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Architectural Services
If you have technical questions relating to fire-resistive designs, constructions, systems, and assemblies, please contact UL's Architectural Services Group for assistance.
333 Pfingsten Road
Northbrook, IL 60062-2096 USA
+1-877-UL-HELPS (phone)
+1-847-509-6292 (fax)
nbk.architectural.services@us.ul.com (e-mail)