What kind of scaffolding is better? The difference between inner scaffolding and outer scaffolding

The steel pipe of the scaffolding structure must be extremely smooth, and there should be no cracks, and there should be no defects such as rust, delamination, scarring, and burrs. If one of these defects occurs, it may cause damage to the steel pipe, and it is not possible to use a cross section to connect the long steel pipe. For the surface of its castings, it should be smooth and flat, and there can be no problems such as sand holes and shrinkage holes, and the sticky sand defects on it must be thoroughly removed in time to ensure that the bowl buckle scaffold scaffold can be used normally.

First of all, the width must be convenient for the construction personnel to operate, as well as the placement and transportation of materials; Secondly, the strength and rigidity of the bowl buckle scaffold should be good, the stability should be strong, and the erection steps should be as simple as possible, and it is easy to dismantle, and it can be reused. Scaffolding accessories need to be maintained from time to time in use to reduce wear and tear and prolong the service life of fasteners. It is necessary to have sufficient firmness and stability to ensure that there is no deformation, tilting and shaking during the construction under the specified load and climatic conditions.

It should have enough usable area to meet the requirements of stockpiling, transportation, operation and walking. The structure should be simple, and it should be easy to erect, dismantle and transport. Buckle scaffolding is a new type of scaffolding, its biggest advantage is that it is convenient, can be built by one person alone, very fast, and can greatly save construction time.

And its stability and load-bearing capacity are also better than those of old-fashioned scaffolding, so it is rarely welcomed on various construction sites. Compared with other scaffolding, the disc buckle scaffold has a significant advantage in that it has a double self-locking function, which does not need to be manually locked, so the safety performance is more guaranteed, and the temperature performance of the entire scaffolding system is improved. In addition, it does not need to be connected with small parts such as bolts, which makes it easier to erect and save the cost of configuring these parts, so it is more economical.

The advantages of the new scaffolding bracket (compared with the bowl buckle) are as follows: it has sufficient mechanical strength, stiffness and stability, and works safely and reliably. The node connection is frameless, has the ability to self-lock, the assembly and disassembly are flexible, simple and fast, easy for workers to master, and the work efficiency of support and dismantling is about three times higher than that of the bowl buckle type multi-functional scaffolding, which can save labor, effort and time.

During the construction process, the passage will be opened and closed at any time. The cost is low (it can speed up the construction progress and shorten the construction period), the large-space three-dimensional scaffold with the same conditions, the material consumption of the new building quick-release bracket is less than that of the bowl buckle type multi-functional scaffold, and the weight of a single rod of the same specification is also lighter than that of the bowl buckle type multi-function scaffold. The new bracket is most suitable for early dismantling of the formwork keel, which can save a lot of keel, formwork and bracket rods through early dismantling, saving about 30%.

Sturdy and durable, the plug and socket are not afraid of dropping, not easy to be cast by cement, easy to transport, easy to count. At the same time, there is no loss of scattered accessories, and the loss is lower than that of bowl buckle type multi-functional scaffolding.

The most used in China is the steel pipe fastener scaffolding, but in foreign countries, the more used is the disc buckle scaffolding, to say which is the best, it must be the new type of disc buckle scaffold is better to use, more saving materials, safety and stability are also better. To measure the design of a scaffolding system, we should first evaluate whether its mechanical structure design is reasonable and whether it can maximize the safety requirements of the application. At present, most of the different building support systems widely used are multi-member structural systems, which are composed of many single-limb rods or brackets, which are erected in different node connection ways to build a complete application system.

Different systems are designed with different joints in different ways, resulting in different overall safety from the perspective of mechanical structure, especially in support applications with large loads. Secondly, since the single-limb member or scaffold is the basic unit of the whole system, its manufacturing process level and product consistency are another key factor.

The difference between inner scaffolding and outer scaffolding is: different erection positions, different characteristics, different structural forms, and different application scopes.

1. The erection position is different.

The scaffolding is erected inside the building, and after each layer of wall is built, it is transferred to the previous floor for a new layer of masonry.

Outer scaffolding is erected on the perimeter of the building.

2. The characteristics are different.

The scaffolding is less material, but the installation and dismantling are frequent, so it is required to be light and flexible, and it is easy to install and disassemble.

The load variability of the outer scaffold is large, and the connection point with the wall has a large variation in the constraint of the scaffolding.

3. The structure is different.

There are many kinds of scaffolding structural forms, such as folding type, pillar type, and gantry type.

External scaffolding includes floor-mounted external scaffolding, hanging scaffolding, pick-up scaffolding, hanging scaffolding, etc.

4. The scope of application is different.

Inner scaffolding is mostly used for masonry and interior decoration construction of interior and exterior walls.

Exterior scaffolding is mostly used for exterior wall masonry, façade decoration and reinforced concrete engineering.

Inner scaffolding, also known as interior wall scaffolding, is a scaffolding erected along the interior wall, which can be used for interior and exterior wall masonry and interior decoration construction. The scaffolding is less material, but it is frequently dismantled. Its structural forms include folding type, door post type, bracket type and so on.

Calculate the amount of scaffolding engineering: 1The amount of scaffolding is calculated according to the floor area of the building.

Taking into account the characteristics of industrial buildings and civil buildings, the quota subheadings are calculated separately. 2.When the floor height of the building is calculated according to the floor area of each floor, and when the floor height is exceeded, each increase is calculated according to the additional subheading, and it is not calculated when it is insufficient.

The calculation formula is as follows: Scaffolding increase coefficient = (floor height 3.).If the full scaffolding should be calculated according to the calculation rules of full scaffolding, the scaffolding shall be calculated according to 50% of the construction area of the part.

4.The erection of scaffolding without construction area shall be calculated separately according to the provisions of the corresponding project.

1. Divided according to the location relationship with the building

1) External scaffolding: External scaffolding is erected from the ground along the periphery of the building, which is not only used for exterior wall masonry, but also can be used for exterior decoration construction. Its main forms are multi-pole type, frame type, bridge type, etc. The multi-pole type is the most widely used, followed by the frame type. Bridge applications are minimal.

2) Scaffolding: Scaffolding is erected inside the building, after each layer of wall is built, it is transferred to the previous floor to carry out a new layer of masonry, it can be used for the masonry and interior decoration construction of interior and exterior walls. The scaffolding is less material, but the installation and dismantling are frequent, so it is required to be light and flexible, and it is easy to install and disassemble.

Its structural types include folding, pillar and gantry.

The scaffolding step distance is generally meters, and the span distance is generally meters.

The step distance at the bottom of the scaffold should not be greater than 2 meters. The poles must be reliably connected to the building with wall pieces. In addition to the top layer of the pole joint, the joints of the rest of the layers must be connected by butt fasteners.

If the docking method is adopted, the docking fasteners should be staggered; When the lap joint method is adopted, the lap length should not be less than 1 meter, and no less than 2 rotating fasteners should be used to fix, and the distance from the edge of the end fastener cover plate to the rod end should not be less than 100 mm.

Specifications for the erection of scaffolding.

1. The erection of scaffolding should meet the relevant requirements, and sufficient and firm tie points should be set between the scaffold and the wall, and the distance of the scaffold pole should not be increased at will or no tie should be set.

2. The foundation of the scaffold should be leveled or skids and backing plates should be added to ensure that it has sufficient bearing capacity to prevent overall or partial subsidence.

3. The outside of the scaffold ramp and the feeding platform should be provided with a safety railing with a height of 1m and a foot guard with a height of 450px or a protective vertical net, and it should be raised with the increase of the construction height.

4. The laying of scaffold board should be full, paved and paved steadily, and there should be no cantilevered board.

5. In the process of erecting the scaffold, the wall rod, scissor brace and the necessary rope and sling should be set up in time to prevent the scaffold from being deformed and dumped during the erection process.

What is scaffolding is introduced as follows:

Scaffolding is a working platform erected to ensure the smooth progress of each construction process. According to the position of erection, it is divided into outer scaffolding and inner scaffolding;According to different materials, it can be divided into wood scaffolding, bamboo scaffolding, and steel pipe scaffoldingAccording to the structural form, it is divided into pole scaffolding, bridge scaffolding, portal scaffolding, hanging scaffolding, hanging scaffolding, pick scaffolding, and climbing scaffolding.

History & Trends:

In the early 80s of the last century, China successively introduced various types of scaffolding such as portal scaffolding and bowl buckle scaffolding from abroad. Gantry scaffolding has also been widely used in many domestic projects, and good results have been obtained, due to the product quality problems of portal scaffolding, this kind of scaffolding has not been widely popularized and applied.

A number of gantry scaffolding production plants have been built in China, and most of their products are processed according to foreign businessmen. Bowl buckle scaffold is the most widely used scaffold in the new type of scaffolding, but it is not widely used, and it is only used in some areas and some projects.

Since the 90s, some domestic enterprises have introduced foreign technology and developed a variety of new scaffolding, such as bolt scaffolding, crab module scaffolding, disc scaffolding, square tower scaffolding, and various types of climbing scaffolding.

By 2013, there were more than 100 professional scaffolding manufacturers in China, mainly in Wuxi, Guangzhou, Qingdao and other places. Technically speaking, China's scaffolding enterprises have the ability to process and produce various new scaffolding. However, the domestic market has not yet been formed, and the understanding of new scaffolding by construction enterprises is insufficient.

With the emergence of a large number of modern large-scale building systems in China, fastener-type steel pipe scaffolding can no longer meet the needs of building construction development, and it is imperative to vigorously develop and promote the application of new scaffolding. Practice has proved that the use of new scaffolding is not only safe and reliable in construction, fast in assembly and disassembly, but also in the amount of steel used in scaffolding can be reduced by 33%, the efficiency of assembly and dismantling can be increased by more than two times, the construction cost can be significantly reduced, and the construction site is civilized and tidy.

Scaffolding is a working platform erected to ensure the smooth progress of each construction process. Scaffolding is divided into outer scaffolding and inner scaffolding according to the position of erection; According to different materials, it can be divided into wood scaffolding, bamboo scaffolding, and steel pipe scaffoldingAccording to the structural form, it is divided into pole scaffolding, bridge scaffolding, portal scaffolding, hanging scaffolding, hanging scaffolding, pick scaffolding, and climbing scaffolding. <

Scaffolding is a working platform erected to ensure the smooth progress of each construction process. Scaffolding is divided into outer scaffolding and inner scaffolding according to the position of erection; According to different materials, it can be divided into wood scaffolding, bamboo scaffolding, and steel pipe scaffoldingAccording to the structural form, it is divided into pole scaffolding, bridge scaffolding, portal scaffolding, hanging scaffolding, hanging scaffolding, pick scaffolding, and climbing scaffolding.

1. What are the differences between scaffolding and brackets 1. When the construction site personnel of scaffolding operate in accordance with the horizontal transportation, they are erected in accordance with the horizontal transportation, mainly in a high-altitude position. 2. The bracket is mainly aimed at a support of the plate beam structure, it is not the bracket of the online shelf, there is a fixed template pouring in the process of construction, and the role of preventing the template from moving the bracket is reflected when pouring, if the bracket is not erected firmly when setting, then it is very likely that the phenomenon of grinding plate deviation will occur, and it may lead to the accident of collapse in serious cases.

The more common scaffolding includes steel pipe, wood, and bamboo scaffolding, among which steel pipe scaffolding has the advantage of large bearing capacity and a wide range of use, and can be subdivided into fastener type, door type, bowl buckle type, disc buckle type, aluminum alloy type and other types; Wooden and bamboo scaffolding, on the other hand, must be fixed with cable-stayed rods and are prone to moisture or fire, so they are used less frequently.

Different types of engineering construction use scaffolding and formwork support. Most of the bridge support frames use bowl buckle scaffolding, and there are also portal scaffolds for hail transportation. The main structure construction of the floor scaffold uses the wheel head fastener scaffolding in the majority, and the longitudinal distance of the scaffold pole is ordinary; The horizontal distance is common.

Scaffolding usage tips

The number of floor-mounted external scaffolding foundation wax shop must be flat and tamped, and a backing plate should be set along the length of the outer scaffold on the foundation, and the backing board material can be made of wooden scaffold board or channel steel, etc.; The scaffolding foundation should be drained in an organized manner, and drainage ditches should be set around it.

When the foundation of the scaffold pole is not at the same height, the longitudinal sweeping rod at the height must be extended to the low place by two spans and fixed with the pole, the height difference is not more than 1m, and the distance from the pole axis above the slope to the slope should not be less than 500mm.

Scaffolding is a necessity for construction projects, providing an operating platform for construction workers.

Scaffolding has bamboo, steel pipes, galvanized pipes, aluminum alloy pipes, etc.

Among them, galvanized pipes and aluminum alloy pipes are used for decoration, maintenance and maintenance.

Generally, the need for difficult projects is to use aluminum alloy single-tube scaffolding.

Aluminum alloy disc scaffolding is used for ultra-high maintenance or difficult cantilever and cantilever.