China's mobile scaffolding material division method 1) ladder scaffold single specification steel pipe scaffold. It only uses one kind of steel pipe, such as fastener type steel pipe scaffold, and only uses 48 x 3.5 welded steel pipe. 2) scaffolding of various kinds of steel pipe scaffolds with portal type scaffolds. It consists of two or more kinds of steel pipes, such as portal scaffolds. 3) mobile scaffold with steel pipe as the main scaffold. That is to say, scaffolding consisting mainly of steel pipes and supplemented by other steel members, such as inner scaffolding with channel steel top bracket or base, and lifting scaffolding with connecting steel plates, etc.
Classification of mobile scaffolds by vertical forces
(1) force transfer by contact surface friction. That is to say, the load of the cross bar is supported by the friction reaction after the contact surface of the joint is compressed and transmitted to the vertical bar, such as the role of the fastener, which generates friction through the positive pressure of the tightening bolt.
(2) transfer force by welding seam. Most of the crossbar and vertical pole socket connection is in this way, the portal frame also belongs to this way.
(3) direct pressure transmission. This method is commonly seen in the scaffolding resting on the top of the vertical pole.
(4) the shear force of the pin. That is to say, the pin rod is connected through the vertical connecting plate of the cross bar and the hole of the vertical bar, and the pin rod is subjected to shear force on both sides.
There are 3 ways of transferring force between the vertical pole and the upright bar.
(1) bearing transfer force. That is to connect the upper and lower poles, and use connecting rods or socket pipes to ensure a good state of docking.
(2) the shear force of pin rod connected with pin;
(3) the meshing force of the screw connection. That is, the outer thread of the inner tube is engaged with the internal thread of the outer sleeve. The latter two ways of transmission are mostly used to adjust the vertical bar connection with high requirements.
Mobile scaffolds are fixed.
(1) Fixed-pitch connection: that is, the fixed-pitch setting of the connecting weld on the rod, the fixed-pitch setting of the rod length and the fixed-pitch setting of the connecting point;
(2) Uncertain distance connection: that is, the connecting part is a single unit, which can be clamped on any part of the rod through the tightening bolt.
By way of operation
(1) insert tight;
(2) tighten bolts.
标签:   脚手架 环氧地坪 环氧地坪漆 环氧地坪施工 环氧地坪翻新