Cable trays installation process, the specifications of cable tray brackets make installation
(1) the construction sequence Measurement cable bridge → → hanger manufacture and installation installing → ground handling (2) the main method and technique measure 1) measurement
Elastic-line method identifies the cable tray installation position, and set bracket fixing position, mark. Shaft should be determined with hanging wire bridge frame positioning installation guidelines for reserved holes don't fit, adjust and do a repair. 2) scaffold fabrication and installation According to the construction design elevation of bridge specification, locate and follow the measurement size bracket, bracket for factory production. Free along the beam lifting ceiling or wall bracket mounting, lifting in the ceiling in the ceiling or wall bracket. In public places with no ceiling combined with structures taking into account architectural appearance and easy maintenance, leaning against the wall and column bracket installation or installed on roof truss bottom chord members. Mounting bracket against the wall by expansion bolts, bracket spacing of not more than 2 metres. Linear and non linear junction, building distortion seam and bend radius greater than 300mm non linear Central hanger should be added, hangers and install cable trays horizontal or vertical degree shall be guaranteed to meet the requirements. 3) Cable Tray Installation
A ... for special-shaped bridge, in situ measurements of dimensions to material suppliers, produced by the supplier according to the size, reducing on-site machining. Cable Tray, type and thickness of the material as well as the attachments met design requirements. B. cable trays installation, must be coordinated with various professional and avoid large-diameter fire hose, sprinkler pipe, hot and cold water pipes, drainage pipes and air conditioning, ventilation equipment, there are conflicts. C. tray lifting onto the site, with a bracket bolted, carefully checking the size that you want in the corner, the bridge should be consistent with the building slope, curved building walls cable trays, the arc should be consistent with the building. Between the cable trays and cable tray with connection plate connection, connection bolt with round head bolt, round head inside the cable tray. Cable bridges gap between shall meet the design requirements, ensuring that a system of integrated cable tray. D. cable bridge that spans buildings deformation joints according to corporate standards of the installation technology of steel cable tray expansion joint treatment, straight segments of steel cable tray over 30m, should be expansion and contraction compensation device. E. cable trays horizontal even vertical installation, neat appearance, distance is consistent, solid connection, standard deviation does not exceed 5mm/m within the same level, straightness deviation does not exceed 5mm/m. 4) ground handling
Galvanized galvanized plate can be used between the bridge as a jumper, one bridge. In two connecting plates at both ends of the connection bolts and galvanized spring washers, cable trays are separated by bridging the soft copper not less than 4mm2, then cable tray with a grounding wire connected to form the electrical pathways. Cable bridge and Earth as a whole should be not less than two connections. 5) multi-layer cable tray installation Hierarchical Cable Tray installation, install upper first, then install the lower, distance between the upper and lower left room and later cable laying and repair. Horizontally adjacent Cable Tray clearance of not less than 50mm, and distance between layers should be based on minimum Cable Tray width not less than 150mm, and weak-current cable distances are less than 0.5M. Electrical piping and pipe Threading construction points (1) construction process A. hidden laying construction procedures are: → prefabrication construction preparation tube simmering bending → → fixed determination box location box, box → connection → slot → ground handling; B. Ming conduit construction procedures for: preparation → prefabrication pipe bend, brackets, hangers → OK boxes, cartons and fixing brackets, hangers fixed points → → → box fixed piping and even;
Source: http://www.bescatray.com/
