Eric Tishman
-2-
June 22, 2004
calculated AF to generate an appropriate T&D guideline value for a wide range of release
durations. Values of AF for a range of release durations are provided below in Table A-1:
TABLE A-1
Adjustment Factors for Different Smoke Release Durations
Adjustment Factor (unitless)
Release Duration
(sec)
(100% or 50% setting)
(10% setting)
5 0.66 0.49
10 0.73 0.53
15 0.79 0.58
20 0.86 0.63
25 0.93 0.67
30 1.00 0.72
35 1.07 0.77
40 1.13 0.81
45 1.20 0.86
50 1.27 0.91
55 1.34 0.95
60 1.41 1.00
90 1.81 1.28
120 2.22 1.56
Note: For release durations other than those listed in this table, the
equations on page 1 of this addendum can be used to calculate AF.
Example calculations:
1.
Using Rosco Fog Fluid with the Delta 3000 at a 50% setting, Table 2 from the T&D
Guideline report gives a value of
94 SECONDS
at 10 feet from the release point. For a
release duration of 15 seconds, the adjustment factor is:
AF = (1.36
×
[15 sec] + 59) / 100 = 0.79
Therefore, the T&D value would be 94 seconds
×
0.79 or
74 SECONDS
.
2.
Using Rosco Clear Fog Fluid with the Delta 3000 at a 10% setting, Table 2 from the T&D
Guideline report gives a value of
130 SECONDS
at 6 feet from the release point. For a
release duration of 30 seconds, the adjustment factor is:
AF = (0.93
×
[30 sec] + 44) / 100 = 0.72
Therefore, the T&D value would be 130 seconds
×
0.72 or 9
4 SECONDS
.
