山东电缆桥架安装过程中，用到的弯头一般有三种：一种是水平弯，一是垂直上下弯，还有一种是“之”字弯。废话不多说，以下举例说明这些弯头制作方法及公式：

There are generally three types of elbows used in the installation process of cable trays in Shandong: horizontal bending, vertical up and down bending, and "zigzag" bending. Without further ado, the following examples illustrate the methods and formulas for making these elbows:

例:400X150的桥架做45°“之”字弯。

Example: Make a 45 ° zigzag bend on the 400X150 cable tray.

从桥架侧面取15cmX0.8在桥架底部画点将这段距离等分,然后三个点连接就成一个45°的等腰三角形(另一边用同一方法)，然后将这个三角切掉就形成一个45°弯，然后再用要做的高度X1.41为里边的顶点再画三角形，方向与前面那个相反，做出来就是一个45°之字弯。90°弯是取要做的那一面的2倍画三角，例如400X150做水平弯头,则取400X2画三角切掉就行了，如果要做垂直弯头则取150X2。

Take 15cmX0.8 from the side of the bridge and draw a point at the bottom of the bridge to divide the distance equally, then connect the three points to form a 45 ° Isosceles triangle (the same method is used for the other side), then cut the triangle to form a 45 ° bend, and then draw a triangle with the height to be done X1.41 as the top of the inside, and the direction is opposite to the front one, so that it is a 45 ° zigzag bend. A 90 ° bend involves drawing a triangle twice the size of the side to be made. For example, if 400X150 is used as a horizontal bend, 400X2 is used to draw the triangle and cut it off. If a vertical bend is to be made, 150X2 is used.

桥架总结出来的公式：

The formula summarized by the bridge:

比如45度的坡度弯头，你只要记住这句话就知道怎么做了“爬坡45度，桥架高度乘以0.8中分划三条线为一个弯，斜边是爬坡高度乘以1.4130度是桥架高度乘以0.8除以45乘以30中分划三条线为一个弯，斜边是爬坡高度乘以2水平90度弯是桥架宽度乘以0.8中分划线，斜边(内边)600以上200乘以1.41600以下100乘以1.41”。

For example, for a 45 degree slope elbow, you only need to remember this sentence to know how to do it: "Climbing a 45 degree slope, multiplying the height of the bridge by 0.8, dividing the three lines into one bend. The slope is the climbing height multiplied by 1.4130 degrees, dividing the bridge height by 0.8, dividing it by 45, and dividing it by 30. The slope is the climbing height multiplied by 2. The horizontal 90 degree bend is the bridge width multiplied by 0.8, and the slope (inner edge) is 600 above 200 times 1.41600 below 100 times 1.41.

制作方法及步骤

Production method and steps

1、制作层弯头：

1. Make the first layer of elbow:

层两个弯头的做法同“一”中弯头的做法，两个弯头间距a值由现场确定，但需满足电缆弯曲半径的要求。

The practice of the two elbows on the first layer is the same as that of the elbow in "1". The distance between the two elbows, a, is determined on site, but it must meet the requirements of the cable bending radius.

2、制作第二层弯头：

2. Make the second layer elbow:

（1）计算第二层桥架个弯头的定位尺寸e：

(1) Calculate the positioning dimension e of the first elbow of the second layer bridge:

先量出层桥架定位尺寸d值，则e=d+btg1/2α

First measure the positioning dimension d of the first layer bridge, then e=d+btg1/2 α

式中：b为层间距，角α值同“一”中角α值

In the formula: b is the interlayer spacing, and the angle α The value is the same as the middle corner of 'one' α value

（2）依照“一”的方法制作第二层弯头的第1个切口α；

(2) Make the first cut of the second layer of elbow according to the "one" method α；

（3）计算两个弯头间距c值：c=2btg1/2α+a式中：b为层间距，a为层桥架两个弯头的间距

(3) Calculate the distance c between two elbows: c=2btg1/2 α+ In formula a, b is the interlayer spacing, and a is the spacing between the two elbows of the first layer of bridge

（4）依照“一”的方法制作第二层弯头的第2个切口α；

(4) Make the second cut of the second layer of elbow according to the method of "one" α；

（5）计算补偿尺寸h：h=2btg1/2α

(5) Calculate compensation size h: h=2btg1/2 α

3、制作第三层弯头：

3. Make the third layer elbow:

制作方法同第二层弯头

The production method is the same as the second layer elbow

f=e+btg1/2αg=2btg1/2α+c

F=e+btg1/2 α G=2btg1/2 α+ C

注：多列等间距等宽桥架任意角弯头的制作方法与多层等间距等高桥架任意角弯头的制作方法相同。

Note: The production method for any angle bend of multi column equally spaced and equally wide bridge is the same as that for any angle bend of multi-layer equally spaced and equally high bridge.

三、多层“之”形弯头的作法：

3、 The practice of multi-layer "zigzag" bends:

与“二”类似，只是a、c、g值相等，所切的两个α角在桥架的两边

Similar to 'two', except that the values of a, c, and g are equal, and the two tangent α Corner on both sides of the bridge

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