鍍(du)鋅(xin)(xin)(xin)(xin)工藝生產(chan)，即把(ba)成(cheng)卷(juan)的(de)鋼(gang)板(ban)連(lian)續(xu)浸(jin)在熔解有(you)鋅(xin)(xin)(xin)(xin)的(de)鍍(du)槽中制成(cheng)鍍(du)鋅(xin)(xin)(xin)(xin)鋼(gang)板(ban)； 合金化鍍(du)鋅(xin)(xin)(xin)(xin)鋼(gang)板(ban)。為克(ke)服(fu)單(dan)面未涂(tu)鋅(xin)(xin)(xin)(xin)的(de)缺點，又有(you)一種在另面涂(tu)以薄層鋅(xin)(xin)(xin)(xin)的(de)鍍(du)鋅(xin)(xin)(xin)(xin)板(ban)，即雙面差鍍(du)鋅(xin)(xin)(xin)(xin)板(ban)；合金、復合鍍(du)鋅(xin)(xin)(xin)(xin)鋼(gang)板(ban)。它是用鋅(xin)(xin)(xin)(xin)和其他金屬如鉛、鋅(xin)(xin)(xin)(xin)制成(cheng)合金乃至復合鍍(du)成(cheng)的(de)鋼(gang)板(ban)。這種鋼(gang)板(ban)既(ji)具(ju)有(you)防銹性能，又有(you)良(liang)好的(de)涂(tu)裝性能。

鍍(du)(du)鋅(xin)(xin)(xin)鋼(gang)板(ban)(ban)(ban)(ban)(ban)(ban)是(shi)為防止鋼(gang)板(ban)(ban)(ban)(ban)(ban)(ban)表面遭受腐蝕，延長其(qi)(qi)使(shi)用(yong)(yong)壽命(ming)，在(zai)(zai)鋼(gang)板(ban)(ban)(ban)(ban)(ban)(ban)表面涂以一(yi)層金(jin)(jin)屬鋅(xin)(xin)(xin)，這(zhe)種涂鋅(xin)(xin)(xin)的(de)(de)薄(bo)鋼(gang)板(ban)(ban)(ban)(ban)(ban)(ban)稱(cheng)為鍍(du)(du)鋅(xin)(xin)(xin)板(ban)(ban)(ban)(ban)(ban)(ban)。鋼(gang)板(ban)(ban)(ban)(ban)(ban)(ban)也(ye)是(shi)用(yong)(yong)熱浸法制(zhi)(zhi)(zhi)(zhi)造，但在(zai)(zai)出槽(cao)后，立即把它加熱到(dao)(dao)500℃左右(you)，使(shi)其(qi)(qi)生(sheng)成鋅(xin)(xin)(xin)和(he)鐵的(de)(de)合(he)金(jin)(jin)被膜。這(zhe)種鍍(du)(du)鋅(xin)(xin)(xin)卷具(ju)有(you)(you)(you)良(liang)(liang)好(hao)的(de)(de)涂料的(de)(de)密著(zhu)性(xing)和(he)焊(han)接性(xing)。合(he)金(jin)(jin)化鍍(du)(du)鋅(xin)(xin)(xin)鋼(gang)板(ban)(ban)(ban)(ban)(ban)(ban)。這(zhe)種鋼(gang)板(ban)(ban)(ban)(ban)(ban)(ban)也(ye)是(shi)用(yong)(yong)熱浸法制(zhi)(zhi)(zhi)(zhi)造，但在(zai)(zai)出槽(cao)后，立即把它加熱到(dao)(dao)500℃左右(you)，使(shi)其(qi)(qi)生(sheng)成鋅(xin)(xin)(xin)和(he)鐵的(de)(de)合(he)金(jin)(jin)被膜。這(zhe)種鍍(du)(du)鋅(xin)(xin)(xin)板(ban)(ban)(ban)(ban)(ban)(ban)具(ju)有(you)(you)(you)良(liang)(liang)好(hao)的(de)(de)涂料的(de)(de)密著(zhu)性(xing)和(he)焊(han)接性(xing)。熱浸鍍(du)(du)鋅(xin)(xin)(xin)鋼(gang)板(ban)(ban)(ban)(ban)(ban)(ban)。將薄(bo)鋼(gang)板(ban)(ban)(ban)(ban)(ban)(ban)浸入熔解(jie)的(de)(de)鋅(xin)(xin)(xin)槽(cao)中，使(shi)其(qi)(qi)表面粘附一(yi)層鋅(xin)(xin)(xin)的(de)(de)薄(bo)鋼(gang)板(ban)(ban)(ban)(ban)(ban)(ban)。目前主要采用(yong)(yong)連續鍍(du)(du)鋅(xin)(xin)(xin)工(gong)藝生(sheng)產，即把成卷的(de)(de)鋼(gang)板(ban)(ban)(ban)(ban)(ban)(ban)連續浸在(zai)(zai)熔解(jie)有(you)(you)(you)鋅(xin)(xin)(xin)的(de)(de)鍍(du)(du)槽(cao)中制(zhi)(zhi)(zhi)(zhi)成鍍(du)(du)鋅(xin)(xin)(xin)鋼(gang)板(ban)(ban)(ban)(ban)(ban)(ban)。合(he)金(jin)(jin)、復合(he)鍍(du)(du)鋅(xin)(xin)(xin)鋼(gang)板(ban)(ban)(ban)(ban)(ban)(ban)。它是(shi)用(yong)(yong)鋅(xin)(xin)(xin)和(he)其(qi)(qi)他金(jin)(jin)屬如鉛(qian)、鋅(xin)(xin)(xin)制(zhi)(zhi)(zhi)(zhi)成合(he)金(jin)(jin)乃至復合(he)鍍(du)(du)成的(de)(de)鋼(gang)板(ban)(ban)(ban)(ban)(ban)(ban)。這(zhe)種鋼(gang)板(ban)(ban)(ban)(ban)(ban)(ban)既具(ju)有(you)(you)(you)防銹性(xing)能，又有(you)(you)(you)良(liang)(liang)好(hao)的(de)(de)涂裝(zhuang)性(xing)能。

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。大理鍍鋅鋼板對于一般(ban)(ban)(ban)防保(bao)護用(yong)鍍(du)(du)層，可以采用(yong)堿(jian)性鋅(xin)(xin)酸鹽鍍(du)(du)鋅(xin)(xin)彩色(se)(se)鈍(dun)化工藝(yi)。有時為(wei)(wei)了(le)產(chan)品的(de)(de)(de)配色(se)(se)需要，也可以采用(yong)藍白(bai)色(se)(se)鈍(dun)化工藝(yi)，比如(ru)軍綠色(se)(se)鈍(dun)化、黑色(se)(se)鈍(dun)化等。為(wei)(wei)提(ti)高鋼管(guan)的(de)(de)(de)耐腐蝕(shi)性能，對一般(ban)(ban)(ban)鋼管(guan)進行(xing)鍍(du)(du)鋅(xin)(xin)。鍍(du)(du)鋅(xin)(xin)卷(juan)分(fen)熱(re)鍍(du)(du)鋅(xin)(xin)和電鍍(du)(du)鋅(xin)(xin)兩種(zhong)，熱(re)鍍(du)(du)鋅(xin)(xin)鍍(du)(du)鋅(xin)(xin)層厚，電鍍(du)(du)鋅(xin)(xin)成(cheng)(cheng)本(ben)低，表面不是(shi)很(hen)光滑。吹(chui)氧焊管(guan)：用(yong)作煉鋼吹(chui)氧用(yong)管(guan)，一般(ban)(ban)(ban)用(yong)小(xiao)口(kou)徑(jing)的(de)(de)(de)焊接鋼管(guan)，規格由3/8-2寸八種(zhong)。用(yong)08、10、15、20或者195-Q235的(de)(de)(de)鋼帶制作成(cheng)(cheng)的(de)(de)(de)，為(wei)(wei)了(le)防腐蝕(shi)，有得進行(xing)滲鋁處理。鍍(du)(du)鋅(xin)(xin)其防護作用(yong)更(geng)強，抗(kang)腐蝕(shi)能力強。整個結(jie)構由鋅(xin)(xin)，形(xing)(xing)成(cheng)(cheng)致(zhi)密(mi)的(de)(de)(de)四元結(jie)晶(jing)(jing)體，此結(jie)晶(jing)(jing)體在鋼板上形(xing)(xing)成(cheng)(cheng)一層屏(ping)障(zhang)， 因而有效的(de)(de)(de)防止腐蝕(shi)因子(zi)穿透。 耐腐蝕(shi)性來(lai)自鋅(xin)(xin)的(de)(de)(de)障(zhang)礙層保(bao)護功(gong)能強。