A
16-storey high building has plan dimensions of 60 x 60 (W=60 ft.
and L=60 ft.). The floor height is equal to 12 feet. Under winter
design conditions, one side receives a normal wind at a velocity of
15 mph. The neutral axis lies on the 7th floor. Estimate the
pressure difference for all the four walls of the 1st and 16th
floors considering only the wind and the stack effects. What is the
net pressure difference on these floors and determine whether there
will be infiltration or exfiltration on these floors? The draft
coefficient Cd=0.8 and the indoor-outdoor temperature difference is
50oF. The standard sea level air density = 0.0765 lb./ft3.