What is the developed length for an elbow bend in 5" conduit if the centerline radius is 20?

To calculate the developed length for an elbow in conduit, you typically use the formula that takes into account the centerline radius and the size of the conduit. The developed length is essentially the length of the conduit that effectively follows the path of the bend.

For a standard 90-degree bend, the developed length can be approximated by the formula:

[ \text{Developed Length} = \text{Centerline Radius} \times \text{Angle in Radians} ]

In this case, the centerline radius given is 20 inches. Since we're calculating for a 90-degree bend, we need to convert that degree measurement into radians. The conversion from degrees to radians is done by multiplying by (\frac{\pi}{180}):

[ 90^\circ = \frac{\pi}{2} \text{ radians} ]

Substituting this into our developed length formula gives:

[

\text{Developed Length} = 20 , \text{inches} \times \frac{\pi}{2}

]

To get a numerical value using (\pi) (approximately 3.14):

[

\text{Developed Length} = 20 , \text{in