Design drawing of Zhoushan towering cantilever unloading platform
Allowable load: construction live load 2KN/㎡, concentrated load 10KN.
Cantilever steel unloading platform
1. In principle, it is forbidden to use floor-standing unloading platforms on the construction site, and the tool-type and shaped cantilever unloading platforms made of steel materials are actively promoted.
2. I-beam or channel steel or above. 16 is adopted for the main beam and secondary beam of the cantilever unloading platform, and boards with a thickness of not less than 50mm are laid and fixed by bolts. Cantilever unloading platform must be supported on the building, and shall not be connected with scaffolding, and shall not move back and forth or sway from side to side.
3. The cantilever beam of Jingfeng standardized cantilever unloading platform extends into the building at least 1m, and at least two parts are fixed on the building structure with steel bars or bolts not less than φ 16; Cantilever beams on both sides are hoisted and unloaded with two steel wire ropes with diameters above φ 14. The upper connection points of steel wire ropes must be fixed on the building structure, and it is forbidden to set them on construction equipment such as masonry walls or scaffolding. The steel wire rope around the sharp corner of the building should be padded, the outer opening of the unloading platform should be slightly higher than the inner opening, and the installation should be stable.
4. The unloading platform must be equipped with protective railings and fenders according to the requirements of limb operation. Upper pole height 1.2m, lower pole height 0.6m, fender height not less than 18cm. Railings must be covered with dense mesh safety nets from top to bottom.
5. After checking and calculation, the unloading platform should be equipped with four rings made of Q235 steel. (Rings should be embedded in the main structure, the embedding depth and anchorage length should meet the specified values, the clear height of rings on the concrete surface should not exceed 5-6 cm, and the direction of rings should be perpendicular to the floor).
6. The included angle between the steel wire rope of the discharging platform and the horizontal cantilever beam should be 45-60. When the steel wire rope of the unloading platform is fixed with rope clips, there should be no less than three fixed rope clips, and the length of the last rope clip from the rope head should not be less than 140 mm ... A rope bend should be set between the last rope clip and the second rope clip. The rope clamping saddle (splint) should be on the stressed side of the wire rope when loaded, and the U-shaped bolt should be at the end of the wire rope, and it is not allowed to stagger. After the rope clamp is fixed for the first time, it should be tightened again after the wire rope is stressed until the diameters of the two ropes are even 1/3.
7. Hang the unified weight limit sign of the branch company on the platform: indicate the load limit tonnage and the person responsible for acceptance, maintenance and installation. It is forbidden to overload or pile materials for a long time and hang them with the pile; The height of stacked materials shall not exceed the height of platform guardrail; The number of workers is limited to 1-2, and it is forbidden to use the platform as a rest platform; The total weight of construction personnel and materials on the platform shall not exceed the design allowable load.
8. The entrance and exit of the discharging platform must adopt the required hard protection.
9. Jingfeng standardized unloading platform, after the completion of construction, must be accepted by construction technicians and full-time safety management personnel, confirm that it meets the design requirements, sign opinions and go through the acceptance procedures before it can be put into use.
Jingfeng standardization engineers agree that the design size of high-rise cantilever unloading platform in Zhoushan site needs to be carefully checked, and the specific data should be determined according to the actual situation of the project. If the quotation of cantilever unloading platform is involved, please contact the cooperative manufacturer for consultation.
Cantilever landing unloading platform