Fire Damper 1 Hour Floors

A firestop system consists of three components.

Fire damper 1 hour floors. Clearance requirements for damper sleeves within a wall opening are based on inch per foot 10 mm per meter of width. A 36 x 20 fire damper sleeve will have an opening of. Fire smoke dampers are typically rated for 1 1 2 or 3 hours fire resistance. Model g curtain fire dampers are offset in a sleeve to fit within the wall floor plane behind the customer s supplied grille.

Wall is 1 hr or less building is fire sprinklered. General fire and smoke damper requirements fire damper required smoke damper required typically ducts shall not penetrate fire walls but if allowed then damper is required no requirements stated in section yes unless penetration meets astm e119 or ul 263 or meets all of the following. 1 8 10 expansion joint per linear foot ii. Ibc chapter 7 and nfpa90a chapter 5.

Fire damper sleeve clearance within wall floor opening i. Fire damper sleeve clearance within wall floor opening a. 2 the penetrating items. That is why a fire damper rated for 1 5 hours can be used in a fire barrier rated for up to 2 hours and a fire damper rated for 3 hours can be used in a fire barrier rated up to four hours.

Minimum inch per linear foot 10mm per linear meter of damper both dimensions. Listed clearance requirements are 1 8 per linear foot unless stated otherwise. 1 5 and 3 hour fire ratings. Sleeve is not required to be centered but can rest on the bottom of the opening.

Openings which are made in floors and walls to accommodate through penetrating items such as ducts metal and plastic pipes electrical conduit cables cable trays etc. The hour ratings for fire dampers must be 75 of the hour rating for the wall floor or partition. Out of wall or floor fire damper 1 1 2 hour ul555 rated for use in dynamic and static systems spec dibdow 909 replaces d ibdow 706 all stated specifications are subject to change without notice or obligation. Fire dampers are ul555 tested and labeled devices installed in ducts and air transfer openings or air distribution systems designed to close upon the detection of heat.

If the wall or floor has a rating of 3 hours or more a 3 hour rated damper is required for sufficient protection. The damper sleeve assembly is installed with angle one side fast to allow the use of all types of grilles. 1 a fire resistive assembly or fire barrier wall floor etc.