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.� FIRE RESISTANCE DIRECTOXRH) FIRSISTANCE DIRECTORY(BXRH) 343
FIRE RESISTANCE RATINGS - ANSI/UL263 (BXUV)—Continued FIRE RESISTANCE RATINGS - ANSI/UL263 (BXUV)—Continued
Armstrong World Industries,Inc.—Types 5/8 in. P(S)24 x 24 or mixture to 595 Its. of sand. Compressive strength 900 psi minimum.
48 in., or 5/8 in. PC (S) 24 x 48 in. Thickness to be 1 in, minimum. Building paper(Item 2) optional.
9, Hold-Down Clips—(Not Shown)-1/2 in. wide, 0.021 in. thick spring Floor Crete Systems, Inc.—Type II.
steel. Two clips placed over cross tees 12 in. from each main tee. System No. 2
*Bearing the UL Classification Marking Floor Topping Mixture*—Foam concentrate mixed 40:1 by volume with
water and expanded at 100 psi through a foam nozzle. Mix at rate of 1.4
cu it of preformed foam to 94 Ws Type I Portland Cement and 300 lbs of
sand with approximately 5.5 gal of water. Cast density of Floor Topping
Design No. L209 j
Mixture 100(+or-)5 pcf.Min compressive strength 3000 psi.Thickness
Unrestrained Assembly Rating-1 Hr. 1-1/2 in.
Finish Rating-14 Min. Elastizell Corp. of America—Type FF. !:
System No. 3 -
Floor Topping Mixture*—Foam concentrate mixed 40:1 by volume with
1 2 3 water and expanded at 100 psi through a foam nozzle. Mix at rate of 1.4 cu it
of preformed foam to 94 Ibis Type I Portland Cement,62.5 lb of Pea Gravel and
312.5 lbs of sand, with approximately 5.5 gat of water. Cast density of Floor
-� - Topping Mixture 100 (+ or -) 5 pcf. Min compressive strength 1000 psi.
Thickness 1 in.
Lite-Crete, Inc.—Type I.
System No. 4
g'MIN. 4 55 14 Floor Topping mixture*-6.8 gal of water to 80 Ibs of floor topping mixture
to 1.9 cu ft of sand. Min compressive strength 1000 psi, thickness 1 in.
Hacker Industries, Inc.—Firm-fill, Firm-fill 2010, Firm-Fill. High
Strength, Gyp-Span Radiant.
- 3' MIN. 9 Floor Mat Materials*—(Optional)—Floor mat material nom 1/4 in.thick
adhered to subfloor with Hacker Floor Primer.Primer to be applied to the
$ 2-1/2' t�, surface of the mat prior to the placement of a min 1-1/2 in. of
10 floor-topping mixture.
Hacker Industries, Inc.—Type Sound-Mat.
2. Building Paper—Commercial rosin-sized, 0.010 in. thick.
3. Subftoorfng-1 by 6 in.T&G,fastened diagonally to joists,or 15/32-in.
plywood, min grade "C-O" Exposure 1 or "C-D" with exterior glue, and
conforming with PS 1-83. Face grain of plywood to be perpendicular to
7 $ 10 13 joists with joints staggered.
4. Cross Bridging-1 by 3 in.
5. Wood Joists-2 by SO in., spaced 16 in. OC, firestopped.
6. Fixture Protection—Acoustical Material*-1/2 in. thick, cut into
pieces to form a 5 sided enclosure, trapezoidal in cross-section, approx
1 2 $ 112 in.longer and wider than the fixture with sufficient depth of provide
at least 2-112 in. clearance between the top of the fixture and the
enclosure.The pieces are held together by 6d nails spaced 12 in.OC min.
(S)-Surface Perforations.
Armstrong World Industries, Inc.—Type P (S).
r v a y 7. Flexible Steel Conduit—(Bearing the UL Listing Mark).
8. Fixtures, Recessed Light—(Bearing the UL Listing Mark). Fluorescent
lamp type,steel housing,2 by 4 it size.Fixtures spaced so their area does
not exceed 16 sq it per 100 sq ft of ceiling area. Wired in conformance
with the National Electrical Code . Fixtures and ballasts must be
A considered for these ambient temperature conditions before installation.
L 9. Hanger main Gann steel dj cen min mars Spaced not more than s in.
OC along main runners, adjacent to intersections of main runners and
crass tees. Additional hanger wires required at all four corners of light !i
fixtures, at midspan of cross tees adjacent to light fixtures, air duct
outlets and at main runner splice locations. Hanger wire supported from
8d common nails located 1-1/2 in. below subflooring.
- - — - 10. Steel Framing Members*—Main runner tees nom 12 R Long,spaced 4 it
11 OC.Cross tees nom 4 ft long,installed perpendicular to main runners and
spaced 2 it OC.
Armstrong World Industries, Inc.—Types AFG, AFG-A.
CGC Interiors—Types DXL, DXLA, ZXLA.
Chicago Metallic Corp.—Types 250,260,1250,1260,1850,1860.
National Rolling Mills Inc.—Types FG, FST-6000, -6000A, -8000,
-8000A, MLFR-6000.Type GLBP(consisting of main runners,4 ft 10
cross tees and steel straps)for use with 24 by 48 by 5/8 or 3/4
in. thick Type P Lay-in panels.
USG Interiors, Inc.—Types DXL, DXLA, ZXLA.
rT - 10A. Steel Framing Members--For use with metric size panels described
under Item 13. Main runners nom 3600 mm Long, spaced 1200 mm OC.
Cross tees nom 1200 mm Long, installed perpendicular to main runners
and spaced 600 mm OC for 600 by 1200 mm lay-in panels
CGC Interiors—Types DXL, DXLA.
.v. 1 $ USG Interiors, Inc.—Types DXL, DXLA.
11. Air Duct—Formed of 20 MSG galy steel, with duct openings not
exceeding 113 sq in. per each 100 sq it of ceiling area.Area of ind duct
,,. 1. Finish Flooring-1 by 4 in.,T&G; Laid perpendicular to joists,or 19/32 opening not to exceed 113 sq in. Max dimension of opening 12 in.
,:- in. plywood, min grade"Undedayment"or"Sturd-I-Flooe'with T&G long Supported from hanger straps made of double thickness 24 MSG galy steel
edges, and conforming with PS 1-83. Face rain of plywood to be
9 g g PY and spaced t in. OC.
perpendicular to joists with joints staggered. 12. Air-Duct Protection Board—Made of min 24 by 24 by 1/2 or 1 in. piece
1A. Alternate Finish Flooring—The alternate finish flooring may consist of of Acoustical Material placed on top of duct over opening,extending the
the following: entire width of the dud and beyond the edges of the opening not less
System No. 1 than 5 in.
a; Floor Topping Mixture*-10-13 gal.of water to 170 lbs.of floor topping Armstrong World Industries, Inc.-1/2 in. min thickness.
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344 FIRE RESISTANCE DIRECTORY(BXRH) FIRE RESISTANCE DIRECTORY(BXRH)
FIRE RESISTANCE RATINGS - ANSI/UL263 (BXUV)-Continued FIRE RESISTANCE RATINGS - ANSI/UL263 (BXUV)-Continued
CertainTeed Corp.-1 in. min thickness. and secured to wood joists with one 8d common nail approx 7-1/2 in.
13. Acoustical Material--24 by 48 lay-in panels. Border pieces supported above the bottom of the joists. Duct hangers are to be 42 in. O.C. with
by min 0.016 in. thick (26 MSG) painted steel angle with 1 in. legs; or one hanger next to each duct outlet.
min 0.016 in.thick(26 MSG) painted steel channel, 1-5/8 in. deep with 8. Damper-Min 0.056 in. thick (16 gauge) galy steel. 20 by 20 in.
1 in. bottom flange and 3/4 in. top flange. Acoustical material held Protected on both surfaces with 1/16 in. ceramic fiber paper and held
securelyon steel framing members b means of hold-down clips, 1 4 in. open with a Fusible Link 9 Y P / p *. (Bearing the UL Listing Mark). Damper to l
wide,formed of 24 MSG spring steel and spaced 2 k O.C.along cross tees. overlap duct outlet 1 in. min.
(S)=Surface Perforations. In Lieu of the dampers described above, Duct Outlet Protection System A, 1 j
Armstrong World Industries,Inc.-Type 1/2,5/8 or 3/4 in.P(S). as described in the Design Information Section may be used with steel
Type P (S) 15 mm thick 600x12OO mm. These metric size panels ducts.
may only be used with metric size grid described under item 10A. 9. Air-Diffuser Protection-24- by 24- by 1/2-in, thick Acoustical kq
14. Wood Hanger Block-2 by 4 in.,installed between and perpendicular to Material*,with hole cut out of center to fit around air outlet and placed I`
wood joists. Located to support duct suspension straps and hanger wire on top of diffuser. (S)-Surface Perforations.
1-1/2 in.below subftooring at sides of light fixtures wherever duct straps Armstrong World Industries, Inc.-Type P(S). r II
and hanger wires are located between wood joists. 10. Hanger Wire-Galy steel 12 SWG min diam,attached to woodjoists with
*Bearing the UL Classification Marking Sd common nails driven approx 7-1/2 in. from bottom of the joists, +�
spaced not over 48 in. O.C. along main runners. Nails to be bent flush - - l
with joists. Wires to occur at all four corners of each light fixture, at =,
Design No. L210 midspan of cross tees at the sides of Light fixtures,and adjacent to main III
runner splices.
Unrestrained Assembly Rating-1 Hr. 11. Steel Framing Members*-Main runners 12 it Long, spaced 48 in. OC. '7
Unrestrained Beam Rating-1 Hr. Cross tees,nom 48 in.long,perpendicular to main runners and spaced 24
in.OC.Cross tees, nom 24 in. long,installed perpendicular to 48 in.Lon dYz.
Finish Rating-18 Min. cross tees. 9 P P 9 � �`�'- I'
Armstrong World Industries, Inc.-Types AFG, AFG-A, FG, s,
*Nominal Dimensions FST-6000,-6000A, -8000,-8000A.Type GLBP(consisting of main
runners,4 ft cross tees and steel straps)for use with 24 by 48 by
5/8 or 3/4 in. thick Type P Lay-in panels.
1 2 3 4 7 6 8 I 2 3 6 5 I ■ CGC Interiors-Type DXL x li
Chicago Metallic Corp.-Types 250,260, 1250, 1260,1850, 1860.
I ( USG Interiors, Inc.-Type
I 9 8 !f q 8/1 8"� 11A. Steel Framing Members*-Metal pans-(Not shown) (Optional)- 'l
Channel-shaped metal pans in various colors and finishes, installed
13 10 7 24-1/2* perpendicular to cross tees or main runners and spaced 4 or 6 in. OC.The
c'
i Range edges of the metal pans engage and interlock with the vertical
9 - _- - -c tabs of the corresponding grid adapters with tabs 4 or 6 in.OC.(See Item
- '--- -)-. IIB). End laps joints of the metal pans shall occur adjacent to main l
r2 w D u l2 ra 13 runners or cross tees.The metal pans shall each be supported by at least h,
1/2 two main runners or cross tees. r
Beam-WBx20, min size. Chicago Metallic Corp.-Type 1650.
1. Finish Flooring-1 by 4 in., T&G; laid perpendicular to joists, or 19/32 11B. Steel Framing Members--Grid adapter-(Not shown) (Optional)-For
use with Type 1650 metal pans (See Item 11A). Angle shaped adapter •'�
in.plywood,min grade"Underlayment'or"Sturd-l-Floor'with T&G long with a looped return flange; installed parattel to cross tees or main
edges, and conforming with PS 1-83. Face grain of plywood to be runners by engaging return flange of adapter to the flange of the cross f
perpendicular to joists with joints staggered.
SA. Alternate Finish Flooring-The alternate finish flooring may consi tee or main runner. The 48 or 24 in. long adapters are intended for use
st of with cross tees or main runners, respectively.
the following: Chicago Metallic Corp.-Type 1650.
System No. 1 11C. Steel Framing Members*-Filter strips-(Not shown) (Optional)-For
Floor Topping Mixture*-10-13 gal. of water to 170 lbs of floor topping use with Type 1650 metal pans. Filler strips are 0.018 to 0.024 in.thick,
mixture to 595 Lbs. of sand. Compressive strength 900 psi minimum. steel or aluminum, 13/32 or 5/8 in. deep by 3/4 in. wide, placedf'.. t
Thickness to be 1 in. minimum. Building paper(Item 2) optional. between the metal pans. ;
Floor Crete Systems, Inc.-Type II. Chicago Metallic Corp.-Type 1650. " "X;,
System No. 2 11D. Steel Framing Members*-9/16 in. wide narrow flange grid may be i
Floor Topping Mixture*-Foam concentrate mixed 40:1 by volume with used as an alternate to 15/16 in.wide flange grid systems. Main runners, .
water and expanded at 100 psi through a foam nozzle. Mix at rate of 1.4 nom 12 it Long spaced 4 it OC. Cross tees, nom 4 ft Long, installed ,
cu ft of preformed foam to 94 this Type I Portland Cement and 300 lbs of perpendicular to main runners and spaced 2 k OC. Cross tees, nom 2 it C
sand with approximately 5.5 gal of water. Cast density of Floor Topping Long,installed perpendicular to 4 it cross tees and spaced 4 ft OC. For use p
Mixture 100(+or-) 5 pcf.Min compressive strength 1000 psi.Thickness with Type P, nom 24 by 24 in, square edge or tegular edge lay-in panels.
1-1/2 in. - Grid modules containing Light fixtures must employ a fixture centering ,
Elastizell Corp. of America-Type FF. clip at each corner. The 24 gauge electrogalvanized steel clip is nested „
System No. 3 on the Range of the intersecting grid tees, has two 1-7/16 in. high legs
Floor Topping Mixture*-foam concentrate mixed 40:1 by volume with with their sides perpendicular to each other and a U-shaped return at the •, -
water and expanded at 100 psi through a foam nozzle. Mix at rate of 1.4 to of each le for engagingover the bulb of the intersecting rid tees. t
P 9 9 9
cu k of preformed foam to 94 this Type I Portland Cement, 62.5 lb of Pea Armstrong World Industries, Inc. -Type FSLK. }
Gravel and 312.5 lbs of sand, with approximately 5.5 gal of water. Cast 12. Fixtures, Recessed light-(Bearing the UL Listing Mark). Fluorescent „``s,
density of Floor Topping Mixture 100 (+ or -) 5 pcf. Min compressive lamp type,steel housing, 2 by 4 ft size.Fixtures spaced so their area does
strength 1000 psi. Thickness 1 in. not exceed 24 sq k per 100 sq it of ceiling area. Wired in conformance
Lite-Crete, Inc.-Type I. with the National Electrical Code.Fixtures and ballasts must be considered li
2. Building Paper-Commercial rosin-sized; 0.010 in. thick. for these ambient temperature conditions before installation. I�
3. Subfloor-1 by 6 in. T&G. Placed diagonally to joists, or 15/32 in. 12A. Fixture Stabilizer-(Not shown)-For use with the Type 1650 metal
plywood, min grade "C-D" Exposure 1 or "C-D" with exterior glue, and pans (Item 13A) and the 2 by 4 ft size light fixture (Item 12); one min
conforming with PS 1-83. Face grain of plywood to be perpendicular to 0. 47 in.thick(16 MSG)gaty steel channel yoke per light fixture,secured
0
joists with joints staggered. to the web at midspan of cross tee on each side of fixture. `:
4. Bridging-1 by 3 in. 126. Fixture, Recessed It
the UL Listing Mark)-(Not
5. Wood Joists 2 by 10 in., 16 in. O.C. 11 estopped. Shown)-As an alternate to Item 13, incandescent lamp type, steel
6. Nailing Strip-Cut to Ht between ends of joists framing into beam and housing, nom 6-1/2 in. diam by 7-1/2 in. high. Each fixture provided "ti I6
to be Rush with top of joists. with a nom 6-1/2 in. by 30 in. painted steel base plate screw-attached Y
7. Air Dutt-Made of gaty sheet steel with area of duct openings not to to the"high hat"fixture with four steel screws. Base plate to be provided
exceed 227 sq in. per each 100 sq k of ceiling area. Area of individual with steel bar hangers designed to span across mom 24 in. spacing of
duct opening not to exceed 227 sq in. Max dimension of opening 17 in. cross tees for fixture support. Fixture supported from wood joists,
Supported by No. 16 MSG, 36 in. long cold-rolled channels, 3/4 rn. wide independent of ceiling cross tees, with steel hanger wires secured to '.
and 1-1/2 in.deep,suspended from the joists with No. 12 SWG galy wire steel bar hangers near each corner of the base plate.A max of two"high
^ L
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FIRE RESISTANCE DIRECT, J(BXRH) fF__,RESISTANCE DIRECTORY(BXRH) 345
FIRE RESISTANCE RATINGS - ANSI/UL263 (BXUV)-Continued FIRE RESISTANCE RATINGS - ANSI/UL263 (8XUV)-Continued
y hat' fixtures may be substituted for each nom 24 by 48 in, fixture Hacker Industries, Inc.-Firm-Fill, Firm-Fill 2010, Firm-FiIL High
permitted in the ceiling (max six "high hat" fixtures per 100 sq it of Strength, Gyp-Span Radiant.
ceiling area). Wired in conformance with the National Electrical Code. Floor Mat Materials*-(Optionat)-Floor mat material nom 1/4 in.thick
13. Fixture Protection-Acoustical Material*-Same as Item 14. Cut into adhered to subfloor with Hacker Floor Primer. Primer to be applied to the
pieces to form a 5 sided enclosure, trapezoidal in cross-section, approx surface of the mat prior to the placement of a min 1-1/2 in. of
1/2 in.longer and wider than the fixture with sufficient depth to provide floor-topping mixture.
+ at Least 112 in. clearance between the fixture and the enclosure. The Hacker Industries, Inc.-Type Sound-Mat.
pieces are held together by 8d common nails spaced max 12 in. OC. 2. Building Paper-Commerciat resin-sized, 0.010 in.thick.
13A. Fixture Protection-Acoustical Material*-For use with "high hat" 3. Subftooring-1 by 6 in. T&G fastened diagonally to joists, or 15/32 in.
light fixtures (Item 12B). Five sided enclosure, rectangular in cross plywood, min grade "C-D" Exposure 1 or "C-D" with exterior glue and
section, approximately 1 in longer and wider than fixture with sufficient conforming with PSI-83. Face grain of plywood to be perpendicular to
depth to provide I in.clearance to the top of the fixture.Pieces cut from joists with joints staggered.
same acoustical material used in the ceiling (Item 14) and assembled. 4. Bridging-1 by 3 in. or 1 by 4 in.
using Type 8d nails. One side of the fixture protection enclosure may be 5. Wood Joists-2 by 30 in. spaced 16 in. OC, firestopped.
cut 1 in. shorter than the height of the enclosure such that a 1 in. high 6. Insulated Ceiling Membrane-See Items 9 through 28 of Design No,
clearance is maintained between its top and the top of the enclosure. P237 for description of ceiling materials and details of ceiling installation.
14. Acoustical Material*-Nom 24 by 24 or 48 in. lay-in panels. Border The hanger wires used to suspend the ceiling shall be supported from 16d
panels supported by min 0.016 in. thick (26 MSG) painted steel angle nails driven through the wood joists, 5 in. below the subfloor, and bent
with 7/8 in.legs;or min 0.016 in.thick(26 MSG)painted steel channel, upward at both ends for positive support. Where banger wire locations
1-5/8 in. deep with 7/8 in. flange. No. 27 MSG spring-steelhold-down occur between joists, hanger wire shall be supported from wood hanger
clips, 3/8 in. wide, placed over web of cross tees, spaced 24 in. OC. blocks.The wood hanger blocks consists of nom 2 by 4 in. lumber nailed
Armstrong World Industries,Inc.-Type 5/8 or 3/4 in.Type P(S). with 16d nails(two at each end)between joists near the joist mid-depth.
15. Mineral and Fiber Boards*-(Optional, not shown) -Applied over *Bearing the UL Classification Marking
wood floor with no limit on overall thickness. See Mineral and Fiber
Boards (CERZ) category at the end of this directory for names of
manufacturers.
16. Roof Covering-(Not shown)-For use with roof insulation in Item 15. Design No. L212
q' Class A, B or C Built-Up Roof Covering Materials* consisting only of felt Unrestrained Assembly Rating-1 Hr.
and asphalt(or coal tar pitch)materials in alternate layers.See Building Finish Ratin 17 Min
Materials Directory. g-
'Bearing the UL Classification Marking
*NOMINAL DIMENSION
1 2 3 9
Design No. L211
Unrestrained Assembly Rating-2 Hr "
Finish Rating-75 Min Io,. r
s ) s gl�.
1 2 a a y MOAUNAL MMENSIONS B
s I ,
/ 1. Finish Flooring-1 by 3 in. or 1 by 4 in. T&G and end matched Laid
perpendicular to joists, or 19/32 in. plywood, min grade"Underlayment"
or'Sturd-I-Floor"with T&G long edges and conforming with P5I-83.Face
t� ) grain of plywood to be perpendicular to joists with joints staggered.
..• '�'��• f r - r 1 IA. Alternate Finish Flooring-The alternate finish flooring may consist of
p• II s the following:
'�7 l System No. 1
•- Floor Topping Mixture*-10-13 gal. of water to 170 His of floor topping
ial' rvY a•w mixture to 595 tbs. of sand. Compressive strength 900 psi minimum.
1. Finish flooring-1 by 3 in. or 1 by 4 in. T&G and end matched laid Thickness to be 1 in. minimum. Building paper(Item 2) optionaL
perpendicular to joists, or 19/32 in. plywood, min grade"Underlayment" Floor Crete Systems, Inc-Type II.
or"Sturd-I-Floor"with T&G tong edges and conforming with PSI-83.Face System No. 2
rain of plywood to be perpendicular to joists with joints staggered. Floor Topping Mixture*-Foam concentrate mixed le. ix volume with
9 p y p p > > co water and expanded at Sto psi through a foam nozzle.Mix at rate of 1.4
lA. Alternate Finish Flooring-The alternate finish flooring may Consist of cu k of preformed foam to 94 His Type I Portland Cement and 300 tbs of
the following: sand with approximately 5.5 gal of water. Cast density of Floor Topping
System No. 1 Mixture 100(+or-) 5 pcf.Min compressive strength 1000 psi.Thickness
Floor Topping Mixture*-10-13 gat.of water to 170 lbs.of floor topping 1-1/2 in.
mixture to 595 lbs. of sand. Compressive strength 900 psi minimum. Elastizell Corp. of America-Type FF.
Thickness to be 1 in. minimum. Building paper(Item 2) optional. System No. 3
Floor Crete Systems, Inc.-Type II. Floor Topping Mixture*-Foam concentrate mixed 40:1 by volume with
System No. 2 water and expanded at 100 psi through a foam nozzle. Mix at rate of 1.4 cu ft
Floor Topping Mixture*-Foam concentrate mixed 40:1 by volume with of preformed foam to 94 tbs Type I Portland Cement,62.5 tb of Pea Gravel and
water and expanded at 100 psi through a foam nozzle. Mix at rate of 1.4 -312.5 tbs of sand, with approximately 5.5 gat of water. Cast density of Floor
cu ft of preformed foam to 94 tbs Type I Portland Cement and 300 tbs of Topping Mixture 100 (+ or -) 5 pcf. Min compressive strength 1000 psi.
sand with approximately 5.5 gal of water. Cast density of Floor Topping Thickness 1 in.
Mixture 100(+or-) 5 pcf.Min compressive strength 1000 psi.Thickness Lite-Crete, Inc.-Type I.
1-1/2 in. System No. 4
Elastizell Corp. of America-Type FF. Floor Topping mixture*-6.8 gat of water to 80 tbs of floor topping mixture
System No. 3 to 1.9 cu it of sand. Min compressive strength 1000 psi, thickness 1 in.
Floor Topping Mixture--Foam concentrate mixed 40:1 by volume with Hacker Industries, Inc.-Firm-Fill, Firm-Fill 2010, Firm-Fill High
water and expanded at 100 psi through a foam nozzle. Mix at rate of 1.4 cu ft Strength, Gyp-Span Radiant.
of preformed foam to 94 tbs Type I Portland Cement,62.5 lb of Pea Gravel and Floor Mat Materials*-(Optionat)-Floor mat material nom 1/4 in.thick
312.5 tbs of sand, with approximately 5.5 gat of water. Cast density of Floor adhered to subfloor with Hacker Floor Primer.Primer to be applied to the
Topping Mixture 100 (+ or -) 5 pcf. Min compressive strength 1000 psi. surface of the mat prior to the placement of a min 1-1/2 in. of
Thickness 1 in. floor-topping mixture.
Lite-Crete, Inc.-Type I. Hacker Industries, Inc.-Type Sound-Mat.
System No. 4 2. Building Paper-Commercial resin-sized, 0.010 in. thick.
Floor Topping Mixture*-6.8 gat of water to 80 tbs of floor topping mixture 3. Subfiriming-1 by 6 in.T&G fastened diagonally to joists, or 15/32 in.
to 1.9 cu R of sand. Min compressive strength 1000 psi, thickness 1 in. plywood, min grade "C-D" Exposure I or "C-D" with exterior glue and
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