The Anatomy of Floor and Roof Trusses Before Drywall: A Guide for Draw Inspectors

A critical aspect of draw inspections is assessing the installation of floor and roof trusses before drywall is applied. Here’s what you need to know.

1. Floor Trusses: Before drywall, floor trusses should be properly aligned and spaced. Look for uniformity and the correct installation angle. Remember, trusses should be parallel and equally spaced – typically 16 or 24 inches apart, depending on the design. Ensure they are secured with appropriate hardware and not just nailed in place.

2. Roof Trusses: These should form a symmetrical A-frame or other specified shapes, depending on the design. Check for the bracing – both temporary for installation and permanent for structural integrity. The connections at the joints are crucial; they should be tight and secure with metal fasteners or plates.

Inconsistent spacing of roof or floor trusses can lead to uneven floor levels, a costly and time-consuming error to correct in later phases of construction.

Keep an eye out for any signs of damage or alterations to the trusses. Truss repairs such as sistering isn’t necessarily a problem, but be aware of it and if a GC is available, ensure the repair was signed off on by a licensed structural engineer.

If you see trusses that have been altered or modified to accommodate infrastructure elements like HVAC or plumbing, this is generally not standard practice and annotating the modification is encouraged.

We are agents of the lender and it’s our responsibility to treat their capital as our own.

Careful observation on these elements ensures the lender’s confidence in the project’s progress and structural integrity.