Document V3ngx3Y6yjwKRr1Zvz2Y89JXj

: i. '!; s f; :i ' i t: <`{ ji I; i l) '< \ 196 CHAPTER 9 1952 Guide Table 18. Combined Coefficients of Transmission (U) of Pitched Roofs* and Horizontal Ceilings--Based on Ceiling Area* Coefficients are expressed in Btu per (hqur) (square foot of eeUing area) (Fahrenheit degree difference in temperature between the air on the two sides), and are based on an 'outside trind velocilp of 16 mph. TYPB or ROOFING AND BOOT 8HEATHIN0 CEUNO COEFFl- CIENT/ (Fsott TABLE 13) Woos Rbtmw ob Wood Baaed Avatar 8hbigi*p on Bou Roattso ON WOOD BBHATBOT* No float " fiwnbitfan . (Raften Emceed) (U.-OAS) Mlnlan* . nans Board : of Baften (Ur- 02 1 In. Insu lating Board on Under Side of Baftoa (Ur - 0.16) NoBoqf Insolation (Baften Exposed) (Ur - 053) Uln. Insu lating Board on Under Side of Baften (Ur- 033) 1 In. Insu lating Beard on Under Side of Baften We- 0.17) Z A B c D 'E F <uo on 019 019 0J4 0085 - -0099 npoO Oil Oil > 0078 s- .0978 0989 0987 0981 0966 097 0974 0978 aosi 0987 0994 040 041 041 ; 0974 0979 0983 . nrtftx 0993 0967 ' 0971 0975 0979 0983. 19 20 21 n 23 019 019 0996 , oom 019 .0997 0986 84 016 018 040 0987 043 040 0989- 25 017 013 040 0990 048 . 040 . 0999 28 018 014 Oil v 0993 044 041 0993 27 019 014 on 0095 045 on 0998 28 020 sson on 035 - 096 097 098 029 015 041 ' 0998 015 048-- 040 016 049 . 010 016 048 040 017 = 013 021 045 016 047 ; 047 018 017 \ oji 1 Oil 018. 018 013 OJl 049 018 ' 013 041 049 019 014 0.19 049 oj# 014 049 1 020 019 049 019 019 019 048 048 043 044 014 040 040 on 041 OJl 29 30 31 32 33 (Ml 34 041 35 on 38 049 if 019 88 080 084 086 086 087 020 091 029 029 023 i 044 045 045 045 016 on 049 : 043 043 043 020 022 029 028 023 044 045 045 045 016 OJl 39 043 40 043 41 043 42 013 43 045 02S 047 043 046 017 044 44 069 099 ; 0J8 044 030 049 015 45 091 . 099 018 : 016 041 049 045 41 081 067 009 090 049 v 015 091 049 ` ; 046 091 049 : 015 091 093 093 049 045 47 090 ` 046 48 090 046 49 (See text on p. 184.) * Calculations,based on 4 pitch roof (n 12) using the, following formula: ,, Ur X Ut* U = combined coefficient -to be used with ceiling area.'.' . u --------- 77" Ur = coefficient of transmission of the roof. Ur -|------- Uce 'coefficient of transmission of the ceiling. n the ratio of the area of the roof to the area of the ceiling. Use cftfling area (not roof area) with these coefficients. e Coefficients in Columns D E and F may be used with sufficient accuracy for tile, slate and rigid as bestos shingles on wood sheeting. d Based on 1 x 4 in. strips spaced 2 in. apart. * Sheathing assumed 3$ in. thick. f Values;of Uce to be used in this column may be selected from Table 12. Heat Transmission Coefficients, of Building Materials 1-97 0Table 19. Coefficients of Transmission ) oeSolld Wood Doors... , Coefficients areexpreeeedinBluper (lour) (squarefoAf (Fahrenheit degree difference fn temperature between tne atr on the two sides), and are based upon an outside wind velocity of 16 tank. . Nominal Thickness -Inches Actual Thickness Inches - 7.* "StrosiD Dooa , . o>. ; . With Glass Stobm Doob* r. i u H H i* 1A - 0.69 ,0.59 0.52 0.51 ' 0.35 0.32 0.30 0.30 r: 2 li 2i 2* 3 2{ 0.46 0.38 : 0.33 0.28 0.25 > .0.23- . , ouwpuMM using C = lao tor wooa;/ \M,U " OB and 140 for air space. i be used for single exposed doors containing thin wood panels or single nance of glass, and 029 for the same with gift** storm doom .. ^ 8 50 percent glass and thin wood panels. 0Table 20. Coefficients of Transmission ) or Windows, Skylights and Glass Block Walls Coefficients are expressed in Btu per (hour) (square foot) (Fahrenheit degree difference in temperature between tie aw on the two sides), and are based upon the fallowing outdoor conditions: 0 F air temperature, ________________________________ dear skies, no eotar radiation Section A--Vbbrcal Glass Sheets Numbbb or 8hbzts One Two Three U......................... None 1.13 H 0.61 H 0.55 1* . HH 0.30 0.34 SECTION B--HOBIXONTAL GLASS Sheets (heat FLOV DP) Number or Sheets : One ,. : . Two Air Spaoe, inches.................... U.................... None 1.40 H 0.70 0.66 1* . 0.63 Sbctiom O-Walls or Hollow Glass Block Dkscbbtion 5f x M x 31 in. thick.... 7f x 7| x 3} in. thick___ 7| x 7| x 3t in. thick wwiiith glass fiber screen dividing tW cavity.. 0.60 0.56 0.48 Section D--Appboximatb Application Factobs roa Windows Mjjltzflt Flat Glass U Values bt These Factoas Siifole Glass Dotibli Glass* Windows with Percent^ Glass * actor 1B PeGr]caesnat^ : | PGh^ Factor Sheets.................. Metal Auh 100 1.00! ' 1 100 1.00 1 80 0.90 1 80 0.95 i 80 o'oo 60 0.80 I 60 .0.85 J . 60 0.60 80 I.00; I 80 -1.20 | 80 - 1.00* (See text p.187.) * For 1 in. or greater. Unit type double gl?ng (two lights or panes in same opening). . . . ,iZ * with U. values for two sheets with i in. air spaoe. Baaed on area of exposed portion of sash; does not include frame or portions of sash concealed by frame. For. metal storm sash or metal sash with attached storm pane.