1.Floor or Wall Assembly — Lightweight or normal weight (100-150 pcf) concrete. Min thickness of solid concrete floor or wall assembly is 4-1/2 in. Floor may also be constructed of any min 8 in. thick UL Classified hollow core Precast Concrete Units. Wall assembly may also be constructed of any UL Classified Concrete Blocks*. Max diam of opening is 6 in.See Concrete Blocks (CAZT) and Precast Concrete Units (CFTV) categories in the Fire Resistance Directory for names of manufacturers.
2.Through Penetrants — One nonmetallic penetrant installed concentrically within the firestop system. The annular space between pipe and periphery of opening shall be max 3/4 in. Pipe to be rigidly supported on both sides of the floor or wall assembly. The following types and sizes of non-metallic pipe may be used:A.Polyvinyl Chloride (PVC) Pipe — Nom 4 in. diam (or smaller) Schedule 40 solid core or cellular core PVC pipe for use in closed (process or supply) or vented (drain, waste or vent) piping systems.B.Chlorinated Polyvinyl Chloride (CPVC) Pipe — Nom 4 in. diam (or smaller) SDR 13.5 CPVC pipe for use in closed (process or supply) piping systems.
3.Firestop System — The details of the firestop system shall be as follows:A.Fill, Void or Cavity Materials* — Wrap Strip — One, two or three layers of nom 1/4 in. thick intumescent elastomeric material faced on one side with a plastic film, supplied in 1 or 2 in. wide strips (See Table 1). Strips tightly wrapped around nonmetallic pipe (film side exposed) with the edges butted. Butted ends in successive layers shall be offset. Wrap strip layers temporarily held in position using tape, wire or equivalent. RECTORSEAL — Biostop Wrap StripB.Fill, Void or Cavity Materials* — Caulk — (See Table 1) Min ¼ in. thickness of fill material applied within annulus flush with top and bottom surfaces of floor or both sides of wall. RECTORSEAL — Biostop 500+
*Bearing the UL Classification Mark
Nom Diam
of Pipe (In.)No. of stacks and
layers, and dimensions
of Wrap Strip
Annular Space
T Rating
Location of Wrap Strip
Thickness and
Location of Caulk4 in. 1 stack of 2 layers of ¼ in. 1/2 in. 2 Hr Recessed 2-1/4 in. from ¼ in. flush w/ thick by 2 in. wide or bottom surface of floor both surfaces 2 stacks of 2 layers of ¼ in. or ¼ in. from both of floor or wall thick by 1 in. wide surfaces of wall 4 in. 1 stack of 3 ¾ in. ½ Hr Recessed 3 in. from bottom ½ in. flush w/ layers of ¼ in. surface of floor or both surfaces thick by 1 in. wide ½ in. from both surfaces of wall of floor or wall 3, 2 or 1-1/2 in. 1 stack of 1 layer of ¼ in. ¼ in. 2 Hr Recessed 2-1/4 in. from bottom 1/4 in. flush w/ thick by 2 in. wide or surface of floor or both surfaces 2 stacks of 1 layer of ¼ in. ¼ in. from both of floor or wall thick by 1 in. wide surfaces of wall 3 1 stack of 2 ½ in. ½ Hr Recessed 3 in. from bottom ½ in. flush w/ layers of ¼ in. surface of floor or both surfaces thick by 1 in. wide ¼ in. from both surfaces of wall of floor or wall 2 or 1-1/2 in. 1 stack of 1 ¼ in. ½ Hr Recessed 3 in. from ½ in. flush w/ layer of ¼ in. bottom surface of floor or both surfaces thick by 1 in. wide ½ in. from both surfaces of wall of floor or wall