The anchorage length of the rear end of the cantilever unloading platform is more than 5

Cantilever discharge platform.

Rear end anchorage length.

It is advisable to use rice. The cantilever discharge platform specification states that the stacking load is calculated and determined according to the design of the discharge platform. According to the current code, "Technical Code for Safety of Work at Height in Building Construction.

JGJ80-1991 Appendix V, is in accordance with the considerations. Due to the earlier nature of this specification, it is currently all section steel.

Cantilever unloading platform, if the design calculation is passed, the value can be larger.

The material platform is made of 16 channel steel, the width is meters, the length is meters, the wooden board with a thickness of 5cm is paved, the wire rope anchor of F17 is adopted, and 100*100 holes are left on the roof of the structure at the junction of the structure, and the wire rope buckle is used to connect with it.

Precautions. 1.The production of the unloading platform should be carried out by a professional welder.

2.The required weld shall not have desoldering, missing welding, and the weld shall be full.

3.The planks on the platform should be covered with a full layer and tied with 8 lead wires.

4.The height of the protective railing should not be less than meters, and the inner side should be hung with a dense safety net.

5.The anchor buckle of the wire rope should meet the requirements of the specification.

6.Before the installation of the material table, it is necessary to check whether the connection between the anchor ring and the structure is reliable and whether there is any looseness, and the installation can only be carried out after confirmation.

7.When hoisting the unloading platform, the four wire ropes used for lifting should be of the same length to ensure the smooth installation of the platform.

8.When hoisting, the signalman should work closely with the installer to ensure safety.

9.For the sake of insurance, the unloading platform should be hung with an obvious load limit sign, and the load limit requirements are.

First of all, you have to distinguish between the problem of cantilevered scaffolding.

The cantilever table uses the tensile force of the steel wire to resist the gravity of the goods, that is, the wire rope is hard, and the cantilever section steel is not a real cantilever member; The cantilever scaffold is to work with the bending and shear resistance of the cantilever section steel. The wire rope is just a protective device.

Therefore, there is no safety proportion factor problem at the rear end anchorage of the cantilever material table, as long as the rear anchorage is fixed so that the horizontal direction can not slide, and the size of the section steel extending into the floor should be calculated to determine the stability, and the beam that is hinged at one end fixed at one end can be calculated. So under normal circumstances, as long as it is kept more than 500mm.

There are no strict requirements for this, and this is not considered the anchorage length, because its constraints are very small, and some even weld two channel steels below the main beam to form a stable small 3 corners, and then directly put it on the beam (plate, shear wall). However, most of the embedded steel bars limit their left and right movement, and this is not calculated and experienced. If there is only one anchorage length, it is the lifting ring connected with the cable-stayed wire rope, which is mostly embedded in the beam, the diameter can be calculated, and the anchor is 30d.

There are no specific requirements for this specification, and the outer edge of the structure drawn on the legend of Glodon Secure Computing Software is tens of centimeters away from the anchor anchor section of the anchor to see what the local requirements are. It is best to consult with the safety supervision department, who often inspect the site and have a clear understanding of the local requirements.

It feels like it should be the same length as the cantilever scaffold I-beam, but in fact, the cantilever section is very long, and the upstairs space is not enough if the anchorage is theoretical. We didn't fix the steel ring, we just pulled it by the wire rope, and there was an anti-slip section steel at the bottom.

The latest specification of the cantilever unloading platform, the animation of the construction process.

The anchorage part is greater than or equal to meters.

I don't really understand what you're talking about, can you explain it plainly?

The cantilever unloading platform has no anchorage except for the anchorage length of the embedded lifting ring.

If the ring is made of first-class rigidity, the anchor is 30d, and the diameter of the bent ring is not less than 3d.

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Pro-specification requirements: the ratio of cantilever length and anchorage length shall not be greater than the design size of the 2:1 cantilever unloading platform: the steel platform is long and 2m wide, the main and secondary beams are made of 16 I-beams and 18 channel steel, and the wire rope is made of 20mm in diameter, and the specific size can be customized.

Allowable load: construction live load 2kN, concentrated load 10kN (1) In principle, it is strictly forbidden to use the floor-type unloading platform, and actively promote the use of steel materials made of tool-type and stereotyped cantilever unloading platform; (2) The cantilever unloading platform shall be used as the main beam and secondary beam with more than 16 I-shaped virtual steel or channel steel, and the wooden board with a thickness of not less than 50mm shall be laid on the board, and the wooden board shall be fixed with the cantilever beam with bolts, and the cantilevered unloading platform shall be rested on the building, shall not be connected with the scaffolding, and shall not move back and forth and shake left and right; (C) the cantilever beam of the cantilever unloading platform extends to the part of the building shall not be less than 1 meter, and the part of the building structure shall not be less than 2 places with no less than 16 steel bars or bolts; The cantilever beam on both sides should be used respectively with 2 more than 14 wire ropes for lifting and unloading, and the upper part of the wire rope tie point connector must be fixed on the building structure, and it is strictly forbidden to be set up on construction equipment such as masonry wall or scaffolding; The wire rope of the building should be lined with soft cushions, and the outer mouth of the unloading platform should be slightly higher than the inner mouth, and the installation should be stable; (4) The unloading platform must be set up in accordance with the requirements of the edge operation of the protective railing and foot guard, the height of the upper rod is, the height of the lower rod is, the height of the foot guard is not less than 18cm, and the railing must be hung from top to bottom with a dense safety net; (5) The unloading platform should be provided with 4 collars that have been checked, and the hoop wheel should be made of Q235 steel bars. (The ring should be embedded in the main structure, the embedded depth and anchorage length meet the specified value, the net height of the ring does not exceed 5-6cm on the concrete surface, and the direction of the ring is perpendicular to the floor); (6) The angle between the wire rope of the unloading platform and the horizontal cantilever beam should be 45°-60°.

When the wire rope of the unloading platform is fixed with a rope clamp, there shall be no less than 3 fixed rope clamps, and the length of the last rope clamp from the rope end shall not be less than 140mm. A rope bend should be set between the last rope card and the second rope card. The rope clamp saddle (splint) should be on the side of the wire rope when it is loaded, and the "U" bolt should be at the tail end of the wire rope, and should not be staggered.

After the rope clamp is fixed for the first time, it should be tightened again after the wire rope is stressed, and it should be tightened to flatten the diameter height of the two ropes 1 3;Hope mine can help you <>

Do you have any other questions?

Summary. Hello dear, <>

There are regulations, the length of the fixed end is not less than the times of the cantilevered end, and the cantilevered end is generally the distance from the inner pole to the wall plus the width of the frame body plus the length of the end about 5 10cm long, and the total number plus the total number is multiplied by the total length of the cantilever channel steel.

Is the length of the fixed section also a double of the length of the cantilever section of the cantilever discharge platform?

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Is the length of the fixed section also a double of the length of the cantilever section of the cantilever discharge platform? There are regulations, the length of the fixed end is not less than the times of the cantilevered end, and the cantilevered end is generally the distance from the inner pole to the wall plus the width of the frame body plus the length of the end about 5 10cm long, and the total number plus the total number is multiplied by the total length of the cantilever channel steel.

I'm asking about the unloading platform?

Hello dear, I have seen your question and am sorting out the answer, please wait a while Hello dear, <>

The secondary beam is 14 I-beam, and the spacing is 800mm. On the bottom surface of the unloading platform, a 5cm thick wooden board is laid (or a wooden fang is laid on the secondary beam first, with a spacing of 150mm, and then a 18-thick formwork is laid). When the unloading platform is erected, the primary and secondary beams should avoid the outer scaffold pole, the steel pipe of the outer scaffold pole directly passes through the unloading platform, the outer scaffold horizontal rod avoids the unloading platform, and the encrypted horizontal rod is supplemented at the adjacent position.

It is strictly forbidden to connect the unloading platform and the outer scaffolding frame body together. At the anchor end of the I-beam of the unloading platform, the U-shaped bolt and the I-beam should be clamped tightly with a wooden wedge to prevent the I-beam from retracting under the oblique tension of the wire rope.

The meaning of the cantilever unloading platform times means that the anchorage length behind the cantilever length is a multiple of the cantilever length, if there are no special requirements for the design, generally speaking, the length of the anchorage length is a multiple of the cantilever length can meet the requirements. For example, if the cantilever length is 1 meter, then the anchorage length is the length of the meter, so generally speaking, the construction is carried out in this proportion.

When the construction structure of the construction project is constructed, the lifting of the formwork is basically the temporary cantilever unloading platform.

The dump platform is a dangerous way to pass through the scaffolding and protrude from the outer edge of the building. What are the requirements of the specification for the unloading platform?

In principle, his full name should be cantilevered operating platform.

1. In terms of specifications, there are three mandatory requirements for the operating platform:

1. The shelving point, tie point and support point of the operating platform should be set on a stable main structure and should be reliably connected;

2. It is strictly forbidden to set up the operation platform in temporary facilities.

Above; 3. The structure of the operating platform should be stable and reliable, and the bearing capacity should meet the design requirements.

Cantilevered operating platform.

2. Node requirements:

1. The cantilever length of the cantilevered operating platform should not be greater than 5m, and the uniform load should not be greater than that', the concentrated load should not be greater than 15kN, cantilever beam.

It should be anchored and fixed.

Weight limit. 2. 4 lifting rings should be set on both sides of the operating platform (the diameter of the lifting ring is normal 20 and above), and the lifting ring should be designed according to the general lifting ring or lifting lifting eye, and should meet the strength requirements. The connecting rings on both sides of the platform should be connected with the front and rear two cable-stayed wire ropes, and the angle between the wire rope and the steel beam is 45 degrees, and each wire rope should be able to carry all the loads on this side.

Two rings. 3. The wire rope should be connected by a special wire rope clamp, and the number of wire rope clamps should match the diameter of the wire rope, and there should be no less than 4. The wire rope around the sharp angle and sharp mouth of the building should be lined with soft cushions.

Wire rope clamps. The wire rope corresponding to the wire rope clamp.

The wire rope corresponding to the wire rope clamp.

4. The outer side of the cantilevered operating platform should be slightly higher than the inner side; Protective railings should be installed on the outside and protective baffles should be set up to be fully enclosed.

Cantilevered operating platform.

5. The operating platform should be made of section steel as the main and secondary beams, and the wooden planks with a thickness of more than 50mm should be paved and fixed.

Indoor fixation.

Steel. 6. The most important point is that the cantilevered operating platform should be structurally designed, and the calculation should comply with the provisions of the specification, and the process is too complex, as described separately.

As long as the project management personnel remember the above content, the inspection of the cantilever operating platform can be done in mind.

The unloading platform is made of 16 channel steel, the width is meters, the length is meters, the wooden board with a thickness of 5cm is laid on it, the wire rope anchor of F17 is adopted, and the 100*100 holes are left on the roof of the structure at the junction of the structure, and the wire rope buckle is used to connect with it.

The cantilever unloading platform specification stipulates that the stacking load is determined according to the slow calculation during the design of the unloading platform. According to the current code, the "Technical Code for Safety of Work at Height in Building Construction" JGJ80-1991 is attached to the disturbance front and record five, which is in accordance with the consideration. Due to the earlier specification, at present, it is a section steel cantilever unloading platform, and if the design calculation is passed, the value can be larger.