All kinds of elbow fittings of cable tray are generally ordered by the manufacturer. The defects made on site are: first, they are not beautiful, second, they are not used (especially spraying and hot-dip galvanizing), and third, they are time-consuming. In particular, some project supervisors are not allowed to process on site. Therefore, users usually make a list in advance according to the construction drawings, and then directly install them after being ordered by the manufacturer.
In the process of cable tray installation, there are generally three kinds of elbows: one is horizontal bending, one is straight up and down bending, and the other is "zigzag" bending. The following examples illustrate the manufacturing methods and formulas of these elbows: example: 400 × A 45 ° "zigzag" bend shall be made for 150 bridge, and 15cm shall be taken from the side of the bridge × 0.8 at the bridge
Then the three points join to form a 45 ° isosceles triangle (the other side uses the same method), then cut off the triangle to form a 45 ° bend, and then use the height to be done × 1.41 draw a triangle for the inner pole. The direction is opposite to the previous one. It is a 45 ° zigzag. The 90 ° bend is to take twice the side to be made and draw a triangle.
For example, for a 45 degree slope elbow, you only need to remember this sentence to know how to do "climbing 45 degrees, the bridge height multiplied by 0.8 bisects three lines as a bend, the slope is the climbing height multiplied by 1.41, and 30 degrees is the bridge height multiplied by 0.8 divided by 45 times 30 bisects three lines as a bend.