Document rB7EjBMxv3qaNQZLjO132o0ye

256 CHAPTER 12 1956 Guide Table 1. Winter Climatic Conditions*--(Concluded) COL. 1 Pbov. ov CanADA Col. 2 Station^ Col. 3 Ele va tion FT Col. 4 Period op A Record Col. 5 Low- E8T Temp. on Rec ORDd Col. 6 Aver- aoe An nual Min. Temp. F Col. 7 Col. 8 .Coi.. s Col. 10 CnL. 11 Winter Design Temp. 2H% 5% 10% F "F F F Avg. Wind Vet.. Mph Out.... P. E. I. Que.... Sask. y. t... North Bay........ ..A Ottawa.............. A Peterborough... ..C Sioux Lookout. . A Sudbury............ C Timmins........... c. Toronto............. ..c Toronto............. ..A Windsor............. ..A Charlottetown.. C Arvida.............. ..c Knob Lake....... ..A Mont Joli........... A Montreal........... .0 Montreal........... A Port Harrison.. <: Quebec City-- ..c Seven Islands.. A Sherbrooke....... c Three Rivers... . c Prince Albert... ..A Regina............... ..A Saskatoon-..... ..A Swift Current. . A Dawson............. ..c Whitehorse........ ..A 1210 339 648 1227 837 1100 379 578 637 74 375 1605 150 187 98 66 296 190 620 50 1414 1884 1645 2677 1062 2289* 1925-1950 1921-1950 1921-1950 1931-1950 1921-1950 1921-1950 1921-1950 1938-1950 1921-1950 1921-1950 1932-1950 1948-1950 1943-1950 1921-1950 1942-1950 1942-1950 1921-1950 1944-1950 1921-1950 1921-1950 1021-1950 1921-1950 1921-1950 1921-1950 1921-1950 1941-1950 -46 -38 -38 -50 -45 -55 -22 -24 -10 -23 -42 -59 -28 -29 -28 -49 -32 -43 -39 -43 -56 -54 -54 -54 -73 -62 -33 -26 -21 -39 -34 -7 -13 -2 -11 -31 -48 -16 -20 -42 -19 -24 -24 -46 -39 -41 -34 -54 -51 -24 -18 -15 -38 -21 -30 -4 --9 0 -6 -23 -44 -14 -12 -14 -43 -16 -23 -15 -17 -48 -39 -45 -39 -62 -49 -20 -15 -11 -33 -17 ` -26 0 -4 3 -3 -19 . -40 -11 --9 -11 -39 -12 -20 -12 -13 -41 -34 -37 -33 -56 -43 -16 -11 -6 --29 -12 -22 5 1 7 0 -16 -34 -8 -6 -8 -35 -9 -17 -9 -10 -37 -30 -33 -29 -50 -37 -11 -7 -1 -24 -5 -17 10 9 11 4 -11 -30 -3 -2 -4 -31 -4 -12 -5 -5 -30 -25 -26 -24 -39 -26 11.3 11.1 8.5 14.1 12.1 12.3 11.3 8.2 13.3 12.3 13.1 13.4 12.4 8.2 4.9 12.1 9.7 14.6 8,7 * United States data compiled from U. S. Weather Bureau Records for years indicated, and Canadian data from the Climatological Atlas of Canada for years indicated. b Col. 2. The stations followed by letter A are airport stations; all others are city office stations and are followed by letter C. * Col. 3. The elevations marked c are ground elevations of the station. All other elevations given are the actual elevations of the thermometer bulb above mean sea level. d Col. 4. The periods of record indicated apply only to the lowest temperature ever recorded shown in . Col. 5, and generally extend from a summer month of the first year indicated through the spring months of the last year indicated. The periods marked by * terminated in December of the year indicated Average of readings of one lowest temperature obtained for each year for period of record. For Canada, in some cases, more than one location have been used. *For period October to April, inclusive. * It should be noted that Col. 8 in the United States section of the table applies only to airports, as these data for city stations are not available at this time. The temperature shown is the minimum hourly out door temperature which has been equalled or exceeded 9716 percent of the total hours in December, January and February for the period of record. It is pointed out that in most cases the airport stations are outside of the city and these data would apply primarily to rural areas. h Col. 9 indicates the maximum wind velocity which occurred at temperatures the same as, and lower than, the temperatures shown in Col. 3. 1 Col. 10 records design temperatures in use by A.S.H A.E. Members as reported by Chapter Secretaries for the various stations. Where these were not available the design temperatures from an A CRM A publics-. tion and various other sources have been inserted. J The wind .velocities indicated in Col. 11 were furnished by the U. S. Weather Bureau and corrected through Feb. 1948. k A bulletin prepared by A.S.H.A.E. and U. S. Weather Bureau for annual weather data of city of Detroit indicates 6 as design temperature based on Dec. to March, inclusive. m Computed for Reading by Karl Shelley and O. F. Smith. n The winter design temperatures for Canadian cities for bases of 1, 2H, 5 and 10 percent are the Fahrenheit temperature values at or below which 1, 2>5, 5 and 10 percent of the January hourly outdoor temperatures occur, for the 10 years 1941 to 1950. The tabulated values are based on hourly temperature observations lor some of the cities and upon the difference between the mean monthly temperature and the design temperature for the remainder of the cities listed. Most of the wind speeds are based on periods ending in 1947 which are somewhat shorter than tb periods for the minimum temperatures. The three months, December, January and February were used- Heating Load 257 F io . 1. s o t h e r m s o f W in t e r O u t d o o r D e s ig n T e m p e r a t u r eI tween the 0 F and 10 F isotherms would normally have a design temperature pf 5 F although sharp changes in elevation must be taken into consideration In mountainous areas where large differences in climate may occur within relatively small distances. This map will be of considerable value in selecti ng design temperatures for cities and towns not listed in Table 1. The design temperatures in Column 10 of Table 1 are often used with a design wind velocity of 15 mph. However, Column 11 shows that the