What are the different types of cable trays?
1) cable bridge bottom should be higher than the ground 2.2m and above, the top floor from the building should not be less than 300mm, and beams and other obstacles at the intersection, the distance should not be less than 50mm. 2) cable bridge horizontal laying, the support spacing should be 1.5 ~ 3m. Vertical laying fixed on the building structure on the distance should be less than 2m, 1.8m away from the ground part of the metal cover should be protected, or the use of metal wiring cabinet package, the door should be open. 3) Straight line cable bridge for each more than 15 ~ 30m or across the building deformation joints, should be set to expand the compensation device. 4) When the metal trunking is laid, the bracket or hanger shall be provided in the following cases: at the interval of 3m at each distance; at the distance from the outlet of the trunking at 0.5m; 5) plastic trough groove bottom fixed point spacing should be lm. 6) The cable bridge and cable trunking radius should not be less than the minimum permissible bending radius of the cable in the slot, and the minimum bending radius of the trunking can not be less than 10 times the outer diameter of the thickest cable in the slot. 7) bridge and trunking through the fire wall or floor, the cable after the completion of the deployment should take fire blocking measures.
All kinds of different specifications of the cable bridge how to calculate the amount of its bracket? ① bridge installation, "m" for the measurement unit. ② () bridge installation including straight through the bridge and elbow, etc., according to the length of meters to calculate the amount of work, do not deduct elbow, tee, Stone and other occupies the length. The main material of the bridge is "straight through the bridge, elbow, three links, Stone", respectively, according to the actual amount (including the required loss) to calculate the price of materials. The composite bridge has a wide range of mm, mm and mm for each piece of length m as a base plate. The engineering quantity is calculated as "the unit" as the unit of measurement. ④ the degree of the general by a support of a vertical count by the meter. ⑤ large span based on the length of your bridge to forget. Cable bridge type steel content selection cable bridge size calculation formula - bridge design reference
The level of the general by a support of 2 meters vertical control by 1.5 meters a support. Large span is based on the length of your bridge
The bridge is mounted in units of "10m". bridge installation, including through the bridge and elbow, etc., according to the length of meters to calculate the amount of work, do not deduct elbow, tee, Stone and other occupies the length. The main material of the bridge is "straight through the bridge, elbow, three links, Stone" according to the actual amount (including the required loss) to calculate the material price. modular bridge to each piece of length 2m as a base plate, has been integrated with a wide width of 100mm, 150mm, 200mm three specifications, the amount of engineering calculation to "100" as a unit of measurement. The
