Leakage Ratings Through Walls, Dampers, Doors, Firestops and Joints

2. Leakage Ratings Through Walls, Dampers, Doors, Firestops and Joints Richard N. Walke Underwriters Laboratories Inc.

3. Topics for Discussion • Leakage Ratings for Walls, Dampers, Doors, Firestops and Joint Systems • Recent NFPA Code Proposals Relating to Smoke Leakage

4. Leakage Ratings

5. HVAC SmokeControl Methods Engineered Systems Static or Passive Systems

6. Walls – UL 263 • Air Leakage Assumed to be Smoke Tight • Standard does not Include Leakage Ratings

7. Dampers – UL 555S • Air Leakage Through Interior of Damper • Class I, II and III Performance Levels at Elevated Temperatures • Codes focus on Class II Performance at 250 F

8. Doors – UL 1784 • Leakage Determined at 0.1, 0.2 and 0.3 in. WC (25, 50 and 75 Pa) • Tested at Ambient and 400 F • Results Published in cfm per sq ft of Door Opening

9. Firestops – UL 1479 • Leakage Determined at 0.3 in. WC (75 Pa) • Tested at Ambient and 400 F • Results Published in cfm per sq ft of Opening

10. Joints – UL 2079 • Leakage Determined at 0.3 in. WC (75 Pa) • Tested at Ambient and 400 F • Results Published in cfm per lin ft of Opening

11. NFPA Code Changes

12. Proposed Leakage Ratings • Requirements Covers Smoke Barriers Only • Cumulative Leakage Limited to 0.75 cfm per sq ft of Wall for all Dampers, Doors, Through-Penetration Firestops and Joints

13. Contact InformationNBK Architectural ServicesPhone: (847) 272 – 8800, Ext. 40057Fax: (847) 574 – 4017Email: NBK.Architectural.Services@US.UL.com

14. Contact InformationRich WalkePhone: (847) 664 – 3084Fax: (847) 313 – 3084Email: Richard.N.Walke@US.UL.com