Heating and Wind Design Conditions for South Africa

City Lat. Long. Elev. Std. Pres. Heating Dry Bulb, °F Extreme Wind Speed, mph Coldest Month WS / MCDB MCWS / MCWD to DB Annual Extreme Daily
0.4% 1% 99.6% 0.4% Mean DB Std. DB
°N °W Feet psia 99.6% 99% 1% 2.5% 5% WS MCDB WS MCDB MCWS PWD MCWS PWD Max Min Max Min
Bloemfontein 29.10 S 26.30 E 4422 12.498 26 28 24 21 19 21 55 18 58 1 220 12 270 98 22 2.5 3.1
Cape Town 33.98 S 18.60 E 137 14.627 38 41 32 29 26 31 57 28 58 0 40 12 170 94 34 2.9 1.4
Durban 29.97 S 30.95 E 26 14.686 50 52 27 23 21 24 70 21 69 1 340 14 30 93 46 2.2 2.0
Johannesburg 26.13 S 28.23 E 5577 11.969 34 37 22 19 17 19 55 18 54 9 210 9 300 89 29 1.8 3.1
Marion Island 46.88 S 37.87 E 72 14.662 30 32 60 53 47 59 38 52 43 17 200 22 290 68 24 9.0 4.3
Port Elizabeth 33.98 S 25.60 E 196 14.596 43 46 33 29 26 31 58 28 60 2 270 10 290 97 38 3.8 2.2
Pretoria 25.73 S 28.18 E 4337 12.538 39 41 14 12 11 13 61 11 59 1 220 4 270 94 35 2.9 2.0