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門式腳手架是一種工廠生產(chǎn)、現(xiàn)場搭設(shè)的移動腳手架，是當(dāng)今國際上應(yīng)用最普遍的腳手架之一。它不僅可作為外腳手架，也可作為內(nèi)腳手架或滿堂移動腳手架。門式鋼管腳手架因其幾何尺寸標(biāo)準(zhǔn)化、結(jié)構(gòu)合理、受力性能好、施工中裝拆容易、安全可靠、經(jīng)濟實用等特點，廣泛應(yīng)用于建筑、橋梁、隧道、地鐵等工程施工，若在門架下部安放輪子，也可以作為機電安裝、油漆粉刷、設(shè)備維修、廣告制作的活動工作平臺。
Portal scaffolding is a kind of scaffolding built in factories. It is one of the most widely used scaffolding in the world today. It can not only be used as an external scaffold, but also as an internal scaffolding or full scaffolding. Portal steel tubular scaffolding is widely used in construction of buildings, bridges, tunnels and metros because of its standardized geometry, reasonable structure, good mechanical performance, easy installation and disassembly, safety, reliability, economy and practicability. If wheels are placed under the portal scaffolding, it can also be used as mechanical and electrical installation, painting and equipment. Maintenance, advertising production activities platform.
門式鋼管腳手架的搭設(shè)一般只要根據(jù)產(chǎn)品目錄所列的使用荷載和搭設(shè)規(guī)定進行施工，不必再進行驗算。如果實際使用情況與規(guī)定有不同，則應(yīng)采用相應(yīng)的加固措施或進行驗算。通常門式鋼管移動腳手架搭設(shè)高度限制在45m以內(nèi)，采取一定措施后可達到80m左右。施工荷載取值一般為：均布荷載1.8kN/㎡，或作用于腳手板跨中的集中荷載2kN.
The erection of portal steel tubular scaffolding generally needs only construction according to the service load and erection stipulations listed in the product catalogue, and no checking calculation is needed. If the actual usage is different from the regulations, corresponding reinforcement measures or checking computations should be adopted. Generally, the erection height of portal steel tube scaffolding is limited to 45 m, and it can reach about 80 m after taking certain measures. The values of construction load are generally: 1.8kN/ of uniform load, or the concentrated load acting on the span of the scaffold plate 2kN.
門式鋼管門式腳手架是用普通鋼管材料制成工具式標(biāo)準(zhǔn)件，在施工現(xiàn)場組合而成。其基本單元是由一副門式框架、二副剪刀撐、一副水平梁架和四個連接器組合而成。若干基本單元通過連接器在豎向疊加，扣上臂扣，組成一個多層框架。在水平方向，用加固桿和水平梁架使相鄰單元連成整體，加上斜梯、欄桿柱和橫桿組成上下步相通的外門式腳手架。
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