What Are Scaffolding Jacks?

Frame-combined scaffolding is the most commonly used as double-row scaffolding and shelf-type scaffolding. Because of its good resistance to longitudinal bending and easy assembly and disassembly, it is comprehensively evaluated from safety, economic and working performance, and as a complete supporting performance of the system, it is not excessive to call it a masterpiece of temporary structure. .

Building frames can be divided into three types: standard frames, simple frames and wide frames according to their specifications, shapes and uses.

1. Standard framework. The width of the frame is 900-1250mm. It can be used to construct a frame combined scaffold for heavy operations such as temporary stacking of materials.

2. Simple frame. The width of the frame is more than 400mm and less than 900mm. It is often used in the construction of urban blocks because of the site relationship, it is difficult to use a standard frame to set up a frame combined scaffolding.

3. Widened frame. When it is used to set up a frame-type combined scaffold, it needs to be widened in the middle of the installation height. At this time, the widening rate of the building frame width should be controlled within 40%. ^[1]

The beam frame is horizontally erected on the building frame. In addition to serving as a support point for laying scaffolding, it is also a horizontal structural component constituting a frame-type scaffold. Structure and specificationsThe beam frame is composed of large crossbars, small crossbars and U-shaped ring pins

In order to use the beam frame as a workbench, scaffolding must be laid side by side on it. However, this is not the case for beam frames with planks, whose scaffolding is made entirely of steel and processed into the shape of the beam frame. Because U-shaped ring pin metal parts are installed at the four corners of the beam frame, the worktable can be formed by itself. It depends on

When the foundation elevation and height difference exist, in order to keep the building frame height of each floor consistent, a jack-type base metal piece can be installed under the foot of the bottom building frame for leveling. The structure of the jack is stipulated that the adjustment range of the screw part should be 30-350mm. Even when it reaches the highest ceiling height, the depth at which the top end is inserted into the steel pipe of the building frame must be above 95mm. The end of the jack rod should be 2-3 mm thinner than the inner diameter of the steel pipe to allow easy insertion into the foot column steel pipe. The jack rod thread should be made into a trapezoidal square thread with a pitch of 6mm or more. The thickness of the bottom plate is more than 5.4mm, and the size should be more than 120 °. When some buildings are inclined or recessed, it is necessary to set up a work table that extends outward from the scaffold when it is a distance from the scaffold to the wall. However, this extended workbench listening stand is typically a cantilever frame. Recently, it has also been adopted in safety facilities for high-altitude operations. ^[2]