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Letter superscripts refer to notes, 24 33 Type Steel Unitsu, Cellular l~ in. concrete plus ~ in. cement mortar finish, on top of cellular steel units. Ceiling of 1 in. unsanded wood. fibered gypsum plaster on metal lath secured not less than 9 in. below bottom of cellular steel units. (9) "",. 1~ in. concrete plus ~ in. cement mortar finish, on top of cellular steel units. Ceiling of 1 in. unsanded wood- fibered gypsum plaster on metal lath secured not less than 2 in. below bottom of cellular steel units. (9) 2 in. (minimum thickness over cells) concrete on top of U.L. listed cellular steel floor units. Ceiling of ~ in. (measured from face of lath) gypsum-perlite plaster on metal lath suspended not less than 14~ in. from underside of floor units, and spaced at least 2~ in. below steel beams. Lath attached to ~ or 1 in. furring channels spaced 12 in. on centers, which are attached to 1~ in. runner channels spaced 48 in. on centers. Plaster mix: scratch coat 2 cu. ft. and brown coat 3 cu. ft. D.L. listed perlite to 100 Ibs. fibered gypsum. Duct opening in ceiling not to exceed 70 sq. in. in each 100 sq. ft. ceiling area, protected by fire damper of No. 12 USS gauge steel covered each side with 1/16 in. thick layer of asbestos paper. Also No. 12 USS gauge steel fire damper at junc- tion between branch duct and main duct, Duct loca- tion and other details as specified in D.L. listingc, under Floor or Roof, and Ceiling Constructions- Design No. 8-3 HR. .......................................................... 2 in. (minimum thickness over cells) concrete on top of U.L. listed cellular steel floor units. Ceiling of ~ in. gypsum-vermiculite plaster on metal lath. Face of lath supported not less than 15~ in. from under- side of floor units. Plaster mix: scratch coat 2 to 20 cu. ft. and brown coat 3 to 30 cu. ft. vermiculite to 100 Ibs. fibered gypsum. Duct opening in ceiling not larger than 85 sq. in. in each 100 sq. ft. ceiling area, and protected by No. 14 USS gauge fire damper. Not more than one electrical outlet in each 90 sq. ft. of ceiling area. Duct location and other details as specified in D.L. listingc, under Floor or Roof, and Ceiling Constructions-Design No. 1-3 HR. .....,.......'" 2 in. (minimum thickness over cells) concrete on top of U.L. listed cellular steel floor units. Ceiling of 1 in. U.L. listed sprayed fiber on face of adhesive coated metal lath. Lath supported not less than 40 in. from underside of steel floor units. Other de- tails as specified in U.L. listingc, under Floor or Roof, and Ceiling Constructions-Design No. 2-3 HR. 2~ in. (minimum thickness over cells) concrete on top of U.L. listed cellular steel floor units. Ceiling of 10 in. (minimum thickness) U.L. listed sprayed fiber applied directly to underside of adhesive coated cellular steel units. Other details as specified in U.L. listingc, under Floor or Roof, and Ceiling Constructions- Design No. 3-3 HR page 47. 3 hrs. .' . ~ The minimum face shell for the largest core hole at the thinnest point (this may be the average of the two face shells in the same core). The end and internal webs in each core hole to be measured at the thinnest point. 47. Letter superscripts refer to notes, page 3 hrs. * N onbearing. framed into wall. 3 hrs. .j .~ , 'l I Concrete Masonry Units (8 or 12 in. units) t Rated as load bearing Natural, by-product, and proc- essed, except those listed be- low. (96) ,....,..........,...,.......,'........ Burned clay or shale. (96) Expanded slag. (96) Pumice. (96) with noncombustible 1~ 1~ 1~ 1 1 1 10 1~ 1~ or 1 1 1 ;10 members 2~ 1~ 1~ 1 1 1~ Type Type of Aggregate 2 hrs. t Face- Shell Web 3 hrs. t Face- Shell Web 4 hrs.t Face- Shell Web 3 hrs. I 'i Minimum Face Shell and Web Thicknesses, Inches.1 8 or 12 in. D.L. listed concrete blocks with combustible members framed in wall; laid as specified in U.L. listingc, under Walls and Partitions-Design No. 1-4 HR or No. 1-3 HR or No. 1-2 HR. ,....."""...,.", 1 hr. 8 or 12 in. U.L. listed concrete blocks with combustible members framed in wall, and plastered on face opposite framing with * in. portland cement stucco or gypsum plaster; laid as specified in U.L. Iistingc, under Walls and Partitions-Design No. 1-4 HR, No. 1-3 HR, or No. 1-2 HR 1~ hrs. 8 or 12 in. D.L. listed concrete blocks, laid as specified in U.L. Iistingc, under Walls and Partitions-Design No. 1-2 HR 2 hrs.t 3 hrs. 4 hrs. Concrete Masonry Units 6 in. U.L. listed concrete blocks; cells and spaces com- pletely filled with fluid mortar mix and construction reinforced with 0 in. deformed steel spaced 24 in. on centers horizontally and vertically. Mortar mix: 5 cu. ft. pumice aggregate and 1 cu. ft. of cement. Other details as specified in U.L. listingc under Walls and Partitions-Design No. 8-4HR ,.....,......................... 4 in. U.L. listed concrete blocks; cells filled with perlite mortar and laid as specified in U.L. listingc, under Walls and Partitions-Design No. 2-4 HR. ..............., 8 or 12 in. D.L. listed concrete blocks, laid as specified in U.L. Iistingc, under Walls and Partitions-Design No. 1-3 HR 3 hrs.t 4 4 hrs.t hrs.* . Details of Fire Resistance Ratings Based on Standard Fire Tests Construction RatiDl . '! e Type Fire WALLS Resistance Details AND PARTITIONS-Continued Standard Fire Ratings of Based Construction on Tests Rating FLOOR AND CEILING CONSTRUCTIONS-Continued - FIRE RESISTANCE RATINGS e e FIRE RESISTANCEtTINGS