central compression ring in rafter supported roof

[inammanj123]

Dear ALL,

In rafter supported roof, there is a compression ring present, like shown in the attachment. Can anyone help me with the calculation for this compression. Which criteria, or any reference can be used for this.

Regards,
Inam

 

[JStephen]

There are some load cases for circular rings in Roark's Formulas for Stress and Strain that might be of use.