Second, the setting of the shelf
1. Pole and crossbar settings
(1) Double row outer scaffolding
When constructing double-row scaffolding, the step distance of the vertical bar is 1.2m. The step distance of the pole is 1.8m. The longitudinal spacing of the pole is determined according to the specific requirements of the building structure and working load. 0.9m, 1.2m, 1.5 can be selected. m, 1.8m, 2.4m and other sizes, and the corresponding crossbar, the general construction of double-row scaffolding.
In the case of a curved arrangement, a cross-bar trapezoidal group frame of different lengths and a cross-parallel quadrilateral group frame of different lengths can be combined and combined to form an arbitrary curve sub-frame having a curvature radius greater than 1.7 m. Its layout.
(2) Single row outer scaffolding
When constructing single-row outer scaffolding, the length of single-row bar is 1.4m and 1.8m. The distance between the pole and the wall of the building can be adjusted within the range of 0.7-1.5m according to the specific requirements of the construction. Scaffolding step The distance is generally 1.8m, and the vertical length of the pole is selected according to the working load requirements of five sizes of 2.4m, 1.8m, 1.5m, 1.2m and 0.9m. The single row of bowl-type scaffolding is most easy to arrange the curve. The two single cross-bar corners are arbitrarily set between 0° and 30°, and the angle between the two longitudinal cross-bars is arbitrarily set between 150° and 180°. Especially suitable for round buildings and structures.
2. Right angle cross
For the outer scaffolding of a typical square building, the two horizontally intersecting bays at the corners should be joined together to increase the overall stability of the scaffolding. There are two types of connection, one is direct splicing and the other is right angle lap joint.
3. Slanting rod setting
The inclined rod can enhance the stability of the scaffold, and its reasonable arrangement is of great significance for improving the bearing capacity of the scaffold and ensuring construction safety. The inclined rod is a tension and compression rod, and the arrangement direction can be arbitrary. Under normal circumstances, the inclined rod should be connected with the node of the scaffold as much as possible, or it can be staggered. For scaffolds with a height of less than 30m, the frame area of the inclined rod can be set according to the load condition. The total façade area is 1/2 to 1/5; for high-rise scaffolds with a height of more than 30m, the frame area of the slanted bar is not less than 1/2 of the entire frame area. Slanted bars must be provided at the corners and ends of the corners, and the middle can be evenly spaced.
4. Wall pole setting
The connecting rod is the connecting part between the scaffold and the building, which plays an important role in improving the lateral stability of the scaffold and bearing the eccentric load and horizontal load. Under normal circumstances, for scaffolding with a height of less than 30m, one can be set up in three steps (about 40m2); for high-rise and heavy-duty scaffolding, it should be properly encrypted. Scaffolding below 50m should be arranged at least three steps in three steps. 25m2); scaffolding above 50m should be arranged at least three steps (about 20m2). The wall pole setting should be connected as much as possible in the cross-bar layer bowl buckle joint, which is perpendicular to the scaffolding and the wall, and is set in time with the rise of the building and the shelf, and the plum blossom arrangement is adopted as much as possible.