Specification and construction safety rules of steel pipe scaffold in building construction?

48mmX3.0mX6m is a national standard, but you should pay attention to it when buying shelf tube. Generally speaking, you say you are 3.0 thick, but the pipe is poor, just a matter of how much. The difference is 2.5, the difference is 1.

The standard of 1 1 floor is definitely enough. In the south, most people use 2.75 to build 20 floors, and the prices are basically the same.

Scaffolding specification 1

Scaffolding construction safety specification is:

The first section fastener type steel pipe scaffold

Keywords scaffold specification, scaffold construction scheme, portal scaffold specification, portal scaffold construction scheme, mobile scaffold specification,

This technical standard is applicable to the erection of external scaffolding with steel pipe fastener frame as the main body and bamboo pole as the guardrail.

First, the construction preparation

1, material

(1) Steel pipes: hot rolled seamless or seamed steel pipes with a diameter of 48 or 5 1mm and a wall thickness of 3 ~ 3.5 mm are used as main columns, main rails, small rails and diagonal braces.

⑵ Connectors: rotary buckle, right-angle buckle, butt buckle and barge core.

(3) Foundation: made of φ40 steel pipe and 4 ~ 5 mm steel plate, which is used as the foundation of the main column. The floor area of the base should not be less than 200c? .

(4) Scaffolding: bamboo, wood or steel scaffolding.

2. Fuck oak parts

(1) According to the engineering characteristics and construction requirements, prepare the scaffold erection scheme.

The position of the scaffold has been cleared.

(3) Soft soil foundation has been reinforced.

Second, the operation process

1, main column

(1) The main column shall be made of steel pipe without serious corrosion and bending deformation.

⑵ The longitudinal spacing of main columns should not exceed 2m. Eight-story buildings are generally used below 30m, and erection schemes should be provided for more than eight stories. The spacing between inner and outer columns of double bent frame is 0.8 ~1.2m. When the inner column is 20cm away from the wall, a safety net must be hung under the flat bridge. In case of decorative lines, you can also lengthen the small bars of the inner columns appropriately to make a bamboo array.

(3) When the main column is erected, a temporary supporting fixed column is set, and the column foot is set on the base. When the load of the column exceeds the foundation reaction force in the bearing area of the foundation, thick plates or concrete pads should be placed under the foundation.

(4) After the main column is erected, the column feet in the same plane shall be firmly connected with steel pipes or bamboo poles. Column barges should be staggered, not all on the same horizontal plane.

5. An auxiliary column (commonly known as "pin column") is arranged between the main column of the double bent frame and the main column of the single bent frame. Auxiliary columns are generally bamboo poles, and the spacing is not more than1m. They are set upward from the first main rail (bottom beam) and fixed on the main rail with bamboo poles (note: more than three main rails must be made before the auxiliary columns can be erected.

[6] Extension of main column: first insert the barge core into the top of the installed column, then sleeve and straighten the installed column, then install butt joint at the joint and tighten the bolt.

2, ledger

(1) The main rail shall be made of steel pipe without bending deformation. Use right-angle fasteners to connect the main rail with the main columns arranged longitudinally. Fasteners should be firm and straight, and form a 90-degree angle with the main column.

⑵ The vertical spacing of the main rail is not more than 2. 1m, and two rows of bamboo poles are bound between the main rails every 2 degrees outside the scaffold as a safety fence. High-rise buildings are using scaffolding boards of about 1.2m to protect their feet and hang safety nets.

(3) The extension of the main rail is the same as that of the main column.

3. Small bar

(1) Short steel pipes with no serious corrosion and bending deformation shall be used for the putlog. The two ends of the small bar are connected with the main columns in the inner row and the outer row respectively with right-angle buckles, and the buckles should be stable and form a 90-degree angle with the main column and the main crossbar.

⑵ The horizontal spacing of putlog is not more than 1m, and the vertical spacing is not more than 2. 1m (the height of flat bridge).

4. exciting

(1) Set diagonal braces with straight steel pipes. Steel pipes with severe corrosion, bending, warping and obvious surface depression shall not be used.

⑵ Bracing should be connected with the intersection of scaffold main column and large and small crossbar, and should not be supported at non-stress points. The diagonal brace is connected with the scaffold bar through the rotary buckle.

(3) For the setting methods of various braces, refer to the practices specified in Section 2 (2)-4 of this chapter.

5. Pingqiao

(1) The flat bridge is supported on the small bar. When laying steel scaffolding, arrange steel pipe pairs vertically on the small bar and fasten them with right-angle fasteners. The spacing of dragons (including the main rail) shall not be greater than 400 mm, scaffolding shall be erected on dragons, and lead water lines shall be used to tie them firmly.

(2) When laying bamboo scaffolding, (the putlog should be fastened with right-angle fasteners on the dragon surface of the longitudinal steel pipe, and tied with bamboo and dragons in the longitudinal arrangement on the putlog surface). Refer to the flat bridge practice described in Section 2 (2) 6 of this chapter.

6. Oblique bridge

(1) Steel pipes are used for columns, railings, cross bars, step bars and other parts of skew bridges. The deck of a skew bridge can be made of steel, bamboo or wooden scaffolding.

(2) The inclination of the skew bridge is not greater than "BID 5" (i =1:2); The longitudinal column spacing is not more than 2m, and the transverse column spacing depends on the bridge width; The straight dragon spacing shall not be greater than 45cm, and the step spacing shall not be greater than 30cm.

7. Platform

The columns and bottom supports (railings) of the platform are made of steel pipes, and the spacing is generally 2m. The intersection of the column and the bottom support is fixed with right-angle fasteners. Please refer to 8 for the method of dragon, bamboo array and panel supported by bottom bracket. (2)-(4) in the second section of this chapter.

Third, the quality standard

1, guaranteed project

(1) Scaffolding columns should be vertical, and large and small cross bars should be upright.

⑵ All kinds of connecting fasteners must be fastened firmly to prevent the rods from slipping.

(3) The joints of two adjacent columns must be staggered and not in the same step.

(4) The joints of two adjacent main rails inside, outside, up and down must be staggered and shall not be connected between a group of main columns.

5] erection of cross brace, a diagonal should be buckled on the main column, the other should be buckled on the protruding part of the small bar. The distance between the fasteners at both ends of the diagonal bar and the vertical rod node is not more than 20cm, and the connection point between the diagonal bar at the bottom and the main column is not more than 50cm from the ground.

[6] The quality requirements of flat bridges, skew bridges and platforms are the same as those in the second section of this chapter.

2. Allowable deviation

See table12-1for the allowable deviation of fastener-type steel pipe scaffold erection.

Fourth, the construction matters needing attention

Main safety technical measures

(1) When the scaffold height is less than 7m, a wind brace shall be set every 5 ~ 6 main columns. See Section 4, Section 2 (2) of this chapter for details. ( 1).

2 scaffold height more than 7m, can't set the wind brace, must set up even the wall pole. See Section 2 (4)-2 of this chapter for details.

(3) The cross-extending end of each steel bar should be greater than 10cm to prevent the steel bar from sliding.

(4) Butt buckles used to connect the main rail should avoid opening upwards to prevent rainwater from invading.

5] Fastener bolts should be tightened properly, and the general torque should be controlled at 40 ~ 50n? About m.

[6] After heavy rain or shutdown for a period of time, the scaffold must be thoroughly inspected. If deformation and subsidence are found, the steel members are seriously corroded and the connecting buckle is loose, it can be used only after reinforcement and maintenance in time.

Section 2 Bamboo Scaffolding

This technical standard is applicable to external scaffolding built of bamboo and wood.

First, the construction preparation

1, material

(1) logs, boards, bamboo, bamboo poles and other materials.

2 bamboo or wooden scaffolding.

(3) No.4 (No.8) water diversion line, yard, etc.

2. Fuck oak parts

With the first section of this chapter.

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