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<br /> I
<br />I ~ hrs. I
<br />I
<br /> I
<br /> It
<br /> !
<br /> '~
<br /> :
<br />1 ~ hrs.
<br />1 ~ hrs.
<br />hr. e
<br />-
<br />
<br />Letter superscripts refer to notes, page 47.
<br />20
<br />
<br />Letter superscripts refer to notes, page 47.
<br />37
<br />
<br />Steel 2~ in. concrete slabY on metal lath. Ceiling : ~ in.
<br />Joists sprayed asbestos fiber on metal lath. (33) ..................
<br />(Fabricated 2~ in. concrete floor slabY on metal lath, or 2 in. re-
<br />fro~ Rolled inforced gypsum tile covered with ~ in. mortar finish,
<br />Sectlons.or on joists. Ceiling of ~ in. 1:2 1:3 gypsum and sand
<br />froSh St~IP plaster on metal lath. (9) ",..:.."".......,...........",...,......",.
<br />
<br />S~eel)e~r 2~ in. floor slab consisting of 2 in. reinforced gypsum
<br />Steel concrete on ~ in. gypsum form boards. Ceiling of
<br />Beamsu ~ in. gypsum-perlite plaster on ~ in. perforated gyp_
<br />sum lath attached to ~ in. furring channels spaced
<br />12 in. on centers, with interlocking wire clips giving
<br />continuous support to lath. 14 gauge galvanized wire
<br />secured diagonally to clips or channels at each inter-
<br />section. Plaster mix: scratch coat 2 cu. ft. and brown
<br />coat 3 cu. ft. perlite to 100 Ibs. gypsum. (88)) ............
<br />2 in. limestone concrete on paper-backed wire fabric.
<br />Ceiling of ~ in. thick D.L. listed perforated acous-
<br />tical tile attached to joists with special clips and
<br />suspension splines. Special clips attached to :l4
<br />in. channels spaced 4 ft. on center. 4 in. D.L. listed
<br />insulating batts placed on top of unexposed surface
<br />of acoustical tile. Other details as specified in D.L.
<br />listingc, under Floor or Roof, and Ceiling Construc-
<br />tions-Design No. 1-2 HR. ..............,.....................,...........
<br />2 in. concrete floor slabY on metal lath, or 2 in. rein-
<br />forced gypsum tile, on joists. Ceiling of :l4 in. 1 :2,
<br />1:3 gypsum and sand plaster, or ~ in. 1 :2, 1:3
<br />portland cement and sand plaster with 3 lb. asbestos
<br />fiber and 15 lb. hydrated lime per bag cement, on
<br />metal lath. (9) ........,..".......,.,.....,..",.........,..."...........",..."..
<br />2 in. concrete slabY on metal lath. Ceiling of 1 in.
<br />gypsum-perlite plaster, applied to ~ in. perforated
<br />gypsum lath attach to ~ in. furring channels spaced
<br />16 in. on centers, with interlocking wire clips giving
<br />continuous support to lath. Plaster mix: scratch coat
<br />2 cu. ft. and brown coat 3 cu. ft. perlite to 100 Ibs.
<br />fibered gypsum. (65) ..................,.__..,..............,..................
<br />2 in. floor slab, consisting of 1~ in. reinforced gypsum
<br />concrete on ~ in. gypsum form boards. Ceiling
<br />of 1711 in. gypsum-perlite plaster on ~ in. perforated
<br />gypsum lath, attached to ~ in. furring channels.
<br />spaced 12 in. on centers, with interlocking wire clips
<br />giving continuous support to lath. Plaster mix: scratch
<br />coat 2 cu. ft. and brown coat 3 cu. ft. perlite to 100 Ibs.
<br />fibered gypsum. (65) ...........,...................,.......""...............
<br />2 in. concrete slabY on metal lath. Ceiling: ~ in.
<br />sprayed asbestos fiber on metal lath. (33) ...,...".........
<br />2 in. (measured from face of lath) reinforced concrete
<br />slab on metal lath. Ceiling of ~ in. D.L. listed wan
<br />boardcc or ~ in. D.L. listed coreboardcc, secured to
<br />~ in. furring channels, with sheet-metal screws, or
<br />~ in, nailing channels with 1 ~ in. nails. Joints in
<br />wallboard or coreboard not taped or cemented. Other
<br />detaiis as specified in U.L. listingc, under Floor or
<br />Roof, and Ceiling Constructions-Design No. 5-1 HR.
<br />
<br />.
<br />
<br />· Nonbearing.
<br />
<br />Solid
<br />Gypsum
<br />Board
<br />Partitions
<br />(Without
<br />steel
<br />framing)
<br />
<br />2 in. total thickness consisting of 1 in. D.L. listed inter-
<br />locking laminated gypsum coreboard placed vertically
<br />and set in floor and ceiling runners made of 20 gauge
<br />sheet metal. ~ in. D.L. listed wallboard applied to
<br />the coreboard vertically and secured to the coreboard
<br />by an adhesive coating. Wallboard joints butted and
<br />staggered with joints of coreboard. Outside joints
<br />covered with tape and joint finisher. Other details
<br />as specified in D.L. Iistingc, under Walls and Parti-
<br />tions-Design No. 3-2 HR
<br />
<br />2 hrs..
<br />
<br />Type
<br />
<br />Details
<br />
<br />FIRE ISISTANCE RATINGS
<br />
<br />FLOOR AND CEILING CONSTRUCTIONS-Continued
<br />Fire Resistance Ratings Based on Standard Fire Tests
<br />
<br />of
<br />
<br />Construction
<br />
<br />1~ hrs.
<br />
<br />2 hrs.
<br />
<br />Rating
<br />
<br />2 hrs.
<br />
<br />2 hrs.
<br />
<br />2 hrs.
<br />
<br />.
<br />
<br />e
<br />
<br />.
<br />
<br />"
<br />
<br />
<br />
<br />(,
<br />
<br />1\
<br />
<br />.
<br />
<br />e
<br />
<br />Shotcrete
<br />
<br />Precast
<br />Concrete
<br />Wan
<br />Sections
<br />
<br />Type
<br />
<br />FIRE RESISTANC~TINGS
<br />
<br />WALLS AND PARTITIONS-Continued
<br />Fire Resistance Ratings Based on Standard Fire Tests
<br />
<br />
<br />Detail. of Construction I Rating
<br />
<br />
<br />6 in. hollow panels of pumice concrete; core holes
<br />3~ in. to 3~ in., face shell thickness 1 in. to 1~ in.
<br />Panels held in alignment and secured together by
<br />removing top 5 in. of webs in each panel, and core
<br />holes, joints and top 5 in. filled with 1 :5.33 cement
<br />salld grout. Joints and top of panels reinforced with
<br />~ in. reinforcing bar. (101) .............................................. 4 hrs..
<br />
<br />2 in. precast concrete slabs of expanded shale aggregate,
<br />16 in. by 8 ft. laid horizontally and attached each side
<br />of 8 in. steel columns spaced 011 8 ft. centers. Hori-
<br />zontal joints shiplap type, sealed with mastic. Ver-
<br />tical joints butt type centered over columns and calked
<br />with asbestos wicking and sealed with mastic. (77) 2~ hrs..
<br />
<br />
<br />6~ in. solid wall composed of 1:4 portland cement and
<br />perlite concrete aggregate mixture, applied with spray
<br />gun equipment to paper-backed wire fabric, and re-
<br />inforced with 16 gauge 2 in. by 2 in. welded wire
<br />mesh fastened to 3~ in. steel channel studs. Other
<br />details as specified in D.L. listing.: under Walls and
<br />Partitions-Design No. 5-4 HR. ".........".,......",.........,.. 4 hrs.
<br />
<br />4~ in. solid wall composed of 1 cu. ft. portland cement
<br />to 4 cu. ft. D.L. listed vermiculite plaster aggregate,
<br />applied with spray machine equipment to paper-backed
<br />wire fabric. Wall reinforced with 1~ in. steel chan-
<br />nel studs 2 ft. on centers and spaced 1~ in. from
<br />paper-backed wire fabric. Other details as specified in
<br />D.L. Iistingc, under Walls and Partitions-Design
<br />No. 6-5 HR. ,.....................,..,................,.,..................,.......... 4 hrs..
<br />
<br />6 in. solid wall composed of 1:4 portland cement and
<br />sand mixture, applied with spray gun equipment.
<br />Wall reinforced with ~ in. round bars on 12 in.
<br />centers each way at the mid-thiclmess of the wall.
<br />
<br />(72) .......,.....,',.."......,.",..,..."...................""..,..,..."................. 3 hrs..
<br />
<br />2~ in. total thickness of 4~:1:7 portland cement, saw-
<br />dust and sand mortar sprayed on 4 in. by 4 in. welded
<br />wire fabric on steel studs. (9) 1 hr..
<br />
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