Document 6wz10pdg4RLYv52M5V6LE0X4m
DESIGN PROCEDURE
DUCT ENLARGEMENT
/ inch change in diameter to every 5 inches in length
GOOD
DUCT CONTRACTION
BAD
6-39
l inch change in diameter to every 5 inches in length.
GOOD
BAD
STACKHEAD
% 2000
Iv 2400
/7---S\ /s
!2
to
n 3000
e
p *!
4
e
io ai V
RIGHT
Vertical discharge cap throws upword where dilution will take place.
WEATHER CAP
WRONG
Defecting weother cap discharges downward.
AMERICAN CONFERENCE OF GOVERNMENTAL INDUSTRIAL HYGIENISTS
PRINCIPLES OF DUCT DESIGN
date
9-66
1 Fig. 6-22
SPNY 001314