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What are the factors that affect the safety of the scaffold?

2018-04-08 21:59:24
News details

In construction safety, the safety of scaffolding is the most important! There are three main factors that constitute the safety of the scaffold, the safety and reliability of the scaffold itself. Second, the safety protection measures of scaffolding; Three is the safe operation of using scaffolding. The above three factors will be explained in detail.

1. Structural construction of scaffolding.

Safe and reliable scaffolding should have enough robustness and stability, in rules allow load and climate condition, can guarantee the stability of the scaffold structure, do not shake, small sway, tilt, subsidence, collapse. To ensure the safety and reliability of scaffolds, the following basic requirements shall be ensured:

1. Stable structure.

The frame unit should be a stable structure; The frame is provided with a diagonal rod, a shear support, a wall pole or a brace. In the channel, hole and other parts that need to be increased in size (height, span) or under specified load, it is necessary to set reinforcement bars or bracing rods according to the requirements.

2. Reliable connection nodes.

The cross position of the bars shall conform to the rules of node construction.

Installation and fastening of fittings meet requirements.

The connecting wall point, bracing point and suspension point of the scaffold must be set in the structural parts that can withstand the load reliably, and the structure should be checked if necessary.

3. The scaffold foundation shall be firm and firm.

Ii. Safety protection of scaffolding.

The safety protection on the scaffold is to use safety facilities to provide safety protection and prevent the fall of personnel and objects on the shelf. Specific measures are as follows:

1. Scaffolding.

(1) safety fence and warning signs shall be set up on the job site, and no irrelevant personnel shall be allowed to enter the dangerous area.

(2) temporary support or drawing shall be provided for scaffolds that have not yet formed or have lost their structural stability.

(3) when using the seat belt, the safety rope should be set when the hanging object is fastened to the seat belt.

(4) when the scaffold is removed, the lifting or lifting facilities shall be set up to prohibit throwing.

(5) hoisting, hanging, selecting and other movable scaffolds shall be used to stabilize or reduce the movement of movable scaffolds after they are moved to the operation position.

2. Operating platform (operation surface).

(1) in addition to the highly decorated within 2 m scaffold allows you to use 2 pieces of scaffolding, other scaffolding operation shall not be less than 3 pieces of scaffolding, leave space between the scaffolding, scaffolding and metope is generally not the gap between more than 200 mm.

(2) scaffold board when butt is adopted in the length direction, the following points must be tight, its staff shall be fixed tightly small bar, shall not be put aside, lest produce sliding, small bar center to board the distance should be controlled in the range of 150-200 - mm. The foot pads at the beginning and end of the scaffold shall be securely attached to the scaffold; The lap length shall not be less than 300mm, and the starting end must be securely tied.

(3) the operation faces the protection facilities of the lateral facade.

Can be used: footboard and two protective bars:

Three railings plus peripheral plastic woven cloth (height not less than 1.0m or by step setting).

Two levers with a height of no less than 1m.

Two rails are hung with safety net.

Other reliable methods of containment.

(4) facing street and pedestrian crossing.

The scaffold is completely enclosed by plastic woven cloth, bamboo, mat, or tarpaulin.

A safety net is placed on the street and a safe passage is provided. The top cover of the channel should be covered with foot pads or other materials that can reliably undertake falling objects. On the side of the top of the street should be set above the ceiling not less than 0.8m, so as not to bounce back into the street.

A canopy shall be set for the pedestrian and transport passages that are close to or through the scaffold.

The height difference between the upper and lower scaffolds shall be made of ramps or steps and shall be protected by railing.

Safe operation of using scaffolding.

(1) the load must meet the following requirements.

The load on the operating surface (including the footboard, personnel, tools and materials, etc.), the structural scaffold shall not be more than 4KN/m2 and the scaffold shall not be more than kN/m2 when the SAP is not specified. Maintenance of scaffold shall not exceed 1kN/m2.

The load on the operating surface should be evenly distributed to avoid the load being concentrated together.

There are no more than the requirements for the scaffold floor and the number of working layers.

(4) the vertical transportation facilities (tic-tac-toe frame, etc.) and scaffold planking transport platform between layer number and load control should not exceed the provisions of the construction organization design may not arbitrarily add plating layer number and excess of heap construction materials.

The beams and couplings shall be installed with the transport and shall not be stored on the scaffold.

The heavy construction equipment (such as welding machine, etc.) shall not be placed on the scaffold.

(2) it shall not arbitrarily remove the basic components of the legs and the wall parts, and shall not arbitrarily remove the various safety protection facilities of the legs.

(3) the proper use of scaffolds.

The material on the work surface should be cleaned in time, keep the working face clear and smooth, and do not release the tool material so as not to affect the safety of the work and the damage of the object.

When the work is finished, the shelf material should be used up.

In the operation of pry, pull, push, dialing, etc., it is necessary to take the correct position, stand firm or hold the support firmly, so as not to lose the balance of the body or to throw things out.

When conducting welding operation on the operating surface, it is necessary to adopt the fire prevention measures. (specific view: fire protection requirements and measures for scaffolding)

When the rain and snow are on the shelves, the snow and water should be removed from the work surface to prevent slipping.

When the height of the working face is not enough and the height is needed, a reliable cushion should be adopted. The height of the pad shall not exceed 0.5m. When more than 0.5m, the shelf layer should be raised according to the set rules.

No vibration can be performed on the scaffold (reinforcement processing, timber sawing, use of vibrators, throwing objects, etc.).

No wires or cables shall be drawn on the scaffold without permission, and no open fire shall be used on the scaffold.