Analysis of the problems often encountered in the actual installation of cable tray

Cable trays often encounter the following questions in the actual application process, here are some answers for everyone.

1. Can the cable bridge pass through the fire door? Is there any good way?

1) It is easier to pass through the wall than through the fire door. The place where the bridge passes through the wall is sealed with fireproof mud, and the wall is repaired with fine concrete. It only needs to punch the wall, repair the wall, and block it, and the fire door needs to be cut.

2) The height of the fire doors will not exceed 3 meters, and the bridge frame passing through the fire doors will seriously affect the appearance, especially in warehouses and other workplaces, which will also affect the normal work of vehicles (forklift trucks, etc.).

3) General bridge installation location. In office buildings and other occasions, the bridge must be installed on the ceiling, and the beauty is the first. In workshops, warehouses and other occasions, there is no suspended ceiling, and the bridge will be installed closer to the ceiling.

2. Can the cable bridge be installed with suspenders?

The method of using suspenders and universal angle irons has a small bearing capacity, but it is also possible if it is sufficient to carry the load after re-checking. In short, the type of boom hanger and the distribution of lifting points must be determined according to the weight of the bridge and the weight of the cable after calculation.

3. How to correctly make cable bridges and make elbows to know the angle

The length of the bottom side of the bridge after bending (the hypotenuse at the bottom) can be the same as the width of the bridge frame, but the range should be controlled within 100-400mm. Select two points of this length, draw two vertical lines on the side of the bridge frame relative to the bottom side, and select the bending direction of the bridge frame as the cutting opening side; choose the opening side as the bottom side, and use the drawn two vertical lines as the median line of the two isosceles triangles. The formula for determining the length of the isosceles triangle base is L=2×(bridge height×sin2 2.5°), the simple algorithm is to take the 100-high bridge as an example, the length of the base of the isosceles triangle is 76.5mm, that is, 100:76.5, and the ratio is analogous to the length of the base of the isosceles triangle when the 150 and 200 high bridges are bent. As for the remanufactured elbow that limits the length of the bridge, as long as it is calculated by using the simple mathematical knowledge learned in junior high school, any length and distance can be controlled. With simple calculations using mathematical methods, elbows of various angles and lengths can be made.