46.02
16397 Rev A Updated 03/2021 © 2021 Victaulic Company. All rights reserved.
5.0 PERFORMANCE (CONTINUED)
Dormer Protection Criteria
The protection scheme for dormer roofs shall be in accordance with the following guidelines:
Dormers Built Entirely Over (on top) of Main Roof Sheathing – 4 Sprinklers or Less – Any Slope
• RE/DS Sprinklers allowed (CPVC allowance applies for wet systems only)
• Standard Spray Sprinklers allowed
Dormers Built Entirely Over (on top) of Main Roof Sheathing - More than 4 Sprinklers
• RE/DS Sprinklers allowed where the pitch is between 3:12 and 6:12. Protection scheme utilized shall be in
accordance with this document
• Standard Spray Sprinklers allowed for any slope
Dormers Open to Attic Space Below – 4 Sprinklers or Less – Any Slope
• RE/DS Sprinklers allowed (CPVC allowance applies for wet systems only)
• Standard Spray Sprinklers allowed.
Dormers Open to Attic Space Below - More than 4 Sprinklers
• RE/DS Sprinklers allowed where the pitch is between 3:12 and 6:12. Protection scheme utilized shall be in
accordance with this document
• Standard Spray Sprinklers allowed for any slope. (Required to calculate Attic in accordance with NFPA 13 (i.e.
2535 sq. ft. for Dry Systems)
FIGURE 15A
DORMER OPEN TO ATTIC SPACE
FIGURE 14C
2 ROW DS SPRINKLER
(HIP SHOWN AT CORNER)
FIGURE 15: DORMERS SECTION VIEW
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