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<br />e
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<br />FIRE RESISTANCE RATINGS
<br />
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<br />FIRE RESISTANCE
<br />
<br />BEAM, GIRDER AND TRUSS PROTECTIONS-Continued
<br />Fire Resistance Ratings Based on Standard Fire Tests
<br />
<br />.
<br />
<br />.~.
<br />
<br />.
<br />
<br />No.
<br />
<br />Testing Sta-
<br />
<br />Report
<br />
<br />Laboratories
<br />
<br />Fire
<br />
<br />University
<br />
<br />RATINGS
<br />
<br />C. E. Testing
<br />
<br />Columbia
<br />
<br />of
<br />
<br />at
<br />
<br />F.
<br />
<br />Rating
<br />
<br />Protection
<br />
<br />of
<br />
<br />Details
<br />
<br />Type
<br />
<br />Steel
<br />Beams,
<br />Girders
<br />and
<br />Trusses
<br />Protected
<br />by a
<br />CeilingJ
<br />
<br />p
<br />
<br />No,
<br />
<br />No.
<br />
<br />No.
<br />
<br />Report
<br />
<br />Report
<br />
<br />Report
<br />
<br />C. E. Testing Laboratories
<br />
<br />C. E. Testing Laboratories
<br />
<br />Laboratories
<br />
<br />of
<br />
<br />of
<br />
<br />of C. E. Testing
<br />
<br />F.
<br />
<br />F.
<br />
<br />4 hrs.
<br />
<br />few
<br />
<br />(25) Columbia University, Dept.
<br />F. W. 56, July, 1930 (unpublished).
<br />
<br />(26) "Fire Tests of Building Columns," a joint report of Underwriters'
<br />Laboratories, Inc., the Associated Factory Mutual Fire Insurance Companies and
<br />the National Bureau of Standards, 1920.
<br />
<br />No.
<br />
<br />nonstandard tests made prior to 1912.
<br />of C. E. Testing Laboratories Report
<br />
<br />(24)
<br />
<br />hrs.
<br />
<br />4
<br />
<br />Ceiling of 15/16 in. (measured from face of lath) U.L.
<br />listed cementitious mixture, on metal lath suspended
<br />beneath structural members and ducts. Lath sup-
<br />ported not less than 3~ in. below structural mem-
<br />bers. Duct openings not to exceed 113 sq. in. in
<br />each 100 sq. ft. of ceiling area. Damper protection
<br />and other details as specified in U.L. listingc, under
<br />Floor or Roof, and Ceiling Constructions-Design
<br />No. 12-4 HR (Beam 4 HR)
<br />
<br />~ .~
<br />I
<br />
<br />4 hrs,
<br />
<br />4 hrs.
<br />
<br />4 hrs.
<br />
<br />Ceiling of ~ in. (measured from face of lath) gypsum-
<br />perlite plaster on metal lath suspended beneath struc-
<br />tural members and ducts. Lath supported not less
<br />than 2~ in. below structural members. Duct open-
<br />ings not to exceed 70 sq. in. in each 100 sq. ft. of
<br />ceiling area. Plaster mix: scratch coat 2 cu. ft. and
<br />brown coat 3 cu. ft. U.L. listed perlite to 100 Ibs.
<br />fibered gypsum. Damper protection and other de-
<br />tails as specified in U.L. listingc, under Floor or
<br />Roof, and Ceiling Censtructions-Design No. 8-3
<br />HR (Beam 4 HR)
<br />
<br />Ceiling of ~ in. (measured from face of lath) gypsum.
<br />perlite plaster, on metal lath suspended beneath struc-
<br />tural members and ducts. Lath supported not less
<br />than 3~ in. below structural members. Duct open-
<br />ings not to exceed 70 sq. in. in each 100 sq. ft. of
<br />ceiling area; not more than one electrical outlet in
<br />each 90 sq. ft. of ceiling, area. Plaster mix: scratch
<br />coat 2 cu. ft. and brown coat 3 cu. ft. U.L. listed
<br />perlite to 100 Ibs. fibered gypsum. Damper protec-
<br />tion, duct locations and other detail!! as specified in
<br />U.L. listingc, under Floor or Roof, and Ceiling Con-
<br />structions-Design No. 5-4 HR.
<br />
<br />.
<br />
<br />(27) "Fire Resistance of Concrete Columns," National Bureau of Standards
<br />Technologic Paper No. 272, 1925.
<br />
<br />(28) "Fire Tests of Columns Protected with Gypsum," National Bureau of
<br />Standards Research Paper No. RP563, 1933.
<br />
<br />(29) "Fire Test of a Building Column," National Bureau of Standards
<br />Technical News Bulletin No. 246, Oct., 1937.
<br />
<br />(30) Ohio State University Research Foundation Report No. 38, July, 1945
<br />(unpublished). Abstract of report published in reference (42).
<br />
<br />(31) "Fire Resistance of Heavy Timber Construction," National Bureau of
<br />Standards Technical News Bulletin No. 349, May, 1946.
<br />
<br />(32) Report of Committee on Tests Re: Cal. No. 163-46 SM, Bulletin of
<br />the Board of Standards and Appeals of the City of New York, Dec. 17, 1946.
<br />
<br />(33) "Fire-Resistance and Sound-Insulation Ratings for Walls, Partitions
<br />and Floors," National Bureau of Standards Technical Report on Building Mate-
<br />rials TRBM-44, June 24, 1946.
<br />
<br />Panel No.4 by Ray-
<br />California, Oct. 1945
<br />
<br />(34) Fire Test of Three-inch Precast Gypsum Wall
<br />mond E. Davis, Consulting Engineer, University of
<br />(unpublished). .
<br />
<br />o
<br />
<br />(35) Fire Tests of Precast Gypsum Wall Panels, by Raymond E. Davis,
<br />Consulting Engineer, University of California, Oct. 17, 1945 (unpublished).
<br />
<br />(36) "Chemical Treatment Increases Fire Resistance 'Of . Wood," National
<br />Bureau of Standards Technical News Bulletin No. 352, Aug., 1946.
<br />
<br />(37) Ohio State University Engineering Experiment Station Report Project
<br />No. T-1l8, Mar. 10, 1947 (unpublished).
<br />
<br />test data obtained
<br />
<br />(:,:~
<br />
<br />recognized
<br />
<br />of recognized
<br />
<br />Columbia University, Dept.
<br />May, 1926 (unpublished).
<br />
<br />Report of Test Conducted
<br />15-18, 1913 (unpublished).
<br />
<br />Columbia University, Dept.
<br />Dec., 1922 (unpublished).
<br />
<br />Columbia University, Dept.
<br />Dec., 1931 (unpublished).
<br />
<br />(22) Columbia University, Dept.,
<br />F. W. 73, Jan., 1933 (unpublished).
<br />
<br />(23) No known tests of brick arch floor construction, but such construction
<br />has been recognized for many years as satisfactory for buildings of fire-resistive
<br />construction.
<br />
<br />Based on a
<br />
<br />(18)
<br />W.30,
<br />(19)
<br />tion Aug.
<br />(20)
<br />W.20,
<br />(21)
<br />W.67,
<br />
<br />Ceiling of % in. (measured from face of lath) gypsum-
<br />vermiculite plaster covered with ~ in. vermiculite
<br />acoustical plastic, 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
<br />2 to 2~ cu. ft. and brown coat 3 to 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. 4-4 HR.
<br />
<br />Ceiling of 1~ in. (measured from face of lath) U.L.
<br />listed sprayed fiber on metal lath, and ~ in. sprayed
<br />fiber applied directly to structural members, with at
<br />least l~ in. air space between lath and ~ in. pro-
<br />tection. Steel members to project not more than 7 in.
<br />below ceiling surface. Other details as specified in
<br />U.L. listingc, under Floor or Roof, and Ceiling Con-
<br />structions-Design No. 4-3 HR (Beam 4 HR). ........
<br />
<br />of
<br />
<br />report
<br />
<br />report
<br />
<br />from unpublished
<br />
<br />from unpublished
<br />
<br />obtained
<br />
<br />data
<br />
<br />test
<br />
<br />(38) Based on
<br />testing laboratory,
<br />
<br />(39) Based on
<br />testing laboratory,
<br />
<br />page 47.
<br />
<br />Letter superscripts refer to notes,
<br />
<br />Project
<br />
<br />Station Report
<br />
<br />(40) Ohio State University Engineering Experiment
<br />No. T-129, Jan. 24, 1948 (unpublished).
<br />
<br />'I
<br />
<br />.
<br />
<br />e
<br />
<br />Project
<br />
<br />Products
<br />
<br />Station Report
<br />
<br />Clay
<br />
<br />Structural
<br />
<br />(41) Ohio State University Engineering Experiment
<br />No. T-1l8, March, 1948 (unpublished).
<br />of Structural
<br />
<br />Tile,
<br />
<br />Facing
<br />
<br />so
<br />
<br />Fire Resistance
<br />August, 1948.
<br />
<br />(42)
<br />Institute,
<br />
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