54
cabins except that provision of one pilot's cabin and onc owner's cabin, whilst not being themselves deductible, will not preclude deduction of spaces shared with the officers provided there are no more than two berths in each such room and provisions for their occupants has been made in the public
rooms;
(2) Crew spaces which are normally exempt from tonnage measure. ment will not be so excmpt unless they comply with these regulations wherever applicable.
Category
Space
TABLE L
A
Rooms (other than rooms in Category in deck houses above the upper or shelter deck-
55
Fresh air changes per hour
Volume of fresh air. in cu. ft, per minute, for each person likely
to use the room at any one time
FIRST SCHEDULE,
Trunked Mechanical Pentilation Systems and Electric Fans.
[regs. 201) and 1440) and (4) and 32(101
A. TRUNKED MECHANICAL VENTILATION SYSTEMS,
L.
The trunked mechanical ventilation system referred to in paragraph (1) of regulation 2 and paragraph (3) of regulation 13 of these regulations (in this Schedule referred to as "the system") shall, in relation to the spaces specified in the second column of Table T annexed hereto, be capable of the respective standards of performance specified in the third or fourth column of that Table, whichever standard shall be the higher in the circumstancca:
Provided that nothing in Table 1 shall be taken to relate to a space specified
in the second column of Table II annexed hereto.
2. The systern shall, in relation to the spaces specilled in the second column of Table II, be capable of the respective standards of performanc specified in the third and fourth columns of that Table.
3. If any store room is served by a fan which provides warmed air for any other space, the store room shall be provided with ventilation trunking separate from that serving such other space.
4. The clear area of the exhaust openings which shall be provided conjunction with the system shall be sufficient to ensure that the velocity of air at each exhaust opening does not exceed 1,000 feet per minute when the system is in operation."
5. The speed of every supply fan forming part of the system shall b capable of being varied where direct current molors are used.
6.
The system shall be quiet in operation.
T
All trunking forming part of the system shall be provided with poo return flaps where such flaps are necessary for the exclusion of effluvia and the preservation of the health of the crews.
8. If the system is designed to circulate heated air as the sole means Di heating the crew accommodation, the system shall be sub-divided into section! which can be separately controlled to the extent necessary to enable a comfort- able temperature to be maintained in all parts of the crew accommodation.
9. If an air-conditioning system circulating cooled air is used the outer of air changes and volumes of air to be supplied shown in the tables may be reduced as approved by the Director, A measure of recirculation may k permitted subject to a minimum supply of fresh air of not less than 15 cubic feet per man per minute. Recirculation of air from washing and sanitary accommodation, galleys, pantries and store rooms will not be permitted without adequate measures for purification and deodorization. Recirculation of air from a hospital ward will not be permitted under any circumstances,
10. Means are to be provided to enable the ventilation taking to be cleaned internally.
E
(1) Outside rooms (other than rooms adjoining machinery casing) kumm) | Cara me {(2) Inside rooms and rooms adjoining machinery casing.
Rooms (other than rooms in Category 0) in side-to-side [soper-structure above the upper or shelter deck-
(1) Outside rooms (other thao! rooms adjoining machinery| casing)
I-h|,,
(2) Inside rooms and rooms adjoining machinery casing.
Mesa rooms, smoking rooms and recreation rooms (in each case above the upper or shelter decky
10
50
15
50
12
50
15
50
(T) Net adjoining machinery
casing
15
(2) Adjoining machinery casing.
18
* 25
1
Passageways adjoining machiu- ery casing
4
E
Rooms in 'tween decks (includ- ing shelter 'tween decks) of ships propelled by internal combustion machinery-
(1) Rooms clear of machinery
casing
(2) Rooms abreast of but not adjoining machinery casing.
12
50
12
50
mess
13) Rooms adjoining machinery
casing (other than rooms, smoking rooms and recreation rooms) komme
(4) Mess rooms, smoking rooms and recreation rooms (in each case ad-) joining machinery casing).
ค
IS
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ts
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