When Adding 7/16 Inches to Jack Rafters Works and When it Doesn't

Why do you add 7/16 of an inch to jack rafters on a Construction Master Pro? And is this always a good shortcut?
➡️ Because the CM Pro gives you the centerline length, adding 7/16” to this amount gives you the long point lengths.
➡️ Yes and No: Adding 7/16” is a good estimate for shallow pitched regular hips and valleys using 2x stock. But as the roof gets steeper, this estimate gets less and less accurate.

[@adamsheridan9989]

Hi I'm just wondering what is the formula to find the 45degree thickness of the hip?thanks

[@CalculatedIndustries]

Hey adam, if you want the full 45 degree thickness, enter the full thickness as RUN. Then enter 45 and push PITCH. For half 45 thickness, do the same but enter only half the thickness. Trig formula would be SIN(45)= Thickness ➗➗45 degree thickness (unknown). Then solve for the unknown. Hope this helps!

[@adamsheridan9989]

Thank you