The cantilevered outer frame is mainly described in terms of general requirements, materials, scissors, poles, wall-pieces, I-beams, diagonally-drawn steel wire ropes and closed maintenance.
First, basic requirements (general)
1 The height of the erection should not exceed 20m, and more than 20m must organize expert argumentation;
2 The erecting personnel must be certified to work and wear protective equipment;
3 The progress of the outer frame is faster than the structural construction progress, ensuring the protection height;
No material or garbage shall be accumulated on the body of the four bodies;
5 The exterior façade has a building and floor sign.
Second, material (emphasis)
1 The steel pipe has no deformation or crack, and the thickness and diameter meet the requirements of the specification;
2 The fastener has no cracks and sliding wire, and the torque meets the requirements of the specification;
3 Use flame-retardant dense mesh safety net.
Third, scissors support (master)
1 The width should not be less than 4 spans, and should not be less than 6m, and the inclination angle of the inclined rods to the ground should be between 45° and 60°;
2 continuously set the scissors support on the entire length and height of the outer façade;
3 The length of the lap joint shall not be less than 1 m and shall be fixed by not less than 2 rotating fasteners.
Fourth, pole (emphasis)
1 The spacing between the poles is in accordance with the specifications and program requirements;
2 Do not appear hanging poles.
Fifth, wall unit (master)
1 The rigid wall parts are used, and the number of connected wall parts meets the requirements of the specification.
Sixth, I-beam (master)
1 should not be less than 16th, the length is not less than 3m, and the ratio of the length of the pick to the fixed end is not more than 1:1.25;
2 The anchor ring should be reliably fixed with the I-beam and the seam is tight.
Seventh, diagonal cable (general)
1 The diagonally drawn steel wire rope is not less than Ø12.5, the pull ring and the lifting ring are made of round steel, and the diameter is not less than 16;
2 Before the cantilevered steel wire rope is installed on the cantilevered I-beam, the frame body on which it is placed shall not exceed two layers;
3 The position and quantity of the unloading wire rope shall not be less than the requirements of the plan and shall be installed in time.
In addition, the unloading platform is a special cantilever structure, which must have its special requirements.
First, setting requirements (emphasis)
1 The main frame beam is not less than No. 16 I-beam, and three sides are provided with airtight protection;
2 Rings, anchor rings, etc. use round steel, and the seams of the I-beam are tight;
3 The wire rope diameter meets the requirements of the plan, and the snap ring setting meets the requirements of the specification;
4 to limit the number of signs and acceptance cards;
5 may not be located on the side of the main road or marketing advertisement;
6 Do not tie the inner and outer frames.
1 Pull-back wire rope and building pull
2 Connection of reverse-drawn steel wire rope and I-beam
a. The wire rope clamp should be fastened to the working section of the wire rope, and the U-shaped bolt is fastened to the tail section of the wire rope.
b. Before the cantilevered steel wire is installed with the cable-stayed wire rope, the frame on which the steel frame is placed shall not exceed two layers.
c. It is strictly forbidden to use steel bars instead of diagonally drawn steel wire ropes.