Document 15D2K69Jk4yK8YO4mnQZ40ax5

436 CHAPTER 24 1965: Guide And Data Boole Table 11-------Coefficients of Transmission (U) of Frame Construction Ceilings and Floors- CaeSkieeft o~ la filv per 0~e) |^m fcotj d.?m. brfra. th* tm oa ib two ddn) end ,, on sfffl > loo wtmfl cootfih'ooj on bo& tides Mowpw rioor e > ExampU of Substitution Resistance* used are given below in this table or in Table 8 or 4 Heated room below imheated space Construction . Resistance (R) (Heat flow up) Resistances used are given below in this table or in Table 8 or 4 Assume heated room is above unheated space so beat flow is down . Total resistance....................................... 1. Top surface (still-air)..:................................ 2. Linoleum or tile (av. R) 3. Felt...................... . , 4. Plywood (X in.)................ 5. Wood subfloor (*><sin.) .. 0.61 0.05 0.06 0.78 0.98 Deduct 1. Top surface (heat flow up). .. 0.61 6. Air space (heat flow up)........ 0.85 8. Bottom surface (heat flow up)................................................ 0.61 6. Air space6 (7W in.)............. 0.85 Difference........................................................ 7. Metal lath ana X in. plas. at. wt. agg.) 8. Bottom surface (still air) 0.47. Add l. Top surface (heat flow down) ... 0.9t 0.81 6. Air space (heat flow down)........ 1.85 4-41 8.07 8.Si = = -........... ::::::: oTotal resistance....................... i it v i/R 1/4.41 .23 See value 0.23 in boldface type in table below. 8. Bottom surface (heat flow down) 0.98 3.09 Total resistance......................................................... 6.43 U - l/R - 1/545 - 0.18 Design Heat Transmission Coefficients 437 Toble !2A____ Coefficients of Transmission [U) of Concrete Roor-Ceiling Constructions* (Winter Conditions, Upward Flow) '--** CoelBaeon mi--<) in Bio oor (boar) (iqvart fool )frjfcrenfie<f cfagree difference in fempervturm between the air on tfie two rides). ^ poj m begad on ttiB air (no wind) conditions on boA ode* Example of Subtfifufron Resistances used are given below in this table or in Table 3 or 4 Heated room below unheated space Construction (heat flow up) Resistance (R) 1. Top surface (still air):...................... .. 0.61 2. Asphalt tile and felt............................ 3. Plywood (X in.)................................... 4. Air space*................................................ 5. Concrete slab 4 in. (av. R)............... .. 0.11 .. 0.78 .. 0.85 .. 0.40 6. Air space6 (8 in.).................................. .. 0.85 7. Metal lath and X plas* (sand agg.) .. 0.13 8. Bottom surface (still air).................. .: 0.61 Total resistance.................................. .. 4-34 U - l/R - 1/4-34 ".............. * 0.23 See value 0.23 in bold face type m table below. Resistances used are given below in this table or tn Table S or 4 Replace items 2, 3, and 4 with hard wood block in.) on slab Total resistance............................. Deduct 2. Asphalt tile and felt. 3. Plywood (X in.). . 4. Air space................. 0.11 0.78 0.85 Difference.................................... Add 2. Wood block (lH in.). Total resistance.... V - l/R - 1/3.84 = AM 1.74 8.84 0.30 , AJja, U Vduer far Cmidmcffa" Adrfa) Imdrtirm m Air Spot. ebe- faiprofarf Crinq, fa. TcM. It Type of Cetfag Type el Deek Type of finish Root Number Concrete4 (sand' agg.) (4 in.) 0.88 (6 in.) 0.48 Floor tile* or linoleum . (Hin-)...................... Wood block (lMe in*) OD slab.-............................ Floor on sleepers Plywood subfloor (X in.), felt and floor tile* or linoleum (X in).............................. Wood subfloor (*Mi hard- Floor tile* or linoleum (X in.)........................ Concrete4 (sand H8-) (8m.) (10 in.) 0.64\ - -J Wood block OKe in.) on slab............................... Flooron sleepers Plywood subfloor (X in.), felt and floor tile* or linoleum (X in.)............................... Wood subfloor (*M* in.), felt and hardwood (X in.). * Seo text eeetioo Cattailtins Overall Coefficients for beam of calculations. Toadjust V values tor tbo efioct at added insulation between framing members. wTable 16. * Table It am be used only if iteeper ipeee is noo-reflective. Tbe sleeper air speee is not to be coanted in mine Table 16. Canente a uenmed to have e thermal conductivity k at 1J.0 as given in Table 4. * Includes asphalt, rubber, and plsstie tQe Qt in.), tOe on lonuo (1 in.).