Document 960dz8pNeJqJJYB9XNQLJKo3

114 CHAPTER 9 1959 Guide Table I3A .... Coefficient* of Transmission (LI) of Bat Masonry Roofs with Built-up Roofing, with and without Suspended Ceilings* (Winter Conditions, Upward Row) Him* Coefficients are expressed in Bln per (hour) (square toot) (Fofuarriert degree difference hi temperature between the air on the two ______________________________________tided, and ore based on an otrtotis wind velocity of 15 mph______________________________________ Example--K 4 - Example at Substitution Resistances used are given below in this table or in Table S or 4 Construction (heat flow up) Resistance (A) 1. Outside surface (15 mphwind)................. 0.17 2. Built-up-roofing--H in......................................... 0.55 3. Roof insulation (none)......................................... -- 4. Concrete slab (It. wt. agg.)(2 in.).................... 8.88 5. Corrugated metal..................... ........................... 0 6. Airspace*.......................................... 0.85 7. Metal lath and K in. plas. (It. wt. agg.)___ 0.47 8. Inside surface (still air)...................................... 0.61 Resistances used ore given below in this table or in Table 5 or 4 Replace item 4 with 4 in. concrete slab (gravel agg.) and roof insulation (C -- 0.36) on top of slab. Total resistance.............................................. 4.65 Deduct 4. Concrete slab (It. wt. agg.) (2 in.).............. 8.88 Difference...................................................... ............ 8.48 Add 3. Roof insulation (C =* 0.36).... . 8.78 4. Concrete slab (gravel agg.) 4 in. 0.44 8.88 e3456 T6 Total resistance.:.................................................. 4.65 Total resistance.............................................................5.65 U - 1/R - 1/4-65 *=............................................ 0.22 U - 1/R - 1/5.65 -................................................ 0.18 See value 0.22 in boldface type in table below. To Adjust U Vakres far Construction with Added Insulation in AJr Spoce, See Table 16 Type at Ceding Boot Iraufation No Ceding Suspended Celling* C value of roof insulation Gypsum bd. (K m.) and pigs. Metal lads and pla: Acoustical file On furring On gypsum bd. channels (?j 0 *;*! 0.64 Material Concrete sl&bd Gravel agg. (4 in,).. 0.55 (6 in.).. 0-48 (8 in.).. 0.64 Lt. wt. agg.* (2 in.).. 8.88 (3 in.).. 5.55 (4 in.).. 4-44 Temporary.................. Temporary.................. Temporary.................. 0.70 0.63 0.57 0.24 0.18 0.15 0.12 0.23(0.17 0.15 0.12 0.14 0.12 0.34 Corrugated metal*... 0.21 -Insulation bd. (1 in.) 5.78 0.13 Insulation bd. (1)4 in )--- 4-17 I3i0.ll Glass fiber bd. (1 in.) 4-00 0.11 Corrugated metal*... 0 0:17 Insulation bd. (1 in.) 8.78 0.12 Insulation bd. (IK in 4.170. 0.10 Glass fiber bd. (1 in.) 4.00` 120.10 Corrugated metal*... 0 180.140 120.1 Insulation bd. (i in.) 8.78 120.100. KM Insulation bd. (IK in 4-17 0. 100.090. Glass fiber bd. (1 in.) 4.00- 10 0.06 0. 0.12 0.10 0.220. 0." 0 " 0.140. 0.08 0.07 0.12 0. 0.0 0.07 0.120. 0.10 0. 0.1SO. 0." 0.0710. 0.120. 0.07 0.07 0.100. 0.07 0.07 06 0.10 0.' 0.07 0.150 0.07 0.06 0.11 0.07 "10,i 0.07 0.09 0.35 0.33 0.14 0.11 0.12 0.18 0.12 0.10 0.10 0.15 to n 0.41 0.39 0.37 0.23 0.190.1 0.14 0.120.: 0.12 0.100. 0.12 0.111 0.18 0.151 0.12 0.111 0.10 0.091 0.11 0.101 0.15 0.131 0.11 0.101 0. 0.091 0.09 0.21 0.16 0.11 0.10 0.10 0.14 0.10 0.1 OJ 0.12 0.1" 0.1 o.< Gypsum stab* (2 in.).. 1.80 (3 in.).. /.Si (4 in.).. 5.40 Gypsum bd. (K >n.)........ 36 0.24 0. 0.12 0.1 0.18 Insulation bd. (1 in.)___ 20 0.15 0. 0.10 0.0710.1 0.12 Insulation bd. (IK in ) . 4-/7JO. 15 0.13 0. 0.07 0.1 0.11 Asbestos-cement bd.1 (K in.)............................. 0.06 0. 0.26 0. 1910.15 Glass fiber bd. (1 in.).. 4.00 0. 0.13 0. 10 0.09 0.07 0. 0.26 13 0.13 0.22 0. 0.20 0.18 0.120. 0.12 Gypsum bd. (K in.)........ 0.45 0.21 0. 13 0.09 0 22 0.21 0.19 0. 0.17 0.16 Insulation bd. (1 in.) 5.78 1210.10 Insulation bd. (IK in.).. 4-n I40.12i0. 10.0.09 Asbestos-cement bd. (Kin- 0.06 34 0.23,0. 17HD.14 0.07 0.14,0 14 0.14 0.06(0.12(0-12(0.12 0.12 0.22,0. 24 0.23 0.13 0. 120.120.12 0.11 0. top. up. 10 0.20 0. 180.190.17 Glass fiber bd. (1 id.)------ 4.00 140.120. 10.0.09u 12.0.120 120.12 0.110. 100.11 0.10 Gypsum bd. (K in.)........ 6.4510.25,0.19.0. 15.0.120. 190.180. 190.19 0.170. 15 0-16 Insulation bd. (1 in.)___ -------- 160.130. 110. 10.0. v^v.w.cv. 13 0.13,0 130.130 0.120. 110-12 Insulation bd. (IK in.) . 130.118. 100. G8|0.08,0.07,0.06 ,110.110 11.0.110 0.100.09 Asbestos-cement bd. (K in.)..................................... 0.06 0.528 0.20 0. 160.13 0 li;0.100.08 0 2ljo.200 21,0.200. 220.180. 16 0.17 0! 15 29 Glass fiber bd. (1 in.)___ 4.000.1130:110 100.090. 080.07i0.060 12.0.1110 lilo.ulo 1210. iok 100.100.10 30 * 8m text section Overall Coefficient* for besis of calculations * To adjust U value* for the effect at added insulation between framing member*. *ee Table IS. * V values would also apply if slab were poored on metal lath, paper-hacked wire, fabric, or asbestos-cement b * Concrete assumed to have a thermal conductivity k at 110 and a density of M0 lb per eu ft. * Concrete aauiaed to have a thermal conductivity i of Q-S0 and a density of 301b per eu ft. 1 Gypsum slab 1H in- thick rinee this is recommended practice. * Gypsum fiber oooowte with 12H percent wood chips (thermal conductivity k -- 1.66). * See Table 18 G for U value of roof and construction with roof insulation added to roof deck. Heat Transmission Coefficients of Building Materials 115 Table 138 . -- Coefficient of Transmission (U) of Flat Masonry Roofs with Built-up Roofing with and without Suspended Ceiling* (Summer Conditions, Downward Row) These coefficients are expressed in Bfu per (hour) (square foot) (Fahrenheit degree difference to temperature between the afr on the two sides), and are based on on outride wind vefooty of 7.5 mph______________________________________ ExcnpIsHlMf I' 2 Resistances used are given below in this table or in Table 8 or 4 Construction (heat flow down) Resistance (R) 1. Outside surface (7.5 mph wind)........................ 0.85 2. Built-up roofing (K'iu.)...................................... 0.55 3. Roof insulation (none).......................................... 0.00 4. Concrete slab (gravel agg.) (6in.).................. 0.48 5. Temporary form bd............................................... 0.00 6. Air space* (8 in.).................... 1.85 7. Gypsum lath (K in-) and K in. plas. (It. wt. agg)...............................................................................0.64 8. Inside surface (still air)....................................... 0.98 Total resistance.............. 5.87 U - 1/R - 1/5.87 *........................................... 0.26 See value 0-26 in boldface type in table below Exomple of Substitution Resistances used are given below in this table or in Table. 8 or 4 Replace item 3 with roof insulation (C "x 0.36) and remove suspended ceiling Total resistance.............................................. Deduct 6. Air space...................................... 1.85 7. Gypsum lath (K in.) and K in. plas. (lt. wt. agg.).................... 0.64 5.87 1-.8i Difference................................................ Add 3. Roof insulation (C " 0.36).. 1.98 8.78 Total resistance ".. U - 1/fi =. 1/4.76 = 4-76 0.21 To adjust U VcfuM for Conduction with Addad fnsufation to Air Specs, So* Table 16 Molwrial Concrete slab*1 (Gravel agg.) (4 in.).. 0.55 (6 in.).. 0.48 (8 in.).. 0.64 Lt wt. agg.* (2 in.).. 5.55 (3 in.).. 5.55 (4 in.).. 4-44 Gypsum slab* (2 in.).. 1.80 Temporary. Temporary. Temporary. Corrugated metal*............ Insulation bd. (1 in.)... Insulation bd. (IK in.) . Glass fiber bd. (1 in.)... Corrugated metal*............ Insulation bd. (1 in.)... Insulation bd. OK in.) . Glass fiber bd- (1 in.)... Corrugated metal*............ Insulation bd. (1 in.) ... Insulation bd. (IK in ) Glass fiber bd. XI in.)... Gypsum bd. (K in.)____ Insulation bd. (1 in.)... Insulation bd. (IK in.). Asbestos-cement bd.' (K (3 in.).. 1.80 Glass fiber bd. (1 in.).. Gypsum bd. (K in.)... Insulation bd. (1 in.).. Insulation bd. (IK in.) Asbestos-cement bd. (fa (4 in.).. 8.40 in.)........................................ Glass fiber bd. (1 in.)... Gypsum bd. (K in.)____ Insulation bd. (1 in.)... Insulation bd. OK in.). Asbestos-cement bd.* (K in.)................................... Glass fiber-bd. (1 in.) 6m text section Calculating Overall Coefficients for basis of -- " To adjust U value* tor the effect of added insulation betwaen framing members, see Table 16. * V values would slso apply if slab were poured on metal lath, paper-backs* wire fabric, w aabeatM-cement b Omereta assumed ti> have a thermal conductivity k of 12.0 and a density of M0 lb per cu ft. * Concrete assumed to have a thermal conductivity k of 0.50 and a density of 30 lb per eu ft. Gypsum slab iH is. thick since this is racommea&d practice. * Gypsum fiber concrete with 12V4 percent wood chips (thermal conductivity k -- 1.68). . 5* Table 16 E for U value at roof and ceiling conetraction with roof insulation added to roof deck. saasasu sss ssaaa aassa as