1, the height of cantilever scaffold should not exceed 20m.

2. The steel cantilever beam should be made of steel with double axisymmetric cross section. Such as I-beam, I-beam has reliable structural performance, double axisymmetric section and good stress stability, which is more convenient than other steel beams in procurement, design and construction.

3. The model and anchorage of the cantilever steel beam shall be determined according to the design, and the section height of the steel beam shall not be less than 160 mm ... The end of the cantilever beam shall be fixed with the reinforced concrete beam and slab structure in two or more places. The diameter of the U-shaped steel bar pull ring or anchor bolt used for anchoring the steel cantilever beam should not be less than 16㎜.

4. The U-shaped steel bar pull ring or bolt for anchorage should be formed by cold bending. The gap between the U-shaped reinforcement pull ring, the anchor bolt and the section steel shall be wedged with steel wedge or hardwood wedge. The outer end of each steel cantilever beam shall be provided with a steel wire rope or steel tie rod obliquely connected with the superstructure. Wire rope and steel tie rod do not participate in the stress calculation of cantilever steel beam;

5. The rings bound with steel wire rope to the building structure should adopt HPB235 steel bar, the diameter of the steel bar should not be less than 20mm, and the embedded anchorage length of the rings should meet the current national standards.

6. The cantilever length of cantilever steel beam shall be determined according to the design, and the length of fixed section shall not be less than 1.25 times of the cantilever length. The fixed end of the steel cantilever beam shall be fixed on the beam plate of the building structure by two or more U-shaped steel bar pull rings or anchor bolts. U-shaped steel bar joints or anchor bolts should be embedded in concrete beams and bottom steel bars, and welded or bound firmly with concrete beams and bottom steel bars, and the anchoring length should meet the current national standards.

7. When the anchoring position is set on the floor, the floor thickness should not be less than 120mm. If the floor thickness is less than 120mm, reinforcement measures should be taken. The cantilever end of the steel cantilever beam shall be provided with anchor points that can reliably fix the scaffold upright and steel beam, and the anchor points shall be not less than 100mm from the end of the cantilever beam.

Extended data:

The beam frame in folk architecture not only has structural functional significance, but also has structural beauty and decorative beauty. The beam frame is mainly composed of columns, beams, Fang and other components, and each component has a specific decorative technique to adapt to it. In folk architecture, the beam frame often adopts the method of "top-down exposure", which is exposed outside, or wins by decoration, and the main color is colored painting, sculpture and so on. Or "plain to the sky" to show the true beauty of materials and structures.

The beam is supported by columns or other frames under the eaves, and its basic cross section is rectangular. On this basis, there are many shape changes, forming a variety of beams, such as moon beam, Taiping fruit, hat beam and so on. Beams with different structural positions are given different names, such as robe head beam, pointed beam, smooth beam, grilled beam, pod beam, old angle beam and young angle beam. All kinds of beams are often decorated with wood carvings and colorful paintings.

Square is a kind of wooden component installed between the capitals, sparrows and bucket arches, which is used to pull and connect all parts horizontally. The flat Fang, which is located above the big Fang and used to support the bucket arch, is called the flat Fang. In addition, there are Jin Fang, Ji Fang, Sui Liangfang, Zheng Xinfang and Interlaced Fang. Fang is the key part of eaves decoration. The forehead Fang between eaves columns is often painted or carved, and the top is made in the style of "overlord boxing".

Baidu Encyclopedia: Suspended Beam Frame