Solutions to various bending modes of trunking

Make a 45 "z "bend on the 400X 150 bridge, take 15cmX0.8 from the bridge side and draw points at the bottom of the bridge with equal distance, then connect the three points to form a 45 isosceles triangle (the other side uses the same method), cut off the triangle to form a 45" bend, and then draw a height of x 60. Bend 90 to draw a triangle, which is twice the size of the side to be made. For example, use 400X 150 as a cross elbow, draw a triangle at 400X2 and cut it off. If you want to make a vertical elbow, it is 150X2. Formula: For example, for an elbow with a slope of 45 degrees, "When climbing 45 degrees, the bridge height is multiplied by 0.8, three lines are divided into a bend, the groove is the climbing height multiplied by 1.4 130 degrees, the bridge height multiplied by 0.8 divided by 45 multiplied by 30, the groove is the climbing height multiplied by two horizontal 90-degree bends, the bridge width multiplied by 0.8, and the groove (inside).