7.1 Case 1: The travel time T,
according to appendix 1 to the Interim Guidelines, is the maximum tI
(equation 2.2.11) multiplied by 2.3 (sum of correction
factor and counterflow correction factor). The maximum values of tI
for each escape route are given in the following:
|
Escape route on
|
Tdeck
|
tf
|
tstair
|
tassembly
|
tI
|
T
|
Notes
|
| Deck 11
|
48.2
|
104.4
|
22.7
|
10
|
185.3
|
426.2
|
1
|
| Deck 10
|
43.5
|
104.4
|
17
|
10
|
174.8
|
402
|
1, 2
|
| Deck 9
|
48.4
|
104.4
|
8.5
|
10
|
171.3
|
394
|
1, 2
|
| Deck 8
|
0
|
104.4
|
0
|
10
|
114.4
|
286.1
|
|
| Deck 7
|
37.1
|
108
|
10.6
|
10
|
163.9
|
377
|
1
|
| Deck 6 – stair A (fore)
|
42.4
|
108
|
21.2
|
10
|
179.6
|
413.1
|
1, 3
|
| Deck 6 – stair B (aft)
|
34
|
108
|
21.2
|
10
|
170.2
|
391.5
|
1, 3
|
| Deck 5
|
42.2
|
108
|
31.8
|
10
|
190.2
|
437.5
|
1,
3
|
Note
1 The flow time, tf
,
is the maximum flow time recorded on the whole escape route from the
deck where persons started evacuating up to the muster station.
Note
2 The travel time on the stairways (t stair)
is the total time necessary to travel along all the stairs from the
deck where persons originally started evacuating up to the deck where
the assembly station is located; in the present case, t stair
for persons moving down from deck 11 is therefore the sum of t stair
from deck 11 to 10 (5.7 s), from deck 10 to 9 (8.5 s) and from deck
9 to 8 (8.5 s), in total 22.7 s; similarly for the other cases.
Note
3 The travel time on the stairways (t stair)
is the total time necessary to travel along all the stairs from the
deck where persons originally started evacuating up to the deck where
the assembly station is located; in the present case, t stair
for persons moving up from deck 5 is therefore the sum of t stair
from deck 5 to 6 (10.6 s.), from deck 6 to 7 (10.6 s) and from deck
7 to 8 (10.6 s), in total 31.8 s; similarly for the other cases.
Accordingly, the corresponding value of T is
437.5 s.
7.2 Case 2: The travel time T, according
to appendix 1 to the Guidelines, is the maximum tI
equation
2.2.11) multiplied by 2.3 (sum of correction factor and counterflow
correction factor). The maximum values of tI
for
each escape route are given in the following:
|
Escape route on
|
Tdeck
|
tf
|
tstair
|
tassembly
|
tI
|
T
|
Notes
|
| Deck 9
|
0
|
110.4
|
6
|
12.7
|
168.3
|
387.2
|
1, 2
|
| Deck 8
|
0
|
110.4
|
0
|
12.7
|
162.4
|
373.4
|
|
| Deck 7 –
stair A
|
0
|
149.7
|
10.6
|
0
|
160.3
|
368.6
|
|
| Deck 7 –
stair B
|
0
|
149.7
|
10.6
|
0
|
160.3
|
368.6
|
|
| Deck 7 –
stair C
|
0
|
141.3
|
10.6
|
12.7
|
164.6
|
378.7
|
2
|
| Deck 6 –
stair A
|
0
|
149.7
|
21.2
|
0
|
170.9
|
393
|
1, 3
|
| Deck 6 –
stair B
|
0
|
149.7
|
21.2
|
0
|
170.9
|
393
|
1, 3
|
| Deck 6 –
stair C
|
0
|
141.3
|
21.2
|
12.7
|
175.2
|
403.1
|
1, 2,
3
|
Note
1 The flow time, tf
,
is the maximum flow time recorded on the whole escape route from the
deck where persons started evacuating up to the assembly station.
Note
2 In this example, stairs A and B are already
leading to the embarkation station, therefore only those escape routes
passing through stair C need additional time, tassembly
,
to reach the assembly station.
Note
3 The travel time on the stairways (tstair
) is the total time necessary to travel along all the
stairs from the deck where persons originally started evacuating up
to the deck where the assembly station is located; in the present
case, tstair
for persons moving from deck
6 is therefore the sum of tstair
from deck
6 to 7 (10.6 s) and from deck 7 to 8 (10.6 s).
Accordingly, the corresponding value of T is
403.1 s.