2019 Strapping the Underside of Trusses - House Interior - Ceilings -

Image Text: Front view > Note: some builders use 5/8 inch drywall instead of strapping to help reduce sagging while others use both methods > A: common practice - drywall attached directly to trusses on 24 inch centers can cause drywall sagging > B: better practice - install strapping (e.g. 1x3's or 2x2's) perpendicular to trusses every 16 inches before installing drywall > Side view > trusses > sagging drywall > trusses > drywall applied to strapping