Firestops prevent unprotected horizontal and vertical penetrations in a fire-resistance-rated wall or floor assembly from creating a route by which fire and smoke can spread that would otherwise have been fire resisting … 展开

Firestops should be maintained in accordance with the certification listing. Construction documentation sometimes includes an inventory of all firestops in a building, with drawings indicating their location and certification listings. Using this, a building owner … 展开

When the installed configuration does not comply with the appropriate certification listing, the fire-resistance rating may be lower than expected. Each opening in a fire-resistance-rated wall or floor in a building must have a certification listing. There are thousands of … 展开

• Fire blocking
• Firestop pillow
• Penetrant
• Penetration (firestop)
• Endothermic
• Annulus (firestop) 展开

Firestop materials are not rated per se. They receive a fire rating by combining materials in an arrangement specific to the item (a pipe or cable, for example) penetrating the fire-rated … 展开

Certification listings include those available from:
• Underwriters Laboratories
• Underwriters Laboratories of Canada
• Deutsches … 展开

No firestopping
Older buildings often lack firestops. A thorough inspection can identify all vertical and horizontal fire barriers and their fire ratings, and all breaches in these barriers (which can be sealed with approved methods). 展开