What is JM Eagle's recommended curvature for its gravity sewer pipe?

JM Eagle™ does not recommend any deflection at the joint for any of our products. Uni-Bell’s recommendation is that offset at the joint OR uniformly bending the pipe is allowable; however, Uni-Bell does not recommend both on the same length of pipe. Using our 8” SDR 35 sewer pipe as an example, the pipe can be uniformly curved along the barrel of the pipe. There is a minimum radius of curvature, which for this pipe is 200 feet. Per the following calculation, this allows curving across one 20-foot length piece of 5.73°.

Length of arc = p r = (3.14) x (200 ft.) = 628 ft.
Curve per 20’ length / 180° = length of one piece / length of arc
Curve per 20’ length / 180° = 20 ft. / 628 ft.
Therefore: Curve per 20’ length = 5.73°
*Please refer to the Minimum Radii of Curvature Chart below. Click on image to enlarge