(1) When the trough type large span cable tray is entered into the building from the outside, the slope of the bridge shall not be less than 1/100.
(2) When the cable tray is crossed with the electrical equipment, the clearance between them is not less than 0.5m.
(3) When the two sets of cable trays are laid in parallel at the same height, the clearance between them is not less than 0.6m.
(4) Draw the route of the bridge on the parallel diagram, indicate the coordinates or positioning size and elevation of the starting point, the end point, the turning point, the branch point and the lifting point of the bridge. If the side view of the bridge laying axis can be drawn, the material statistics Will be more precise.
Straight line segment: Indicate the full length, number of decks, elevation, model and specifications. Turning points and branch points: Indicate the model and specifications of the turning boards used. Lifting section: indicate the elevation change, or it can be represented by a local large sample or sectional view.
(5) The support points of the bridge, such as the column, the arm or the non-standard branch, the spacing of the frame, the installation method, the model specification, and the elevation, may be agreed to be listed on the plane, or may be marked with different sections and single lines. Figure or large sample representation.
(6) The position of the cable lead-down point and the way of guiding it down. Generally speaking, a large number of cables can be led down by a vertical bent plate and a vertical lead frame, and a small number of cables can be led down by a guide plate or a lead pipe, and the way of guiding can be indicated.
(7) The cable tray should be more than 2.2 meters above the ground. The top of the bridge should not be less than 0.3 meters from the ceiling or other obstacles. The width of the bridge should not be less than 0.1 meters. The filling rate of the cross section in the bridge should not exceed 50%.
(8) When the cable in the cable tray is laid vertically, it should be fixed on the bracket of the bridge at the upper end of the cable and 1.5 meters apart. When laying horizontally, the first, the tail, the turn and the interval of the cable are 3~5. Fix at the rice.
(9) When set in the ceiling, the opening surface of the tank cover shall maintain a vertical clearance of 80 mm, and the utilization of the section of the trough shall not exceed 50%.
(10) The cable placed in the trunking can be not tied, the cable in the slot should be straight, the cable in the slot should be straight, try not to cross, the cable should not overflow the slot, in the cable entry and exit slot, The corner should be tied and fixed. The vertical cable routing cable should be fixed to the cable bracket at intervals of 1.5 meters.
(11) When laying lines in horizontal and vertical bridges and vertical trunking, the cables should be bundled. 4 pairs of line cables with 24 bundles, 25 pairs or more of mainline cables, optical cables and other signal cables should be bundled according to the type of cable, cable diameter, and number of cable cores. The lashing distance should not be greater than 1.5 meters, the buckle spacing should be even and the tightness should be moderate.
(12) When the bridge is laid horizontally, the support spacing is generally 1.5-3m, and the spacing fixed on the building structure during vertical laying should be less than 2m.
Aluminum Cable Trays, Fiberglass Cable Trays, Steel Cable Trays
