Document gaOwDVmnb0ZxO1bOgj6rbE2JJ

164 CHAPTER 12 1960 Guide Col. 1 Table 1.... Winter Gimafic Conditions--United States* (Continued) Col. 2 Co1. S Co1.4 Col. 5 Col. 6 Col. 7 Col 8 Cot. 9 State Snvotioo* Ft. Design Winter Temperatures- -f FreqvertCf of Recurrence, Years Once m 40 Gncv in 20 Ossa in 13 Once In 5 Arp Wind Spaed, Doc, Jen, Feb4 Mpti N. J........................ Somerville.................................. C Trenton........................................ C N. M..................... Roswell. .*.................................. A Santa Fe......................................C N. Y...................... Binghamton................................C Buffalo......................................... A Canton..........................................C Ithaca........................................... C New York................................... C Oswego......................................... C Rochester.................................... A Syracuse.......................................A N. C...................... Charlotte........... ..........................C Hatteras.......................................C Raleigh.........................................C Wilmington.................................C N. D...................... Devils Lake................................ C Grand Forks.............................. C Wtiliston...................................... C 75 144 3612 7045 915 693 458 888 425 363 543 424 ' 809 4 405 78 ' 1481 832 1919 4 -3 0 2 3 7 -4 0 % 3 7 8 -4 1 4 6 1], -2 1 3 4 7 -12 -11 -28 -9 X -12 -9 -16 -9 -7 -25 -6 3 -9 -6 -12 -7 --5 --S3 -4 6 -7 -4 -10 -6 -4 -21 -3 6 -5 -3 -8 -2 0 -17 0 9 -1 1 -4 9 12 14 16 19 16 19 21 22 25 9 12 14 16 18 16 19 SO 22 25 -37 -37 -44 -34 -34 -38 -33 -31 -36 -30 -30 -33 -27 -26 -27 10.5 10.9 7.1 7.0 6.8 17.1 10.5 11.3 16.8 12.1 9.6 11.2 7.3 14.3 7.9 9.4 10.1 13.2 8.6 Cleveland...................... .......... C Columbus.................................... C Dayton.........................................A 8andusky.....................................C Toledo.......................................... A 669 812 1002 60S 622 -11 -7 -5 -3 -9 -5 -3 -2 -10 -6 -4 -2 -10 -6 -4 -2 -11 -7 -5 -4 1 2 2 2 0 14.7 11.6 11.1 11.0 12.1 Portland...................................... C Roseburg..................................... C Pa........................... Harrisburg.................... ...........APhiladelphia...............................C Pittsburgh................ .............C Reading....................... ............ C Scranton..................................... C R. I........................ Kingston......................................C Providence.................... ..............C S. C....................... Columbia..................................... C S. D....................... Pierre......................................... A Rapid City.................................A Knoxville.....................................A Memphis...................................... C Nashville............ ........................C Tex........................ Amarillo.......................................A Corpus Christi...........................A Dallas...........................................A 98 523 335 18 929 311 877 100 77 401 1718 3165 950 348 714 3590 40 487 1 7 10 12 18 14 17 19 20 24 024 5 1467 -9 -6 -3 -2 -2 1 3 4 -8 -4 -8 -1 8 U 2 8 3 -5 -2 0 1 4 -4 -1 1 2 5 14 17 19 20 24 -28 -28 -25 -24 -S3 -S3 -21 -20 -17 -16 -3 2 5 7 12 0 4 6 8 13 -4 0 8 5 10 -10 -5 -3 0 5 16 20 83 24 29 1 6 8 10 15 7.3 3.9 7.6 11.0 11.8 9.0 7.6 11.7 12.1 8.0 11.7 8.0 7.2 9.3 9.8 12.1 11.0 10.6 Heating load Col. 1 Skde Table 1.... Winter Climatic Conditions--United States* (Concluded) Col. 2 Cd. 3 Col. 4 C.5 Col. 6 Cd. 7 Cd. S Station* Devotion* ft. Fort Worth................................ C Galveston....................................C Houston............... .......................C Palestine......................................C San Antonio..............................A Taylor.......................................... C 5920 708 128 198 555 782 570 Design Winter Temperature*'--F Freqweticy of Recurrence, Years Once at 40 Once in 20 Once in 13 Once m 10 One* in S so 0 5 8 10 15 16 20 S3 24 29 13 17 19 21 25 4 8 a 13 18 12 16 19 20 25 5 9 13 14 19 165 Cd. 9 Avg Wind Speed, Dee, Jan, Arfj4 Mph 10.5 11.2 10.5 8.0 8.3 9.8 331 -23 -19 -11 Northfield................................... C 840 -24 -21 -19 -IT -13 8.8 Lynchburg.................................. A Norfolk...... ..................................C Richmond......... ..........................C Wytheville..................................C 947 91 180 2400 7 10 a 12 15 11 14 15 17 20 6 9 a 12 16 -3 1 3 4 8 8.1 12.1 8.1 7.3 Spokane.......................................A Tacoma........................................ C Tatoosh Island......................,.C Walla Walla................................C 2357 279 110 949 -28 9 12 -23 -20 13 16 -16 -16 16 18 -12 -13 16 20 -8 -5 20 25 -1 6.2 8.0 18.9 5.3 Parkersburg............................... C Wis........................ Green Bav.......... .....................C 1a Crosse.................................... C Madison...................................... C Milwaukee.................................. C 685 598 725 1008 744 -7 -27 -27 -25 -24 -3 -23 -23 -21 -20 -1 -20 -SO -19 -17 1 -18 -19 -17 -15 5 -14 -14 -13 -10 7.2 10.5 9.3 10.1 12.1 Lander......................................... A Yellowstone Pork.................... C 5569 6239 -39 -45 -33 -38 -30 -34 -27 -30 -21 -23 3.9 8.8 Notes for Table 1 * Date compiled from IT. S. Weather Bureau records by H. C. S. Thom. * Col. 2. The stations followed by letter A are airport stations; ail others are city office stations aod are followed by the letter C. * Col. 3- Elevations marked c are ground elevations at stations. Ail other elevations given are the actual elevations of the ther mometer bulb above mean sea level. d Wind speeds are from tJ< K Weather Bureau records for the period ending February 1948. _ * The winter design temperatures shown in Columns 4-8 inclusive for U. S. cities are minimum average daily temperatures that will recur with a probable frequency of once in the number ofyears shown at the head of the column based on the U. S. Weather Bureau records for the 30-year period between 1921 and 1950. For example, the temperatures in Column 6 will recur once every 13 years as minimum average daily values, the temperatures in Column 7, once every 10 years, etc. Tables 1 or 2, a heating engineer should consider each of the following factors: 1. Is heat capacity of structure high or low? 2. Is structure insulated? 3. Is structure exposed to high wind? 4. Is the ventilation or infiltration load high? 5. Is there more glass area than normal in the structure? 6. During what part of the day will it be used? 7. What is the nature of occupancy? 8. Will there be long periods of operation at reduced indoor temperature? 9. What is the amplitude between maximum and minimum daily temperature in the locality? 10. Are there local conditions which cause significant varia tion from temperatures reported by Weather Bureau? H. What auxiliary heating devices will there be in the build ing? 12. What is the expected cost of fuel or energy? For the usual structure under typical conditions the ASHAE Technical Advisory Committee on Heating and Air Conditioning Loads recommends that the design tempera- . tures in Column 6 be used for U. S. cities. The U. S. Weather ' Bureau data show that an average daily temperature lower than that shown in Column 6 will occur with a probability of once in 13 years. If a careful study of preceding factors 1 to 12 shows that the indoor temperature of tire structure in question will re spond more quickly than normal to extreme outdoor tem peratures that persist for less than twelve hours, then de sign temperatures from Columns 7 or 8 may be used. On the other hand, if the structure is less responsive than normal to changes in outdoor temperature, outdoor design tempera tures from Columns 5 or 4 may be selected. The designer must keep in mind, before reaching a final