What is scaffolding like? The difference between inner scaffolding and outer scaffolding

Scaffold refers to a construction site.

A variety of brackets erected for workers to operate and solve vertical and horizontal transportation. A general term used in the construction industry to refer to the construction site used in the exterior wall, interior decoration or high floor height where direct construction is not possible. Mainly for the construction personnel to work up and down or perimeter safety net enclosure and high-altitude installation components, etc., to put it bluntly, it is to build a shelf, scaffolding production materials usually have:

Bamboo, wood, steel pipes or synthetic materials, etc. Different types of engineering construction.

Choose scaffolding and formwork supports for different purposes. At present, most of the bridge support frames use bowl buckle scaffolding, and portal scaffolding is also used.

Target. Fastener scaffolding is used for the construction of the main structure.

The longitudinal distance of the scaffolding pole is generally; The horizontal distance is generally. Scaffolding is also used as a formwork in some projects, and it is also widely used in advertising, municipal, transportation, roads and bridges, mines and other departments. The basic requirements that scaffolding works should meet are:

Meet the requirements of use. The width of the scaffold should meet the requirements of workers' operation, material stacking and transportation.

The width of the scaffold is generally about 2 m, and the minimum shall not be less. It has sufficient strength, stiffness and stability. During construction, under various loads, the scaffolding does not deform, shake, or tilt. Standard load values for scaffolding, take the scaffolding board.

on the actual action load, the control value of which is 3kn m2 (masonry scaffolding). Stack bricks on scaffolding, and only allow three layers in a single row. The specifications and quality of the materials used in scaffolding should be strictly inspected and comply with relevant regulations; The structure of the scaffolding should comply with the regulations, the erection should be firm, there should be reliable safety protection measures and frequent inspection during use.

It is simple to build and disassemble, easy to handle, and can be used for many turnovers. Adapt measures to local conditions, take local materials, and try to save materials.

When the scaffold erection height h is 45m, along the height of the scaffolding, the horizontal frame should be set at least two steps; When the scaffolding is erected at a height h>45m. The horizontal frame should be set up at one step per step; No matter how high the scaffold is, it should be set up at one step within a span range at the corner, end and discontinuity of the scaffold, and the horizontal frame should be continuously set up within its setting level; The assembly of the upper and lower mast must be provided with a connecting rod and a lock arm, and the diameter of the connecting rod should be less than the inner diameter of the vertical rod 1 2mm. On the operating layer of the scaffolding, the buckle scaffold board matched with the gantry should be continuously paved, and the baffle should be fastened to prevent the scaffold from falling off and loosening.

Scaffolding accessories should have double protection, and should be slow and smooth when lifting; The scaffolding board should be fully covered. All kinds of hooks and hooks should be fastened with collars; Before work, the scaffold structure, winches, hooks, hooks, wire ropes, etc. should be inspected before work, and can only be used after confirming that they are correct. The order of demolition is top-down, first built and then demolished, and then built and first demolished; Generally, the protective railing is dismantled first, and then the scissor brace and the fasteners of each part of the large surface of the examination are removed, and then the platform, ramp, small crossbar, large crossbar, vertical pole and base are dismantled.

When the gantry is installed, it should be extended from one end to the other, and the erection direction should be changed layer by layer, and it should not be carried out relative to each other. After the step frame is built, the horizontality and verticality should be checked and adjusted. The scaffolding should be continuously and synchronously erected and raised along the perimeter of the building to form a closed structure around the building; If it cannot be closed, wall pieces should be added at both ends of the scaffolding.

The span of the mast should comply with the relevant regulations, and cooperate with the specifications of the crossing; The net distance between the mast pole and the wall should not be greater than 150mm; When it is greater than 150mm, safety measures should be taken for internal pick-up shelf plate or other off-mouth protection. The inner and outer sides of the mast should be provided with cross-support and should be locked with the locking pin on the mast pole; When the height of the scaffold exceeds 20m, a horizontal reinforcement rod should be arranged every 4 steps on the outside of the scaffold, and it is appropriate to set it in the horizontal layer with connecting wall pieces; The longitudinal horizontal reinforcement rod should be continuous and form a horizontal closed circle; A sealing rod should be added at the lower end of the bottom step gantry of the scaffold, and a long sweeping rod should be provided on the inner and outer sides of the gantry; The horizontal reinforcement rod should be fastened with the mast pole by fasteners.

scaffolding. Also known as interior wall scaffolding.

It 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 in the cavity hail: 1The amount of scaffolding is calculated according to the floor area of the building.

Take into account industrial buildings.

and the characteristics of civil buildings, which are calculated separately in the quota subheading. 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.).Press full house scaffolding.

The calculation rules should calculate the scaffolding of the full house, and the scaffolding in it shall be calculated according to 50% of the construction area of the part. 4.The erection of scaffolding without the 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) Outer scaffolding.

Exterior scaffolding is erected from the ground along the perimeter of the building, which is used both for exterior wall masonry and 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 assembly and disassembly are frequent, so it is required to be light and flexible, and easy to assemble and disassemble.

Its structural types include folding, pillar and gantry.

We all know that the construction of construction projects is indispensable for the support of scaffolding, which plays a pivotal role in the project; At the same time, we also know that there are many types of scaffolding, so what are the specific classifications of scaffolding? Let's give you a detailed introduction to the classification of scaffolding, let's take a look!

1. Classification by use.

If it is classified according to the purpose of scaffolding, it can be divided into three types: operation scaffolding, protective scaffolding and load-bearing support scaffolding.

Operational scaffolding can also be called operation scaffolding, including scaffolding used in structural operations and scaffolding used in decoration operations.

The main function of protective scaffolding is to ensure safety.

The load-bearing support scaffolding is mainly used for template support.

2. Classification according to erection type.

If scaffolding is classified according to the type of erection, it can be divided into single-row scaffolding, double-row scaffolding and full-house scaffolding.

3. Classified according to materials and specifications.

If scaffolding is classified according to materials and specifications, then scaffolding can be divided into wood and bamboo scaffolding, steel pipe scaffolding and portal combination scaffolding.

Wood and bamboo scaffolding refers to scaffolding made of wood or bamboo.

Steel pipe scaffolding refers to scaffolding erected with metal steel pipes as raw materials, including fastener steel pipe scaffolding and bowl buckle scaffolding. 4. Classified according to the way of supporting.

If the scaffolding is classified according to the support method, it can be divided into floor scaffolding, cantilever scaffolding, hanging scaffolding, suspension scaffolding and attached lifting scaffolding.

Floor-mounted scaffolding is a type of scaffolding that is erected on the ground, surface, roof, or other platform structure.

Cantilever scaffolding, also known as scaffolding, is to use cantilevering to support scaffolding, such as erecting on a special cantilever beam, a special cantilever triangular truss and erecting on the support structure composed of support rods.

Hanging scaffolding, also known as hanging scaffolding, is a kind of stereotyped scaffolding that is attached to the wall and hung on the wall picks and pendants in the upper and middle parts.

Hanging scaffolding, also known as hanging scaffolding, is a kind of scaffolding suspended under a cantilever beam or engineering structure.

Attached lifting scaffolding, referred to as "climbing frame", can also be called "overall lifting scaffold", which is attached to the engineering structure, relying on its own lifting equipment to achieve lifting of suspended scaffolding, wherein the scaffold of overall lifting.

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 scaffolding; According 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 scaffolding; According to the structural form, it is divided into pole scaffolding, bridge scaffolding, portal scaffolding, hanging scaffolding, hanging scaffolding, pick scaffolding, and climbing scaffolding.

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 scaffolding; According 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.

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 Shentong 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 assembly and disassembly are frequent, so it is required to be light and flexible, and easy to assemble 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 application range of wide calendar 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 leakage reinforced concrete works.