Error Code 769 - ROOF: geometrical conditions not maintained... message appears


Question:

When analyzing a model in AutoPIPE Vessel the following Error number was reported. 

769    ROOF: geometrical conditions not maintained.

Why and how to avoid it?

Answer: 

Start by opening the output report on this model and go to the "Self-Supporting Roof" section. 

Look for and address anything in red text. 

Example: 

find in report:

D = Nominal Diameter = 9.9792 ft 

rr = roof radius = 6.25 ft

0.8D = 7.9 ft.

1.2D =  11.9 ft. 

Go back to AutoPIPE Vessel and edit the Roof element.