What is the specific classification of building concealment works?

Inspection and approval of concealed work refers to the inspection and acceptance of the sub-project and sub-project that will be closed by the next process during the construction of a house or structure. Includes:

Acceptance of foundation pit and foundation groove. Before the foundation reinforcement treatment (including cushioning, soil changing, tamping, consolidation treatment and piling, etc.), the soil quality and bearing capacity of the foundation pit and foundation groove after excavation and leveling are inspected and accepted.

Acceptance of foundation works. Before the foundation is built, the quality supervision agency and the design unit and the construction unit are invited to conduct inspection and acceptance on site. Inspect and accept the construction quality after the foundation reinforcement treatment.

Acceptance of foundation works. Inspect and accept the quality, structure and size deviation of the ceiling skeleton and partition wall skeleton, water supply and drainage, gas pipelines, electrical pipelines, ventilation ducts, etc. Before the foundation groove backfill, the quality, structure, and size deviation of the foundation engineering are inspected and accepted.

Acceptance of steel reinforcement and other projects. Before pouring concrete, before covering the roof protective layer, basement foundation groove backfill, and external wall board hooking, the quantity, size deviation, structural requirements, and thickness of the protective layer of the reinforcement framework, pipelines, components, embedded parts, etc. are accepted.

Acceptance of load-bearing structure engineering. Before the construction of decoration projects such as ground, wall, roof, roof, etc., the quality, structure, and size deviation of load-bearing components (including walls, columns, beams, plates, roof trusses, etc.) are inspected and accepted.

Acceptance of waterproofing works. Acceptance of the quantity, size deviation, structural requirements, and thickness of the protective layer of the reinforcement skeleton, pipelines, components, embedded parts, etc. Before covering the roof protective layer, basement foundation groove backfill, exterior wall board hooking, before pouring concrete, the quality, number of layers, practice or cavity waterproof structure of linoleum or other waterproof materials are inspected and accepted.

Acceptance of decoration and equipment installation projects. Before the construction of decoration projects such as internal and external filling walls and ceilings, the quality, structure and size deviation of the ceiling skeleton and the partition wall skeleton, water supply and drainage, gas pipelines, electrical pipelines, ventilation ducts, etc. shall be inspected and accepted.

Concealed worksAccording to the divisions:Earthwork backfilling, pile foundation, brick, concrete, rebar, etc., auxiliary projects such as formwork engineering and visible physical projects do not do concealed information.

Each household should be provided with a sub-household distribution box.

Leakage circuit breaker should be set up in the distribution box, and the leakage action current should not be more than 30mA, with overload and overvoltage protection functions, and split the line to control lighting, air conditioning, sockets, etc., respectively, and its circuit should ensure the normal use of the load.

The laying of the wire should be carried out in accordance with the provisions of the decorative design, and the short-circuit protection, overload protection, selection of the wire cross-section, and the installation of low-voltage electrical should be carried out in accordance with the current national standards and the relevant provisions of the provinces, municipalities and autonomous regions.

Basic requirements for water supply and drainage pipelines for concealed projects:

The quality of water supply and drainage pipes and fittings must meet the requirements of the standard, and the drainage pipe should be made of polyvinyl chloride.

Drainage pipes are poor in history.

Before construction, it is necessary to check whether the original pipeline is unblocked, and then carry out construction, and then check whether the pipeline is unblocked after construction. The concealed water supply pipeline should be inspected by water, and the newly installed water supply pipeline must be pressurized in accordance with the relevant regulations, and there should be no leakage, and the inspection can only enter the next process of construction.

The drainage pipeline should be temporarily sealed before construction to avoid debris entering the pipeline.

Installation of water supply pipes with an outer diameter of less than 25mm, pipes at the corners, water meters, faucets or angle valves.

and the 100mm place of the pipe terminal should be set up with a pipe clamp, and the pipe clamp must be installed firmly. The pipes are threaded.

There should be exposed threads at its connections, and it should be fixed with pipe clamps in time after installation, and there should be no loosening between the pipe and the pipe fittings or valves.

1. Sakura stove trace water supply and drainage project;

2. Electrical pipeline engineering;

3. Floor base;

4. Parapet wall base;

5. Door and window cover base;

6. Ceiling base;

7. Strong electric cables;

8. Network integrated wiring cables, that is, network cables, first-class cables, monitoring cables, elevator ridges and call lines, etc.

Concealment works are construction projects that are concealed after renovation and cannot be seen on the surface. According to the decoration process, these hidden works will be covered by the latter process, so it is difficult to check whether the materials meet the specifications and whether the construction is standardized.