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<br />Letter superscripts
<br />
<br />refer to notes,
<br />22
<br />
<br />page 47.
<br />
<br />..
<br />
<br />.
<br />
<br />35
<br />
<br />· Nonbearing. t Rated as
<br />framed into the wall.
<br />t With combustible members frameda into the wall,
<br />~ With combustible members frameda into the wall,
<br />Letter superscripts refer to notes,
<br />
<br />the rating
<br />the rating
<br />page 47.
<br />
<br />2 in. perlite concrete (minimum thickness over cells) on
<br />top of U.L. listed cellular steel floor units. Ceiling
<br />of 1 in. (measured from face of lath) gypsum-perlite
<br />plaster on metal lath, with back plaster on lath to be
<br />not less than 1 in. Lath supported not less than 3 in.
<br />from underside of steel floor units. Plaster mix:
<br />scratch and brown coat 2 to 3 cu. ft. U.L. listed perlite
<br />to 100 Ibs. fibered gypsum. Other details as specified
<br />in U.L. listingc, under Floor or Roof, and Ceiling
<br />Constructions-Design No, 3-4 BY
<br />
<br />Steel
<br />Unitsu,
<br />Cellular
<br />
<br />2 in. cinder concrete (minimum thickness over cells)
<br />on top of U.L. listed cellular steel floor units. Ceil-
<br />ing ~ in. (measured from face of lath) gypsum-
<br />vermiculite plaster on metal lath supported by ~ in.
<br />furring channels attached to 1 ~ in. runner channels
<br />secured to bottom of floor units. Plaster mix:
<br />scratch coat 2 to 2~ cu. ft. and brown coat 3 to 3Ya
<br />cu. ft. U.L. listed vermiculite to 100 Ibs. fibered gyp_
<br />sum. Other details as specified in U.L. listingc, under
<br />Floor or Roof, and Ceiling Constructions-Design
<br />No. 1-4 HR
<br />
<br />-1
<br />
<br />hr::.
<br />
<br />2
<br />3
<br />
<br />3
<br />
<br />load bearing
<br />
<br />is 2 hrs.
<br />is 2Va hrs.
<br />
<br />with noncombustihle,
<br />
<br />Or
<br />
<br />10 memhers,
<br />
<br />3 hrs..
<br />
<br />1Va hrs..
<br />1 hr..
<br />1 hr..
<br />
<br />4 hrs.
<br />
<br />.~
<br />
<br />t
<br />
<br />,(
<br />
<br />Gypsum
<br />Block
<br />Partitions
<br />
<br />3
<br />3
<br />4
<br />
<br />4 hrs..
<br />
<br />3 hrs..
<br />3 hrs..
<br />
<br />4
<br />
<br />Va
<br />
<br />in.
<br />
<br />1
<br />
<br />:3
<br />
<br />6 in. unplastered
<br />brick. (60)
<br />
<br />in. concrete on steel plate deck. Ceiling of ~ in
<br />1 :2, 1:3 gypsum and sand plaster on metal lath. (33)
<br />
<br />1
<br />
<br />hr.
<br />
<br />1 Va in. concrete on steel plate deck. Ceiling of ~ in.
<br />1 :2, 1:3 gypsum and sand plaster on metal lath. (9)
<br />
<br />2 in. concrete on steel plate deck. Ceiling of ~ in. 1 :2,
<br />1:3 gypsum and sand plaster, or 1 in. 1 :2, 1 :2Va
<br />portland cement and salld plaster with 10 lb. hydrated
<br />lime added per bag cement, on metal lath. (9) ......."",
<br />
<br />2 in. concrete on steel plate deck. Ceiling of 2 in. inter-
<br />locking ullreinforced gypsum tile supported on upper
<br />face of lower beam flange, with Va ill. 1:3 gypsum
<br />and sand plaster. (9)
<br />
<br />1Va hrs.
<br />
<br />2 hrs.
<br />
<br />
<br />2 hrs.
<br />
<br />.
<br />
<br />.
<br />
<br />Concrete
<br />Masonry
<br />Units,
<br />Brick-faced
<br />
<br />Cinder Aggregate.
<br />4 in. units 63% solid; plastered on one side with Va ill.
<br />1:3 gypsum and sand plaster; other side faced with
<br />3~ in. brick. (9, 60)
<br />
<br />Expanded Shale Aggregate.
<br />6 in. units 61 % solid; unplastered; faced
<br />brick. (9, 60) .......'"".,"'.,....,......'.,...."........
<br />Expanded Slag Aggregate.
<br />4 in. units 63% solid; plastered on one side with Va in.
<br />1:3 gypsum and sand plaster; other side faced with
<br />3~ in. brick. (9, 60) ".......".......".....,'........,.,'...................
<br />
<br />Pumice Aggregate.
<br />4 in. U.L. listed concrete blocks, alternate courses rein-
<br />forced; unplastered; faced with 4 in. brick. 1 in.
<br />air space between block and brick. Other details as
<br />specified in U.L. listingc, under Walls and Partitions-
<br />Design No. 7-4 HR
<br />
<br />units, 61 %
<br />
<br />solid
<br />
<br />faced
<br />
<br />with 2~
<br />
<br />in.
<br />
<br />4 hrs. t
<br />
<br />4 hrs.t
<br />
<br />in. hollow blocks plastered each side with
<br />gypsum and sand plaster. (6, 83)....,.....,..
<br />
<br />in. hollow blocks plastered each side as above. (6, 82)
<br />in. solid blocks, unplastered. (6) ..............................,.......
<br />in. hollow blocks plastered on either side with Va in.
<br />1:3 gypsum and sand plaster. (45, 89) ..................'.......
<br />in. hollow blocks plastered on one side with ~ in.
<br />1:3 gypsum and sand plaster. (44)
<br />in. solid blocks, unplastered. (6, 9)
<br />in. hollow blocks, unplastered. (9)
<br />
<br />4 hrs.t
<br />
<br />with 2~
<br />
<br />4 hrs.t
<br />
<br />4 hrs.t
<br />
<br />Cinder Aggregate.
<br />10 in. unplastered cavity wall of two 4 in.
<br />apart; units 63% solid. (9, 60) .."".....,.....
<br />6 in. units 61 % solid; plastered on one side with Va in.
<br />1:3 gypsum and sand plaster. (9, 60)""",........,..........,.
<br />6 in. units 50% solid; plastered on both sides with Va in.
<br />1:3 gypsum and sand plaster. (9, 60)",......"...................
<br />6 in. units un plastered, 61 % solid. (9, 60) .".....,..."...,'.',..
<br />Siliceous Gravel Aggregate.
<br />12 in. unplastered wall, consisting of 8 in. units 57%
<br />solid and 4 in. units 67% solid. (9, 61)"..........,.............
<br />12 in. units 58% solid; plastered both sides with Va in.
<br />1:3 gypsum and sand plaster. (61) ...""'...",,,......,...,.....
<br />4 in. units 740/0 solid; plastered on both sides with Va in.
<br />1:3 gypsum and sand plaster. (9, 61),...."..",..,......".....
<br />
<br />in.
<br />
<br />2 in. concrete on steel plate deck. Ceiling of 1~ in. l:1
<br />gypsum and sand plaster, on metal lath; or ceiling of
<br />1~ in. 1:2 gypsum and sand plaster on ribbed metal
<br />lath. (9)
<br />
<br />2~ hrs.
<br />
<br />1
<br />
<br />hr.*
<br />
<br />4 hrs.t
<br />4 hrs.~
<br />
<br />2~ in. concrete on steel plate deck. Ceiling of 1
<br />gypsum and sand plaster on metal lath. (9)
<br />
<br />2~ in. cinder concrete plus ~ in. cement mortar finish,
<br />on steel plate deck. Ceiling of 1~ in. 1:1 gypsum
<br />and sand plaster on metal lath. (9)
<br />
<br />in.
<br />
<br />1:2
<br />
<br />2~ hrs.
<br />
<br />3 hrs.
<br />
<br />Steel
<br />Plate
<br />Deck on
<br />Steel
<br />Joists
<br />(or Beams)u
<br />
<br />2~ in. concrete on steel plate deck. Ceiling of 1 in.
<br />unsanded, wood-fibered gypsum plaster, or ~ in. gyp-
<br />sum-vermiculite plaster proportioned within the range
<br />of 3Va to 5Ya cu. ft. vermiculite per 100 lb. gypsum,
<br />on metal lath. (9)
<br />
<br />3 hrs.
<br />
<br />2 hrs.*
<br />1~ hrs..
<br />
<br />3 hrs.t
<br />2 hrs.*
<br />
<br />Concrete
<br />Masonry
<br />Units
<br />
<br />wythes
<br />
<br />2
<br />
<br />in.
<br />
<br />.
<br />
<br />Type
<br />
<br />Fire Resistance
<br />
<br />Details
<br />
<br />Ratings
<br />
<br />of
<br />
<br />Based on Standard Fire
<br />
<br />Construction
<br />
<br />Tests
<br />
<br />Rating
<br />
<br />.
<br />
<br />~
<br />
<br />e
<br />
<br />Type
<br />
<br />Fire
<br />
<br />WALLS
<br />Resistance
<br />
<br />Details of
<br />
<br />AND PARTITIONS-Continued
<br />Ratings Based on Standard Fire
<br />
<br />Construction
<br />
<br />Tests
<br />
<br />Rating
<br />
<br />FLOOR AND CEILING CONSTRUCTIONS-Continued
<br />
<br />FmE
<br />
<br />.STANCE
<br />
<br />RATINGS
<br />
<br />e
<br />
<br />e
<br />
<br />FIRE
<br />
<br />RESISTANCE tTINGS
<br />
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