APPENDIX D (continued)
Incidence angle, alpha, on windward face, alpha = 47.5deg = 47.5deg
from site plan and prevailing
wind direction (see Figure C-2).
From Table C-1 or C-2 determine: (used 45deg.)
WPC = +0.6
Leeward pressure coefficient, LPC
LPC = -0.5
PCD = WPC - LPC
For the surrounding neighborhood and the
proposed building type, determine from
Table C-3 the pressure coefficient
correction factor, PCCF.
Bldg type No. 5
h = 23 ft g = 65 ft
h/g = 2.8
Calculate the revised pressure
PD = 0.67
coefficient differential, PD
PD = PCD * PCCF
Obtain terrain correction factor, TCF,
from Table C-4.
Terrain type suburban
Compute revised meteorological wind speed
817 fpm =
fpm in feet per minute, W.
W = WS * TCF * 101.2
A = 18.5ft2 = 17.0 ft2
Calculate required open effective
window area, A.
A = (1.56 * CFM) / [W * (PD)1/2]
72 ft2 =
Calculate the inlet window area for the
proposed design, Wi .
type, screens, etc., from Table C-5.
40 ft2 =
Calculate the effective open inlet
area, Ai .
Ai = Wi * RFi
21 ft2 =
Calculate required open outlet area, Ao.
Ao = A x Ai / [(Ai2 - A2)1/2]
40 ft2 = 40 ft2
Calculate the outlet window area for the
proposed design, Wo.