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Steel pipe fastener scaffold is one of the main construction tools in construction, such as bracket template, external scaffolding, decorative coating and so on need to set up a good scaffold for operation. If the steel pipe fastener scaffold is not properly erected and is not firm, it is easy to cause engineering casualties, so the structure and erection quality of the certified scaffold are handled, then let's understand the problems existing in the erection of the steel pipe fastener scaffold together!

Quality standard for 1. steel pipe fastener scaffold and fastener

1. Steel pipe: "Code" stipulates: "scaffolding steel pipe should be used in the current national standard" straight seam welded steel pipe "(GB/T3092 provisions of the No. 3 ordinary steel pipe. Its quality is in line with the current national standard "carbon structural steel" (GB/T700 Q235-A grade steel regulations. The mass of one steel pipe for scaffolding shall not exceed 25kg. American 483.5 steel pipe shall be used. The surface of the steel pipe is flat and smooth, without cracks, delamination, misalignment, hard bending, burrs, indentations and deep cuts. It is forbidden to drill holes on steel pipes and apply anti-rust paint.

2. Fasteners: The Code stipulates: "Fastener-type steel pipe scaffolding shall be made of wrought iron fasteners. The material shall conform to the current national standard "steel pipe scaffold fastener" (GB15831 provisions. 'Old fasteners should be checked for quality before use. Cracks or deformation are strictly prohibited. Replace the slippery bolts, and carry out antirust treatment for new and old fasteners.

Problems Existing in 2. Steel Pipe Fastener Scaffold Assembly

1. Assembly Scheme and Design Calculation without Scaffold

During the inspection, it was found that some sites had no plans. There is a plan, but the preparation is too simple, the calculation is wrong, without approval, can not guide the field project. In addition, the construction personnel only need to make oral handover to the operators, and then start to work blindly, which seriously violates the provisions of the "code" "in accordance with the requirements of scaffolding in the construction organization design" and the special construction scheme of the regulations on the management of production safety of construction projects.

2. The installation of the base does not meet the requirements.

The Code requires that "wooden pads with a length of more than 2 spans and a thickness of more than 50cm shall be used, and channel steel can also be used". However, during the inspection, we only saw that the lower end of the scaffold catch rod at the bottom of many site scaffolds was covered by small trees and short boards. After the scaffold is erected and used, the load gradually increases. Affected by the climate such as wind and rain, the foundation is not firm, the shelf body is unevenly settled, and it is easy to deform.

3. Stem connector not offset

The inspection showed that during the assembly process of some construction sites, the vertical poles were not strictly carried out in accordance with the specifications, and the old method was used to stagger adjacent vertical poles, which did not conform to the regulations that the built-in vertical pole joints were offset by more than 500mm in the height direction during the same period, and the frame strength was less than 4. Knife handle not set as specified

The "Code" stipulates: "Double-row scaffolding with a height of 24m or more shall be continuously provided with tool supports on the full height of the outer side". The inspection shows that there are problems in some construction sites, such as insufficient span, discontinuous, not through and not fixed, which can not play a role in stabilizing the support. In addition, according to the "specification", the overlapping length of the inclined bar of the knife handle is 1m, but there are only 400~500mm in length, only two fasteners are connected. In addition, the scaffold has been 5, 6 steps or all assembled, and there are no knives, which are supplemented after being urged.

5. Unreasonable installation of each wall

The Code stipulates: "For double-row scaffolding with a height of 24m or more, rigid wall materials shall be used to connect with the building." On the construction site found during the inspection, there were too few settings on each wall, or flexible joints were used, resulting in unstable brackets. It was found that there were also construction sites that were not closely connected with buildings and had no effect at all.

6. The setting of the small bar is unreasonable

It is stipulated in the specification that the main node of the frame body adjusts the small cross bar, but some construction sites adopt the method of installation at separate roots. Although it only saves materials, it will cause certain risks on the whole. In addition, the setting of the small crossbar also considers the laying of the shelf, and cannot violate the specification of "the sum of the protruding lengths of the two scaffolding boards is less than 300mm.

7. The setting height of steel pipe fastener scaffold rack is not enough

The "Code" stipulates: "The front end of the valve stem should be 1 meter higher than the parapet epithelium and 1.5m higher than the mouth epithelium of the eaves". The main purpose is to ensure the safety of construction personnel, but the test shows that some scaffolding on the construction site is not synchronized with the construction, which is lower or flat than the operating floor, and has a greater risk of accidents.

8. Safety net hanging is not standardized

Some construction site safety nets are made of unqualified materials, tied up poorly, the two nets are blocked, and the hanging methods are inconsistent. In addition, there are too many broken holes in the dense mesh, and there is no protective effect. Part of the site is not required to install safety vertical net, flat net. During the construction of super high-rise buildings, protective nets shall be set up inside the nets to prevent objects from being hit.

9. Inadequate security protection

The "Code" stipulates: "Steel pipe fastener scaffolding shall be laid stably, 120~150mm away from the wall surface, calculated from the scaffolding board on the top working layer, and the scaffolding board shall be laid every 12m." In fact, some sites fail to do so. Even if there are no shelves, there are square materials or steel molds instead of shelves. Although there are shelves in part of the working layer, there are many probe plates. If they are not bound by iron wires, people can easily fall off.

10. Inspection and Acceptance

The Code stipulates: "The scaffold and foundation of steel pipe fasteners shall be inspected and inspected in the following stages. After the foundation is completed and before the scaffold is erected; before the operation layer bears the load; after each ride of 10m ~ 13m to reach the design height after encountering 6-level heavy rainfall, after freezing in cold areas; stop working for more than one month". During the inspection, it was found that some construction sites have not been implemented according to regulations. When checking the safety management data, the scaffolding inspection and inspection data cannot be seen, and the scaffolding has been put into use. In addition, some construction sites have acceptance materials, but they are not accepted at different levels, and there is no signature of the person in charge and the inspector, which cannot play a role as a witness.

The above introduction is the steel pipe fastener scaffold in the erection of the problems, if you need to know more, you can contact us at any time!