Ladder frame
A component of a trapezoidal cable tray that directly supports cables, consisting of two longitudinal sides and several horizontal bars
Direct connection
A rigid linear component used to directly support cables that cannot change direction or geometric dimensions
Bend
A rigid non-linear component that can change direction and is used to directly support cables
Horizontal bending
Components that change the direction of the bridge in the same horizontal plane are divided into four types: 30 degrees, 45 degrees, 60 degrees, and 90 degrees
Horizontal tee
Components that connect bridge frames in three directions at intervals of 90 degrees on the same horizontal plane are divided into two types: equal width and variable width
Static load
The type, number, outer diameter weight, and unit length of cables laid in cable trays are listed and counted according to different routes of cable laying
Dynamic load
The weight of construction and maintenance personnel during the installation and maintenance of cable trays
For lightweight cable trays, dynamic loads are generally not considered, which means that people are not allowed to stand on the tray. If people need to be considered, the span should be appropriately reduced. The additional load only refers to the load formed by ice, snow, wind, and electromagnetic force outdoors, which is related to the natural meteorological conditions of the installation site and the properties of the charged body. It should be calculated according to various conditions in the design.
Ladder frame
A component of a trapezoidal cable tray that directly supports cables, consisting of two longitudinal sides and several horizontal bars
Direct connection
A rigid linear component used to directly support cables that cannot change direction or geometric dimensions
Bend
A rigid non-linear component that can change direction and is used to directly support cables
Horizontal bending
Components that change the direction of the bridge in the same horizontal plane are divided into four types: 30 degrees, 45 degrees, 60 degrees, and 90 degrees
Horizontal tee
Components that connect bridge frames in three directions at intervals of 90 degrees on the same horizontal plane are divided into two types: equal width and variable width
Static load
The type, number, outer diameter weight, and unit length of cables laid in cable trays are listed and counted according to different routes of cable laying
Dynamic load
The weight of construction and maintenance personnel during the installation and maintenance of cable trays
For lightweight cable trays, dynamic loads are generally not considered, which means that people are not allowed to stand on the tray. If people need to be considered, the span should be appropriately reduced. The additional load only refers to the load formed by ice, snow, wind, and electromagnetic force outdoors, which is related to the natural meteorological conditions of the installation site and the properties of the charged body. It should be calculated according to various conditions in the design.
