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<br />refer to notes,
<br />39
<br />
<br />refer
<br />18
<br />
<br />Letter superscripts
<br />
<br />to notes,
<br />
<br />page 47.
<br />
<br />., L__
<br />.J 1110.
<br />
<br />.
<br />
<br />e
<br />
<br />· Nonbearing.
<br />
<br />One side sheathed with 1 in. magnesium oxysulphate
<br />wood fiberboard attached to studs, 1 in. air space and
<br />3~ in. brick secured with metal ties to studs every
<br />fifth course. Other side faced with ~ in. gypsum-
<br />vermiculite plaster on metal lath secured directly to
<br />studs. (9)
<br />
<br />Letter superscripts
<br />
<br />page 47.
<br />
<br />2 hrs.
<br />
<br />3 hn.
<br />
<br />3 hrs.
<br />
<br />'l
<br />,~
<br />:
<br />
<br />Steel Stud
<br />Brick-
<br />Veneered
<br />Wallsz
<br />
<br />One side sheathed with paper-backed wire lath and
<br />3~ in. brick veneer secured by filling 1 in. space
<br />between brick and lath with mortar. Other side faced
<br />with 1 in. paper-enclosed mineral-wool blanket weigh-
<br />ing 0.6 lb. per sq. ft. attached to studs j metal lath
<br />laid over blanket and attached to studs, covered with
<br />~ in. 1 :2, 1:3 gypsum and sand plaster. (9).........,....,.
<br />
<br />One side with ~ in. gypsum sheathing nailed to 2 5/16
<br />in. studs, and 3~ in. brick veneer secured with metal
<br />ties to studs every fifth course. Other side ~ in.
<br />1:2 gypsum and sand plaster on ~ in. perforated
<br />gypsum lath. (78) ",.""'......,..,.,,,,'...,..
<br />
<br />2 hrs.
<br />
<br />4 hrs.
<br />
<br />3 hrs.
<br />
<br />2 in. total thiclmess of ~ in. 1 :1, 1:2 gypsum and sand
<br />plaster each side ~ in. gypsum lath inserted at top
<br />and bottom in steel runners. (41 )
<br />
<br />1
<br />
<br />hr..
<br />
<br />in. total thickness of 13/16 in. I, 1:2 gypsum and
<br />sand plaster each side ~ in. gypsum lath inserted at
<br />top and bottom in steel runners. (37)
<br />
<br />hr..
<br />
<br />3 hrs.
<br />
<br />.
<br />
<br />.
<br />
<br />2
<br />
<br />2 in. total thickness consisting of ~ in. U.L. listed
<br />gypsum lath, faced on both sides with ~ in. 1:1
<br />gypsum and sand plaster. Lath set into steel channels
<br />at floor, ceiling and abutting walls, as specified in
<br />U.L. listingc under Walls and Partitions-Design
<br />No. 4-1 HR
<br />
<br />1
<br />
<br />hr..
<br />
<br />Steel
<br />Joists
<br />(Fabricated
<br />from Rolled
<br />Sections or
<br />from Strip
<br />or Sheet
<br />Steel) or
<br />Steel
<br />Beamsu
<br />
<br />2~ in. concrete slabY on metal lath, or 2 in. reinforced
<br />gypsum slabs covered with ~ in. mortar, on joists.
<br />Ceiling of 1 in. gypsum-vermiculite plaster propor-
<br />tioned within the range of 3~ to 5~ cu. ft. vermiculite
<br />per 100 lb. gypsum, on metal lath. (9) ......'...."..............,
<br />
<br />2 in. concrete slaby on metal lath, or 2 in. precast
<br />reinforced portland cement concrete or gypsum slabs,
<br />on joists, the precast slabs to be finished with top
<br />coating of ~ in. mortar. Ceiling of 2 in. reinforced
<br />gypsum tile anchored to joists with metal ties and
<br />covered with ~ in. 1:3 gypsum and sand plaster. (9)
<br />
<br />2 in concrete slabY on metal lath. Ceiling of 1 in.
<br />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. Plaster reinforced with
<br />20 ga. wire mesh. Wire mesh attached to furring
<br />channels at joints in lath. Plaster mix: scratch coat
<br />2 cu. ft. and brown coat 3 cu. ft. perlite to 100 Ibs.
<br />gypsum. (65)
<br />
<br />4 hrs.
<br />
<br />2 in. total thickness of 1 :2 gypsum and sand plaster, ap-
<br />plied equally each side of metal lath attached top and
<br />bo~tom to steel runners. (67)
<br />
<br />1
<br />
<br />hr..
<br />
<br />4 hrs.
<br />
<br />2 in. total thickness consisting of ~ in. gypsum lath,
<br />faced on both sides with ~ in. gypsum and sand
<br />plaster. Top of lath attached to steel ceiling runner,
<br />and bottom engaged in groove of a wooden floor
<br />runner impregnated with fire retardant chemicals.
<br />Plaster mix for scratch coat 1:1 and brown coat 1:2
<br />gypsum and sand. (54)
<br />
<br />1
<br />
<br />hr..
<br />
<br />2 in. total thickness consisting of ~ in. gypsum lath,
<br />faced on both sides with ~ in. gypsum-,perlite plaster.
<br />Scratch coat 2 cu. ft. and brown coat 3 cu. ft. of
<br />perlite to 100 Ibs. gypsum. (63)
<br />
<br />1~ hrs..
<br />
<br />4 hrs.
<br />
<br />Solid
<br />Plaster
<br />Partitions
<br />(Without
<br />steel
<br />framing)
<br />
<br />2~ in. total thickness consisting of ~ in. gypsum lath,
<br />faced on both sides with 1 in. gypsum-vermiculite
<br />plaster. Scratch coat 2 cu. ft. and brown coat 3 cu. ft.
<br />vermiculite to 100 Ibs. fibered gypsum. (79) ................
<br />
<br />2
<br />
<br />hrs..
<br />
<br />.'
<br />
<br />Type
<br />
<br />DetaU. of Construction
<br />
<br />Rating
<br />
<br />Type
<br />
<br />Details
<br />
<br />of
<br />
<br />Construction
<br />
<br />Rating
<br />
<br />Fire Resistance
<br />
<br />Ratings
<br />
<br />Based on Standard Fire Tests
<br />
<br />.
<br />
<br />,~
<br />
<br />.'
<br />
<br />Fire
<br />
<br />WALLS
<br />Resistance
<br />
<br />Ratings
<br />
<br />Based on Standard Fire
<br />
<br />Tests
<br />
<br />FLOOR AND CEILING CONSTRUCTIONS-Continued
<br />
<br />FIRE
<br />
<br />-
<br />
<br />RESISTANCE
<br />
<br />RATINGS
<br />
<br />2 in. concrete floor slabY on metal lath, or 2~ in. re-
<br />inforced portland cement concrete plank with joints
<br />thoroughly grouted, on joists. Ceiling of 1 in. gypsum-
<br />vermiculite plaster (measured from face of lath) O!l
<br />metal lath. Plaster mix: 4:1 by weight or approx.
<br />100 Ibs, fibered gypsum to 2~ cu. ft. vermiculite.
<br />
<br />(32) .......................,........,'..",...,.............,.....,...,.",...................
<br />2~ in. concrete floor slabv on metal lath, or 2 in. re-
<br />inforced gypsum tile covered with ~ in. mortar, on
<br />joists. Ceiling of 1 in. unsanded wood-fibered gyp-
<br />sum plaster, or ~ in. gypsum-vermiculite plaster pro-
<br />portioned within the range of 3~ to 5~ cu. ft. ver-
<br />miculite per 100 lb. gypsum, on metal lath. (9) _"......
<br />2~ in. reinforced gypsum concrete on ~ in. gypsum
<br />plaster board on joists. or 2~ in. cinder concrete on
<br />metal floor lath on joists. Ceiling of 2 in. .pre-
<br />cast, reinforced gypsum ceiling tile suspended ~ in.
<br />below 1 in. furring channels in turn suspended ~ in.
<br />below joists; gypsum ceiling tile corrugated on under
<br />surface for effective plaster bond; all joints grouted
<br />with gypsum; ceiling finished with ~ in. 1:1 gypsum
<br />and sand plaster. ( 17) ........._..........................................
<br />2~ in. reinforced gypsum concrete on ~ in. gypsum
<br />plaster board on joists. Ceiling of 2~ in. reinforced
<br />gypsum concrete attached to bottoms of joists, plas-
<br />tered with ~ in. gypsum and sand plaster; reinforce-
<br />ment 1 in. above bottom of ceiling slab. (18) ."....,...:..
<br />2 in. precast, reinforced gypsum slabs on joists; joints
<br />grouted with gypsum. Ceiling of 2 in. precast, rein-
<br />forced gypsum attached to bottoms of joists; joints
<br />grouted with gypsum; plastered with ~ in. gypsum
<br />. t t. ,,,^,
<br />ana sana pICLsu:r. \~VJ
<br />
<br />e
<br />
<br />e
<br />
<br />AND PARTITIONS-Continued
<br />
<br />FIRE RESISTANCE ITINGS
<br />
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