Professional Cable Tray Manufacturer

Shandong Hongfeng Electric Group Co., Ltd.

The products can be widely used in construction, energy, power, plant.

Bridge composition, trough tray ladder bridge structure standard

Release time:

2023-12-06

The structural types of bridge include trough type, tray type, ladder type, net format and so on.

The structural types of bridge include trough type, tray type, ladder type, net format and so on.
The main structure of the trough bridge is composed of a non-hole tray and a non-hole cover plate, and the main structure of the tray type bridge is composed of a hole tray and a hole cover plate.
The main structure of ladder bridge is composed of side plate and rung.
The following is the relevant knowledge for your reference.
1. When laying supports and hangers, trough cable bridges should be straightened by hanging wires or springs, and leveled by horizontal rulers to ensure that they can be horizontal and vertical after installation.
When round steel such as screw rod is used in the laying of trough cable tray, the diameter of profile should not be less than = 10mm, and the length of screw should not be too long, otherwise it will easily cause sloshing and affect the stability of trough cable tray laying.
2. When the tray type cable tray is laid in parallel with the general process pipe, the laying interval is at least 400mm. When it is crossed with the process pipe, the minimum installation distance is 300mm, the parallel distance between the tray type cable tray and the corrosion gas pipeline is at least 500mm, and the minimum cross spacing is 500mm.
The customer chooses which material to use according to the need of bearing capacity.
Generally, flat steel outer bracket is selected for tray type cable tray width below 400mm, and angle steel outer bracket is selected for tray type cable tray width above 400mm.
3. Ladder type cable tray vertical bend includes vertical convex bend (also known as upper vertical bend), vertical concave bend (also known as lower vertical bend), upper vertical tee, lower vertical tee, upper vertical tee, lower vertical tee, lower left vertical tee, lower right corner vertical tee, vertical tee,
The dimensional deviation of the width and height of the upper vertical four-way equal ladder cable tray should be within the specified range of Class V in GB/T 1804-2000.
It should be noted that the width of the ladder cable tray cover plate should be positive deviation, and the width of the slot body or ladder frame should be negative deviation.
4. According to the structure type, cable tray can be divided into slot type, tray type, ladder type, net format, assembly type and so on.
Among them, the trough type is the non-hole tray, which is airtight and has no ventilation hole.
Pallet type belongs to perforated pallet.
According to the structural type, the bridge can be divided into trough bridge, tray bridge, ladder bridge, grid bridge and so on.
The sealing and heat dissipation properties of different structural types of bridges are different.
5. Bridge frame standard 2000 Bridge frame standard stipulates that the manufacture, engineering design and construction of bridge frames shall not only implement this national standard, but also comply with the provisions of other existing national standards.
2000 in the standard of bridge tray, the name of the structural feature of tray type bridge is perforated tray, code name is P.
The name of the structural feature of the ladder bridge in the 2000 bridge frame standard is the ladder frame and the code is T.

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Relationship between national standard, specification and thickness of stainless steel cable tray

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Relationship between national standard, specification and thickness of stainless steel cable tray

The latest national standard for cable trays, safety loads for different heights