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1. Floor Assembly — The fire-rated fluted steel deck/concrete floor assembly shall be constructed of the materials and in the manner described in
the individual D700 or D900 Series Floor-Ceiling Design in the UL Fire Resistance Directory. The hourly fire rating of the floor assembly shall be
equal to or greater than the hourly fire rating of the wall assembly. The floor assembly shall include the following construction features:
A. Steel Floor and Floor Units* — Max 3 in. (76 mm) deep galv steel fluted floor units.
B. Concrete — Min 2-1/2 in. (64 mm) thick reinforced concrete, as measured from the top plane of the floor units.
C. Structural Steel Support — Steel beam or open-web steel joist as specified in the individual D700 or D900 Series Floor-Ceiling Design, used
to support steel floor units. Structural steel support oriented parallel to wall assembly at a distance specified in Item D below. When structural
steel support (Item 1C) consists of open-web steel joists, 3/8 in. (10 mm) diamond mesh expanded steel lath having a nom weight of 1.7 to 3.4
lb per sq yd (0.9 to 1.8 kg/m2) shall be installed to completely cover one side of each joist. The lath shall be secured with steel tie wire and
shall be fully covered with spray applied fire resistive material.
D. Spray-Applied Fire Resistive Material* — Structural steel supports to be sprayed with the thickness of material specified in the individual
D700 or D900 Series Design. The flutes of the steel floor units above the structural steel supports shall be filled with spray-applied fire
resistive material. The distance from the lowest elevation of the sprayed structural steel support to the face of the steel wall studs shall not
exceed 12 in. (305 mm).
ISOLATEK INTERNATIONAL — Type 300
W R GRACE & CO - CONN — Type MK-6/HY, MK-6/HY ES, MK-6s, RG
E. Spray-Applied Fire Resistive Material* — (Not Shown) - For D700 Series Floor-Ceiling Design, before or after installation of the ceiling runner
(Item 2A), steel floor units to be sprayed with the thickness of material as specified in the individual D700 Series Design. The flutes of the steel
floor units above the ceiling runner (Item 2A) shall be filled with spray-applied fire resistive material. As an alternate, the spray-applied fire
resistive material in the flutes above the ceiling runner may be applied to follow the contour of the steel floor units. Excess material shall be
removed from the flanges of the ceiling runner beyond the required thickness of spray-applied fire resistive material on the steel floor units.
ISOLATEK INTERNATIONAL — Type 300
W R GRACE & CO - CONN — Type MK-6/HY, MK-6/HY ES, MK-6s, RG
1A. Roof Assembly — (Not Shown) — As an alternate to the floor assembly (Item 1), a fire rated fluted steel deck roof assembly may be used. The
roof assembly shall be constructed of the materials and in the manner described in the individual P700 or P900 Series Roof-Ceiling Design in the
UL Fire Resistance Directory. The hourly fire rating of the roof assembly shall be equal to or greater than the hourly fire rating of the wall
assembly. The roof assembly shall include the following construction features:
A. Steel Roof Deck — Max 3 in. (76 mm) deep galv steel fluted roof deck.
B. Roof Insulation — Mineral and Fiber Board* — Min 3/4 in. (19 mm) thick boards applied in one or more layers directly over steel roof deck or
over gypsum board sheathing laid atop steel roof deck.
C. Roof Covering* — Hot-mopped or cold-application materials compatible with mineral and fiber board insulation.
D. Structural Steel Support — Steel beam or open-web steel joist as specified in the individual P700 or P900 Series Roof-Ceiling Design, used
to support steel floor units. Structural steel support oriented parallel to wall assembly at a distance specified in Item E below. When structural
steel support (Item 1C) consists of open-web steel joists, 3/8 in. (10 mm) diamond mesh expanded steel lath having a nom weight of 1.7 to 3.4
lb per sq yd (0.9 to 1.8 kg/m2) shall be installed to completely cover one side of each joist. The lath shall be secured with steel tie wire and
shall be fully covered with spray applied fire resistive material.
E. Spray-Applied Fire Resistive Material* — Structural steel supports to be sprayed with the thickness of material specified in the individual
P700 or P900 Series Design. The flutes of the steel roof deck above the structural steel supports shall be filled with spray-applied fire resistive
material. The distance from the lowest elevation of the sprayed structural steel support to the face of the steel wall studs shall not exceed 12
in. (305 mm).
ISOLATEK INTERNATIONAL — Type 300
W R GRACE & CO - CONN — Type MK-6/HY, MK-6/HY ES, MK-6s, RG
System No. HW-D-0639
HWD 0639
Reproduced by HILTI, Inc. Courtesy of
Underwriters Laboratories, Inc.
April 22, 2011
Assembly Ratings — 1 and 2 Hr (See Item 2)
Nominal Joint Width — 1-1/2 In.
Class II Movement Capabilities — 50% Compression or Extension
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Classified by
Underwriters Laboratories, Inc.
to UL 2079 and CAN/ULC-S115
US