CommScope ConQuest Conduit Construction - Manual (Page 70)

Calculated Sidewall Pressure
This formula is used to calculate the sidewall pressure in bends. The longer the bend is the lower the sidewall pressure
will be, this will also be true for smaller angles of bend.
Calculating A Complete Run
An example provides a clear illustration of how to calculate a complete run and understand the effects of bends on
pulling tensions and sidewall pressure. Calculations have been performed in both directions. In the first calculation,
the run has the reel setup at point ‘A’ with the cable being pulled from point ‘H’. The second calculation is the opposite
with the reel setup at point ‘H’ and the cable being pulled from point ‘A’. The cable used is QR715.
P = Tb / l
where:
P = Sidewall pressure
Tb = Pulling tension at end of bend
in pounds
l = length of bend radius
Example: QR 715
Tb = 79
l = 10
P = 79 / 10
P = 7.9
8.13 Appendix
Calculated Sidewall Pressure