Protection measures and related matters during the process of erecting and using scaffolding
1、 Protection measures during the process of erecting and using scaffolding
1. After the completion of the scaffolding system, a dedicated person should be assigned to conduct daily structural inspections of the scaffolding, checking whether the uprights and walkway boards have sunk or become loose, whether all fasteners of the scaffolding body have slipped or become loose, and whether every component of the entire scaffolding body is intact and complete.
2. The foundation drainage work of the scaffold should be done well. After each rain, the foundation of the scaffold should be fully inspected to prevent water accumulation and sinking of the scaffold base. Scaffold manufacturer
3. The construction load of the operating layer of the scaffold should not exceed 270 kilograms per square meter. Cross bar supports, cable wind ropes, etc. should not be fixed on the scaffold, and heavy objects should not be hung on the scaffold body.
4. On the completed scaffolding system, prevent anyone from arbitrarily removing any components from the scaffolding.
5. When encountering strong winds of level six or above, heavy fog, heavy rain, and snow, scaffolding work should be immediately suspended. Before resuming work, it is necessary to check that the scaffolding has been erected and there are no problems before continuing work.
2、 Precautions for Equipment Use during Scaffolding Construction
1. The use of steel pipes and wooden ribs with outer diameters of 48mm and 51mm for scaffolding is prohibited.
2. At the main node of the scaffold, the distance between the centerline of fasteners such as horizontal or vertical horizontal bars, diagonal braces, and horizontal supports and the main node shall not exceed 150mm.
3. The length of each rod end of the scaffold extending beyond the edge of the fastener cover plate shall not be less than 140mm.
4. The opening of the docking fastener should face the inside of the frame, with the bolt facing upwards. The opening of the right angle fastener should not face downwards to ensure safety.
5. It is necessary for all personnel working on the shelves to hold certificates, wear safety helmets, and fasten seat belts.
6. It is necessary for all shelving personnel to strictly follow the construction plan during construction;
7. During construction, wall connecting components and diagonal braces should be set up in a timely manner and should not be delayed beyond two steps.
8. During the installation process, attention should be paid to adjusting the straightness of the scaffold, with a permissible deviation of 100mm.
Live load parameters for double row scaffolding, standard value for uniformly distributed live load during construction: 3.000kN/m2; Purpose of scaffolding: structural scaffolding; Simultaneously construct 2 floors. Double row scaffold foundation parameters, foundation soil type: plain fill soil (lightweight penetration hammer with 20 blows); Standard value of foundation bearing capacity (kPa): 115.00; Bottom area of pole foundation (m2): 0.20; Adjustment coefficient of foundation bearing capacity: 1.00 (for laying concrete at the bottom of the frame and surrounding drainage ditches).
The wind load parameters of the double row scaffold are located in Suzhou, Jiangsu Province, with a basic wind pressure of 0.4kN/m2; Wind load height variation coefficient? z， When calculating the strength of connecting wall components, take 0.92, and when calculating the stability of vertical poles, take 0.74. What is the wind load shape coefficient? S is 0.214.
The standard value of the structural self weight per meter of the vertical pole supported by the static load parameters of the double row scaffold (kN/m) is 0.1248; Standard value of self weight of scaffold board (kN/m2): 0.300; Standard value of self weight of railing toe board (kN/m): 0.150; Safety facilities and safety net (kN/m2): 0.005; Scaffold board category: bamboo fence piece scaffold board; Type of railing barrier: bamboo fence piece scaffold board barrier; Standard value of self weight per meter of scaffold steel pipe (kN/m): 0.033; The total number of layers for laying the scaffold board is 20.
The height of the double row scaffold is 36m, with double tube uprights used below 12 meters and single tube uprights used above 12 meters; The installation dimensions are as follows: the horizontal distance Lb is 1m, the vertical distance La is 1.5m, and the step distance between the large and small horizontal bars is 1.8m; the distance between the inner rack and the wall is 0.25m; the large horizontal bar is on top, and there are 3 large horizontal bars overlapped on the small horizontal bar; The type of steel pipe used is Φ 48 × 3.0; The connection method between the horizontal bar and the vertical bar is double clip; Take the anti sliding bearing capacity coefficient of the fastener as 1.00; The wall connecting components are designed with two steps and two spans, with a vertical spacing of 3.6 meters and a horizontal spacing of 3 meters. They are connected using pre embedded flat iron.
