Ⅰ.A brief account of steel structure work
There will be 6 8t bridge traveling cranes in production hall, welding H-section steel column and beam, structural main material is Q345B, cold bending sheet steel Z-purlin, wall and roof cladding are double-skin pressed steel sheet and thermal insulation wool.
Ⅱ.Characteristic of steel structure work
The single span of the work is 18m, the height of steel column is large, single frame plane external rigidity is very small, so the key point of safety technical control is to guarantee the stability outside the structural plane.
Take out 6 steel columns from grid line 9~14 in the production building, instead of 52.5m space truss as trimmer beam to support the upper structure and crane load, the installation of the space truss is a difficulty point of this work.
Ⅲ.Fabrication of steel structural members
Technical preparations prior fabrication
1. Study and check the design working drawing before fabrication, make shop drawing and get approval from designer then prepare material for fabrication.
一、鋼結(jié)構(gòu)工程概述
生產(chǎn)車(chē)間內(nèi)設(shè)有6個(gè)8T橋式桁車(chē)，鋼柱、鋼梁采用焊接成型的H型鋼，結(jié)構(gòu)主材采用Q345B，檁條采用Z型鋼，墻面采用雙層壓型鋼板+保溫棉的構(gòu)造，屋面采用鋼承板+保溫板+柔性防水卷材的構(gòu)造。
二、鋼結(jié)構(gòu)工程的特點(diǎn)
1、該工程單坡最大跨度為18m，鋼柱高度大，單榀框架的平面外剛度極小，吊裝過(guò)程中做好保證結(jié)構(gòu)平面外的穩(wěn)定作為安全技術(shù)控制的重點(diǎn)。
2、廠房最大連續(xù)24跨，長(zhǎng)度方向252m，制作安裝時(shí)應(yīng)注意誤差累計(jì)，做好測(cè)量控制點(diǎn)，保證整個(gè)廠房的安裝精度。
三、鋼構(gòu)件的制作
（一）、制作前的技術(shù)準(zhǔn)備
1、鋼結(jié)構(gòu)制作前必須熟悉設(shè)計(jì)的施工圖，了解設(shè)計(jì)要求，并審核圖紙，根據(jù)藍(lán)圖編制加工制作圖，并在得到原設(shè)計(jì)部門(mén)的認(rèn)可后方可進(jìn)行備料加工。
2、根據(jù)構(gòu)件類型、數(shù)量、用材制定加工計(jì)劃和加工程序。
3、編制施工工藝和技術(shù)措施，以及對(duì)加工用的設(shè)備制定檢查維護(hù)計(jì)劃，使機(jī)械設(shè)備處于良好狀態(tài)。
（二）、主材采購(gòu)計(jì)劃
1、對(duì)工程用的材料應(yīng)進(jìn)行選定和確認(rèn)。
2、各種材料均應(yīng)有質(zhì)量證明書(shū)和出廠合格證。若有疑議則應(yīng)按國(guó)家有關(guān)標(biāo)準(zhǔn)的