Expert: Stephen Major (Owner--Major Design Group) - 5/9/2007

Question
I acquired some used trusses from a builder who was deconstructing a building the same size as the garage that I am constructing. My local code enforcement officer says I need a certificate to show the trusses are compliant with a 70 lb. snow load.  How do I acquire the proper certification?

Answer
Kenneth,

Contact a licensed Professional Engineer who has experience in wood structures.  You may need to call around a bit.  Most truss manufacturers have one on staff or on retainer, so that may be the best place to start.  He (she) will be able to determine the capacity based on slope, planned spacing, dimensions of members, plate configuration, and condition.  Of course, be prepared to pay a decent hourly rate for this service.

A 70# snow load is pretty serious.  But you can always decrease the truss spacing to achieve a higher design load.  For example, drop it from 24" c-c to 19.2" or 16".

Good luck and let me know if you have additional questions.

--Steve Major