Table Drafts 6

9.1.3.3. Panel Seams

1. Panel seam heights, which must accommodate the increased potential for water ingress as roof slope diminishes, shall conform to Table 9.1.3.3.-A.

Table 9.1.3.3.-A Minimum Requirements for Seam Types and Heights Forming Part of Article 9.1.3.3.

Conditions (see also Part 2 and Article 9.1.3.1.)	Seam Height Minimums	Permissible Seam Types
> 1:3 (4" in 12")	25.4 mm (1")	All
≥ 1:4 (3" in 12")	38.1 mm ( 1-1/2”)	Mechanical Lock, Snap Lock, Snap Cap
1:6 (2" in 12") to ≤ 1:3 (4" in 12")	38.1 mm ( 1-1/2”)	Mechanical Lock only (single or double)
Less than 1:6 (2” in 12”) (reviewed by RGC prior to tender)	50.8 mm (2”) + butyl sealant in seam	Mechanical Lock only (single or double)
	50.8 mm (2”)	Mechanical Lock only (double)
Power-curved panels (reviewed by RGC prior to tender)	38.1 mm (1-1/2”) + butyl sealant in seam	Mechanical Lock only (single or double)
Locations with High Snow Loads (defined in Article 1.1.3.3.)	50.8 mm (2”) + butyl sealant in seam	Mechanical Lock only (double)