Specifications for the layout of basement bridges, what is basement bridges

It is the specification of the layout of the bridge, first of all, to ensure the safety first, and then secondly, its aesthetics, and to be able to live and a series of methods.

It is precisely when the bridge is pinched, it is placed, which is stipulated by the state, so the layout specification of the basement bridge is formulated in accordance with the national standards for buildings.

Basement bridge layout specifications Basement bridges, not stubborn specifications, which should be planned according to the weight of your entire building.

If he is a bridge, then the most standardized method is to do it according to the standards assessed by the state. In this, no one can arrange it casually, and it is generally controlled by national standards.

The layout of the fourth bridge should be similar to the purchase of a normal building, and it should not be dealt with.

It is also a matter of the specification of the structural part, which can be supported by it and the three-dimensional way.

The bridge in the basement is very distinctive, and many people have passed by there to admire.

The bridge in the basement is very well arranged, the environment is very good, and many people go to **.

The specification of the basement bridge layout can be standardized according to your own thoughts and your own style.

The rest is the scope of the bridge layout, well, if you want to know its scope, and then people's ideas and design methods are not the same, if you want to know, you search for this**, you can learn from how other people get it, you can learn from it.

A basement tray is a type of support structure used for cable laying, which is usually installed in buildings or underground piping systems. Its main role is to transmit cables from one location to another and to protect the cables from the external environment.

Basement bridges are usually made of steel materials, which have high strength and corrosion resistance. Its shape is similar to that of a ladder, and it can be combined and spliced with connectors to suit different lengths and angles. At the same time, supporting facilities such as branch boxes and splice boxes can also be set up in the bridge to facilitate the management and maintenance of cables.

Compared to other laying methods, such as buried laying, the use of basement trays allows for more flexible wiring and is easier to access and maintain. Therefore, it is widely used in large buildings, computer rooms, hospitals and other places.

A basement tray is a hook system installed in the basement of a building to support and protect facilities such as cables, pipes, etc., so that they can efficiently transport data, energy, and matter. This type of tray forms a complete system by using a series of bridges, brackets, booms, and other accessories that allow various types of facilities to be seamlessly connected to the rest of the building through the basement space. They are typically made of metal or plastic and can withstand high temperatures, low temperatures, humidity, and other harsh environments.

Basement trays are extremely common in modern buildings and are widely used in commercial, residential, and industrial sectors.

The grounding wire of a cable tray is not the same thing as a jumper grounding wire. Article 1 of the Code for Acceptance of Construction Quality of Building Electrical Engineering (GB50303-2000) [hereinafter referred to as the "Acceptance Code"] stipulates the following construction quality requirements for the grounding protection of cable tray (national mandatory provisions): the metal cable tray and its bracket and the metal cable conduit introduced or drawn out must be grounded (PE) or zero (PEN) reliably, and must comply with the following provisions:

1. The total length of the metal cable tray and its bracket shall be connected to the grounding (PE) or zero (PEN) trunk in no less than 2 places;

2. The two ends of the connecting plate between the non-galvanized cable tray are connected to the copper core grounding wire, and the minimum allowable cross-sectional area of the grounding wire is not less than 4mm2;

3. The two ends of the connecting plate between the galvanized cable tray are not crossed to the grounding wire, but there are no less than 2 connecting fixing bolts with locknuts or washers at both ends of the connecting plate.

1. The bridge system should have a reliable electrical connection and grounding (only for the metal bridge).

2. When the use of the bridge system is allowed to form a grounding trunk circuit, the following requirements shall be met. The connection resistance between the ends of the bridge should not be greater than ohms, and the grounding hole should be cleared of the insulating coating. In the neutral direct grounding system of 1kV and below, the grounding of the powered equipment is connected to the neutral wire grounding in the system.

When the power supply is cut off at the place, the metal cross-sectional area in the length direction of the bridge shall not be less than the specified value.

3. When laying the grounding trunk along the full length of the bridge, each section (including non-straight section) of the bridge should be reliably connected with the grounding trunk at least one point.

4. For the vibration place, a spring coil should be installed at the connection of the grounding part.

Precautions for cable tray grounding:

Cable trays and brackets, as well as the introduction or exit of metal cable conduits, must be protected and grounded, while also meeting the following requirements:

1.Both ends of the link plates between the cable trays may not need to be grounded, but no less than 2 link fixing bolts with locknuts or washers should be required between each connecting plate.

2.The minimum allowable cross-section of the copper conductors or braided copper wires at both ends of the connecting plates between the non-galvanized cable trays shall not be less than 5mm.

3.The length of the metal cable tray and its brackets and hangers should not be less than, and it also needs to be connected to the grounding trunk.

4.When the grounding trunk is placed separately along the entire cable tray, the grounding trunk is made of flat steel. When laying indoors, the cross-section should not be less than 50mm. When laying outdoors, the cross-section should not be less than 110mm.

5.Allows the use of cable trays to form grounded relay circuits. The cable tray and its branches, hangers and connecting plates should be able to withstand ground fault currents. and meet the requirements of thermal effects.

6.In summary, in order to prevent galvanic corrosion, bare copper conductors should not be used as grounding wires on aluminum alloy cable trays.

Indoor clear height (except for rooms with flooding slope on the floor floor).

5 points of indoor clear height are measured in each room (including 1 point at 300 500mm from the four corners of the wall and column, and 1 point in the middle);

2.2 places are measured in each room of the indoor net room and net depth (including 1 place at 300 500mm from the wall and the four corners of the column), and the net distance between the columns is measured without a wall (1 place from the edge of the column).

3.Detection is carried out using a laser rangefinder. Check them all. The maximum negative deviation shall not exceed 20mm, and the extreme deviation shall not exceed 20mm (the deviation is the difference between the measured value and the estimated value; The range is the difference between the maximum and minimum values of the measured values).

The difference between the indoor net opening room and the net depth is not more than 20mm

The floor height of a dwelling is the distance between the lower floor or slab surface and the upper floor, that is, the height of the one-story house. The clear height of a dwelling is the distance between the lower floor or the upper surface of the floor slab and the lower surface of the upper slab. The relationship between the clear height and the floor height can be expressed by the formula:

Clear height = floor height - floor thickness. The indoor clear height of the rough house at the time of delivery refers to the floor height minus the thickness of the floor structural plate and then minus the thickness of the plastering of the ceiling and the thickness of the screed floor of the ground. (Code for Acceptance of Construction Quality of Concrete Structure Engineering (GB50204-2002).)

What is the standard distance between the workshop tray and the ground.

Summary. Hello.

Vertical spacing, electrical at the top of the upper layer 100 mm away from the beam.

What are the requirements for the spacing between the installation of electrical trays in the basement and the plumbing and ventilation pipes.

Hello basement electrical tray installation and plumbing and ventilation duct spacing specification requirements. Vertical spacing, electrical at the top of the upper layer 100 mm away from the beam.

The net height of the bottom of the ground beam and the bottom of the pipe shall not be less than 2 meters.

The basement belongs to the dark and damp area, this kind of cable first needs to have moisture resistance, good sealing, corrosion resistance, aging resistance performance characteristics, can be recommended to use aluminum alloy or stainless steel cable tray.

Material requirements.

1. Straight sections, bends, bridge accessories and supports, hangers of various specifications of cable trays;

2. Connecting and fastening bolts of bridge accessories.

Note: 1. The storage place should be dry, covered and well ventilated, and the erosion of corrosive substances such as acid, alkali and salt should be avoided.

2. In the storage place, it must be classified and stacked, and it should not be beaten, and appropriate soft cushions should be used between the layers to avoid high pressure, so as to prevent deformation and damage to the anti-corrosion layer, which will affect the construction and the quality of the bridge. In a corrosive environment, there should also be anti-corrosion measures, once it is found that there is deformation and damage to the anti-corrosion layer, it should be treated in time before storage.