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<br />6
<br />
<br />Ceiling of 1 in. (measured from face of lath) gypsum-
<br />perlite plaster on metal lath, with back plaster on
<br />ceiling lath to be not less than 1 in., and on beam
<br />1~ to 3 in., especially at corners. Lath supported
<br />so as to provide not less than 3 in. air space between
<br />lath and structural members. , Steel members to pro-
<br />ject not more than 8 in. below ceiling surface. Plaster
<br />mix: scratch and brown coat 2 to 3 cu. ft. U.L. listed
<br />nprlitp tn tOO Ih. fihprprl avn.l1m nth"r rlpt,,"_ ".
<br />;p~~ifiecr i;-U.L.-'li;ti~~~ ;~d~'=-'-Floo-;' "~-; R~~'Ca;j
<br />
<br />Ceiling Constructions-Design No. 3-4 HR.
<br />
<br />Letter refer to notes,
<br />
<br />superscripts
<br />
<br />page 47.
<br />
<br />4 hI'S.
<br />
<br />--
<br />
<br />-
<br />
<br />62-A-R3390-7
<br />62-B-R3390-5
<br />62-C-R3390
<br />62-D-R3390-6
<br />62-E-R3390-9
<br />G2-F-R3390-3
<br />
<br />51
<br />
<br />62-G-R3390-4
<br />62-H-R3390-8
<br />62- I -R3390-11
<br />62- J -R3390-12
<br />62-lC-R3390-13
<br />62- L- R3390-1 0
<br />62-~-R3390-15
<br />
<br />(46) Ohio State University Engineering Experiment Station Project T-118,
<br />Reports No. 31 and 32, March, 1950 (unpublished).
<br />
<br />(47) Ohio State University Engineering Experiment Station Project T-118.
<br />Reports No. 20 and 21, May, 1950 (unpublished).
<br />
<br />(48) Ohio State University Engineering Experiment Station Project T-118,
<br />Reports No. 23 and 24, November, 1949 (unpublished).
<br />
<br />(49) Based on test data obtained from unpublished report of recognized
<br />testing laboratory.
<br />
<br />(50) Based on test data obtained from unpublished report of recognized
<br />testing laboratory.
<br />
<br />(51) Based on test data obtained from unpublished report of recognized
<br />testing laboratory.
<br />
<br />(52) Based on test data obtained from unpublished report of recognized
<br />testing laboratory.
<br />
<br />(53) Based on test data obtained from unpublished report of recognized
<br />testing laboratory.
<br />
<br />(54) Report of Raymond E. Davis, Consulting Engineer University of
<br />California, Oct. 3, 1949 and Supplementary report Dee. 20, 1949 (unpublished).
<br />
<br />(55) Report of Raymond E. Davis, Consulting Engineer University of
<br />California, Jan. 23, 1948 (unpublished).
<br />
<br />(56) Based on test data obtained from unpublished report of recognized
<br />testing laboratory. '
<br />
<br />(57) Based on test data obtained from unpublished report of recognized
<br />testing laboratory.
<br />
<br />(58) Based on test data obtained from unpublished report of recognized
<br />testing laboratory.
<br />
<br />(59) "Fire Resistance of Structural Clay Tile Partitions," National Bureau
<br />of Standards Report BMS 113, 1948.
<br />
<br />(60) "Fire Resistance of Walls of Lightweight Aggregate Concrete ~asonry
<br />,Units," National Bureau of Standards Report B~S 117, 1950.
<br />
<br />Concrete
<br />
<br />Steel
<br />Beams,
<br />Girders
<br />and
<br />Trusses
<br />Protected
<br />by a
<br />Ceiling.S
<br />
<br />Ceiling of 1 in. (measured from face of lath) gypsum-
<br />vermiculite plaster, on metal lath supported so as to
<br />provide not less than 2~ in. air space between lath
<br />and structural members. Plaster mix: scratch coat 2
<br />to 2~ cu. ft. and brown coat 3 to 3~ cu. ft. of U.L.
<br />listed vermiculite to 100 Ibs. fibered gypsum. Other
<br />details as specified in U.L. Iistingc, under Floor or
<br />Roof, and Ceiling Constructions-Design No. 2-4 HR,
<br />or Design No. 7-4 HR
<br />
<br />4 hI'S.
<br />
<br />jll>
<br />
<br />~.
<br />
<br />Resistance of Walls of Gravel-Aggregate
<br />Bureau of Standards Report B~S 120, 1951.
<br />
<br />(62) Reports of Fire Tests of Reinforced Concrete Slab and
<br />Underwriters Laboratories, Inc.
<br />
<br />(61) "Fire
<br />Units," National
<br />
<br />Beam Floors,
<br />
<br />Masonry
<br />
<br />in. (measured from face of lath) gypsum-perlite
<br />plaster on metal lath. Plaster mix: scratch coat
<br />2 cu. ft. and brown coat 3 cu. ft. U.L. listed perlite
<br />to 100 Ibs. fibered gypsum. Other details as specified
<br />in U.L. listinge, .under Floor or Roof, and Ceiling
<br />Constructions-Design No. 3-1 HR (Beam 1 HR).
<br />
<br />1~ in. sprayed fiber on metal lath cage spaced at least
<br />3 in. from the bottom and 2 in. from edges of structural
<br />members. Other details as specified in U.L. listingc,
<br />under Floor or Roof, and Ceiling Constructions-
<br />Design No. 3-3 HR (Beam 1 HR)
<br />
<br />1
<br />
<br />1
<br />
<br />hr.
<br />
<br />hr.
<br />
<br />'.
<br />
<br />.""
<br />, I
<br />
<br />VII in. (measured from face of lath) gypsum vermiculite
<br />plaster on metal lath supported by metal hangars
<br />anchored in concrete pads over beams. Pl,aster mix:
<br />scratch coat 2 cu. ft. and brown coat 3 cu. ft. U.L.
<br />listed vermiculite to 100 Ibs. fibered gypsum. Other
<br />details as specified in U.L. listingc, under Floor or
<br />Roof, and Ceiling Constructions-Design No. 1-1~
<br />HR (Beam 1~ HR)
<br />
<br />1~ hr.
<br />
<br />in. (measured from face of lath) gypsum vermiculite
<br />plaster on metal lath supported by metal lath hangars.
<br />Plaster mix: scratch coat 2 cu. ft. and brown coat
<br />3 cu. ft. of U.L. listed vermiculite to 100 Ibs. of fibered
<br />gypsum. Other details as specified in U.L. Iistinge,
<br />under Floor or Roof, and Ceiling Constructions-
<br />Design No. 3-2 HR (Beam 2 HR)
<br />
<br />2 hI'S.
<br />
<br />Steel
<br />Beams,
<br />Girders
<br />and
<br />Trusses
<br />Individually
<br />Protected
<br />
<br />~ in. (measured from face of lath) gypsum-vermicu-
<br />lite plaster on metal lath. Plaster mix: scratch coat
<br />2 cu. ft. and brown coat 3 cu. ft. U.L. listed vermi-
<br />culite to 100 Ibs. fibered gypsum. Other details as
<br />specified in U.L. listingc, under Floor or Roof, and
<br />Ceiling Constructions-Design No. 7-3 HR (Beam
<br />2 HR)
<br />
<br />2 hI'S.
<br />
<br />(45) Ohio State University Engineering Experiment Station Project T-118,
<br />Reports No. 29 and 30, June, 1950 (unpublished). Test results in brief fonn pub-
<br />lished in Bulletin of the Board of Standards and Appeals of the City of New
<br />York, September 19, 1950.
<br />
<br />'~
<br />
<br />(44) Ohio State University Engineering Experiment Station Project No.
<br />T-118, Reports No. 25, 26 and 26A, June, 1950 (unpublished). Test results in
<br />brief form .published in Bulletin of the Board of Standards and Appeals of the
<br />City of New York, September 19, 1950.
<br />
<br />Type
<br />
<br />BEAM, GIRDER AND TRUSS PROTECTIONS-Continued
<br />Fire Resistance Ratings Based on Standard Fire Tests
<br />
<br />Details
<br />
<br />of
<br />
<br />Protection
<br />
<br />Rating
<br />
<br />Ie
<br />
<br />u
<br />
<br />.'
<br />
<br />(43) Based on a study of the results of standard fire tests, together with the
<br />results of nonstandard fire tests reported in "Tests of the Fire Resistance and
<br />Strength of Walls of Concrete Masonry Units," Portland Cement Association,
<br />January, 1934.
<br />
<br />e
<br />
<br />FIRE RESISTANCE
<br />
<br />RATINGS
<br />
<br />e
<br />
<br />e
<br />
<br />.
<br />
<br />FIRE RESISTANCE RATINGS
<br />
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