What is the outer frame construction plan? There are several ways to erect the outer frame of a buil

2.The outer frame must be made of steel outer frame composed of scaffold steel pipes, scaffold fasteners, etc., and shall not be built with materials such as bamboo or steel bars. 3.

The erection of the outer frame must be carried out in accordance with the construction plan, and can only be used after the acceptance of professional and technical personnel. 4.The outer frame must be set up with a safety virtual net and safety bar to ensure the safety of construction personnel.

5.The outer frame must be regularly inspected and maintained to ensure the stability and safety of the outer frame. 6.

During construction, obvious safety signs and warning lights must be set up to ensure the safety of pedestrians and construction personnel. 7.When erecting the outer frame, it must comply with the local safety regulations and regulations, and accept the supervision of the local management department.

In short, the outer frame erection specification should be high, and the safety and stability of the outer frame must be ensured to ensure the safety and construction quality of the construction personnel.

The requirements of the outer frame erection specification are as follows:

1. In the erection of steel pipe fastener scaffolding, attention should be paid to the smooth and solid foundation, the base and backing plate should be set, and reliable drainage measures should be taken to prevent water from soaking the foundation.

2. According to the setting of the connecting wall rod and the size of the load, the open double-row scaffold pole is commonly used. The horizontal distance is general, the step distance of the masonry scaffold is general, the scaffold for decoration or masonry and decoration is generally 1 80m, and the longitudinal distance of the vertical pole is 34 50m. When it is set up in a single row, the horizontal distance of the pole and the longitudinal distance of the pole are allowed to be erected at a height of 24m.

3. The longitudinal horizontal rod should be arranged on the inner side of the vertical rod, and its length should not be less than 3 spans, and the longitudinal horizontal rod can be used butt fastener or lap joint. If the butt fastener method is adopted, the butt fasteners should be staggered; If lap connection is used, the lap length should not be less than 1m, and 3 rotating fasteners should be fixed at equal intervals.

4. A transverse horizontal rod must be set at the main node of the scaffold (that is, the buckle point where the three rods of the vertical rod, the longitudinal horizontal rod and the transverse horizontal rod are close together) and it is strictly forbidden to dismantle it. The center distance between the two right-angle fasteners at the main node should not be greater than 150mm.

In double-row scaffolding, the extension length of the transverse horizontal rod against the wall should not be greater than the times of the horizontal distance of the vertical rod, and should not be greater than 500mm. The transverse horizontal rods at the non-main nodes on the working layer should be set at equal intervals according to the needs of supporting the scaffold, and the spacing should not be greater than half of the longitudinal distance.

5. The scaffold board of the working layer should be paved and paved steadily, leaving the wall 120 150mm, and the narrow and long scaffolding, such as stamping steel scaffolding, wooden scaffolding, bamboo string scaffolding, etc., should be arranged on three transverse horizontal rods.

When the length of the scaffold board is less than 2m, two transverse horizontal rods can be used to support it, but the two ends of the scaffold board should be reliably fixed with it to prevent tipping. The wide bamboo fence scaffold board should be laid perpendicular to the longitudinal horizontal rod according to its main bamboo bar, and the butt tiling should be adopted, and the four corners should be fixed on the longitudinal horizontal rod with galvanized steel wire.

Scaffolding erection specification:

1. The scaffolding steel pipe should be made of steel pipe. It is strictly forbidden to punch holes, cracks, deformations, and slippery bolts on the steel pipe. When the bolt tightening torque reaches 65 N·m, the fastener must not be damaged. There should be a product certificate, and a sampling retest should be conducted.

2. Scaffolding includes floor-mounted scaffolding, cantilevered scaffolding, and attached scaffolding.

Gantry scaffolding, etc. It is strictly forbidden to mix and match steel and wood and steel and bamboo in scaffolding, and it is strictly forbidden to connect the frame bodies with different stress properties.

3. The safety net is hung tightly to achieve a large surface flat, taut and straight, and the horizontal lap joint part should ensure that at least one hole is overlapped, and the hole is full of ties, and there shall be no obvious gaps from a distance. The upper and lower mouth binding shall not cover the big crossbar, and the uniform buckle shall be on the inside of the large crossbar, and the upper and lower steps shall be tied tightly, and the net buckle shall not be missed.

All outer frame corners should be added up and down through the length of the inner pole, safety net binding from the inner and outer poles through the pass, keep the big angle square, straight. When encountering a large gap at the junction of the upper and lower cantilever sections, a safety net should be hung, and the safety net should be hung neatly, and the construction shall not be hung at will. It is forbidden to use dense safety nets whose flame retardant performance does not meet the specified requirements on site.

The dense mesh safety net must meet the requirements of 2000 mesh 100cm2. The size is , and the weight of a single net should not be less than 3kg.

4. Vertical pole: the spacing is unified, the vertical pole is vertical and no bending, and the length of the handrail railing stretching out of the uppermost frame body should be basically the same (the outer pole of the flat roof scaffold should be higher than the cornice.

The outer pole of the scaffold on the sloping roof should be higher than the cornice epithelium, and the corner part of the scaffold forms a tic-tac-toe structure. The vertical rod of the upper and lower cantilever sections should form a straight line on the façade, and the support body of the upper and lower cantilever sections should be kept on the same façade for lateral observation, and the phenomenon of dislocation should not occur. The height of the top of the upright rod of each cantilever section shall not exceed the cantilever section steel of the previous step.

1. Outer scaffolding.

External scaffolding refers to the scaffolding erected on the periphery of a building. Exterior scaffolding is widely used, and all kinds of floor-mounted external scaffolding, hanging scaffolding, pick-up scaffolding, hanging scaffolding, etc., are generally erected on the periphery of buildings. Exterior scaffolding is mostly used for exterior wall masonry, façade decoration and reinforced concrete engineering.

2. Climbing frame. The climbing frame, also known as the lifting frame, can be divided into the main categories such as hydraulic, electric, and manual hand-pulled according to its power. It is a new type of scaffolding system developed in recent years, which is mainly used in high-rise shear wall buildings. It can climb up or down a building.

This system completely changes the scaffolding technology: first, there is no need to turn over the shelf; Second, it eliminates the disassembly and assembly process of scaffolding (used until the completion of construction after one assembly), and is not limited by the height of the building, which greatly saves manpower and materials. And from the safety point of view, it has also made a great improvement on the traditional scaffolding.

It has a great development advantage in high-rise buildings.

According to the erection position, it is divided into outer scaffolding and inner scaffolding.

1. External scaffolding refers to the scaffolding erected on the periphery of the building. Exterior scaffolding is widely used. All kinds of floor scaffolding, hanging scaffolding, lifting scaffolding, hanging scaffolding, etc., are generally built outside the building.

Exterior scaffolding is mainly used for exterior wall masonry, façade decoration and reinforced concrete works.

2. Inner scaffolding, also known as interior wall scaffolding, is a scaffold erected along the interior wall. It is divided into many kinds, which can be used for interior and exterior wall masonry and interior decoration construction, and has the advantages of less materials, flexibility and lightness.

Internal scaffolding is built inside the building. After each layer of wall is completed, it will be transferred to the upper level for a new layer of masonry. It can be used for interior and exterior wall masonry and interior decoration construction.

Compared with the general structure, the working conditions of scaffolding have the following characteristics:

1. The variability of the load is large;

2. The fastener connection node is semi-rigid, and the rigidity of the node is related to the quality of the fastener and the installation quality, and there is a large variation in the performance of the node;

3. There are initial defects in the scaffold structure and components, such as the initial bending and corrosion of the rods, the erection size error, and the load eccentricity are all large;

4. The connection point with the wall has a large variation in the constraints of the scaffolding. The research on the above problems lacks systematic accumulation and statistical data, and does not have the conditions for independent probability analysis, so the adjustment factor of the structural resistance multiplied by less than 1 is determined by calibrating the safety factor used in the past.

1) Single-row scaffolding A scaffold with only one row of upright poles, and the other end of its transverse flat rod rests on the wall structure.

2) Double-row scaffolding Scaffolding with two rows of upright poles.

3) Multi-row scaffolding Scaffolding with more than 3 rows of poles.

4) Full scaffolding Scaffolding with more than 3 rows of poles in each direction according to the scope of construction work.

5) Full height scaffolding is a scaffold set according to the maximum height of the wall or construction work and the full height from the ground.

6) Intersection (periphery) scaffolding Scaffolding that is set up along the perimeter of the building or operation area and connected with each other.

7) Special scaffolding Scaffolding with special plane and space shape, such as chimneys, water towers, cooling towers and other special forms of construction scaffolding with a circular plane, an annular shape, a "square outside and an inner circle" shape, a polygon and a special form of expansion and contraction.

In engineering construction, the safety of scaffolding construction outside the project plays a vital role in engineering construction. The safety of the builder and the expected safety of the project are determined by the stability of the outer scaffolding. Therefore, the construction of external scaffolding has an extremely significant impact on the quality of engineering construction.

Therefore, the outer scaffold should be effectively erected with the speed of the construction progress, and the height of its erection should not exceed a certain range, in the construction process, after each step of the outer scaffolding, timely correction should be carried out to ensure that the longitudinal distance between the outer scaffolding, the horizontal distance and the verticality between the vertical rods are just right, and then the base and the backing plate are placed, and the length and thickness of the backing plate should be within the specified range. In addition, channel steel can also be used as a tool for erection during the construction process.

In the construction of construction projects, the erection of the outer scaffold is an extremely important part of the whole engineering construction link, and only the erection of the external scaffold conforms to the standards of the engineering construction, in order to effectively ensure the smooth progress of the project in the construction and construction, and it is possible to ensure the safety of personnel. Therefore, the erection of scaffolding should be effectively erected with the progress of construction, and the height of erection should not exceed a certain range, the length and thickness of the backing plate should be within the specified range, and channel steel can also be used as an erection tool. In addition, the erection of wall pieces, scissor braces, transverse supports, etc. is also important for the ten brigades.

The erection of the connecting wall should be evenly distributed, in the form of flower row and side by side, and the connecting wall pieces should be set close to the main node, but there can be no deviation from the main node. After the wall piece frame is too high, scissor braces should be set from top to bottom every 6 vertical rods, and the scissor braces and the ground should be kept at a certain angle.

Before and after the construction and construction of the project, the construction and dismantling of the external scaffolding also plays an important role in the whole process, which determines whether a project can be completed perfectly. Therefore, there are also relevant regulations for the installation of scaffolding in engineering construction.

The construction of external scaffolding in construction projects is a complex and arduous work, and if you want to do a good job in this work, you must consider it from all aspects, and do a good job in scaffold laying and bracing, scaffolding pole docking, external scaffolding erection and dismantling work, only in this way can we ensure the safety of the entire external scaffolding construction and erection, and improve the quality of construction.