58
(c) Fire Resistance. The material shall be such as will not readily ignite
in the position in which it is laid.
(d) Water absorption. The material shall be such that, after being immersed in water for a period of 48 hours, the moisture content of the material will not exceed 7 per cent of its dry weight: Provided that the Director may exempt any ship from the requirement of this sub- paragraph.
(e) Adhesion. The material shall be so laid as to adhere closely under all
conditions of service to the surface on which it ja laid,
(f) Non-corrosion. The material shall not contain any substance which may cause corrosion of the deck on which it is laid, unless the deck is effectively protected from corrosion by a coating applied for the purpose.
(g) Danger to person. The material shall be such as will not produce any
injurious effect upon persons who may come in contact with it.
(k) Resistance to wear and weather. The material shall be sufficiently bard and strong to withstand all conditions of service and shall be sufficicatly flexible to prevent cracking under those conditions,
Te If the material is laid in a permanent hospital, it shall be material not likely to be damaged by surgical spirit or other liquids which may be used in the hospital.
3. If the material is laid on the crown of an oil fuel tank, the material shall be such that if it is immersed in fuel oil for a period of 24 hours at i temperature of 150°F. the weight of the material will nôt increase by more than 1 per cent and the material will not be penetrated by the oil.
PART II.
59
Markings for spaces other than sleeping rooms.
Certified for Chief Officer (1)
Certifled for Officers.
Certified for Petty Officers. Certified for Apprentices, Certified for Crew.
(*) There shall bere be inserted the maximum number of seamen who may be accommodated in the room in accordance with these regulations whee it is not appropriated to use solely by such ratings as are referred to in regulation 392).
(t) There shall bere be inserted the maximum number of seamen who may be accommodated in the room in accordance with these regulations when it is appropriated to use solely by such ratings as are referred to in regulation 39(2).
In the case of a room intended for the sole use of any other officer the rank of that officer shall here be substituted.
FIFTH SCHEDULE, Heating Systems.
[reg. 11(3).]
1. The beating system shall be tested on board and deemed adequate if
it is capable of maintaining the difference in degrees Fahrenheit between room and ambient temperature at the figure given by 37
1.3
-30.
Where T=temperature of radiator or heating coil and
THIRD SCHEDULE.
Insulating Muterial for the Underside of Decks.
[reg. 2)
The insulating material referred to in paragraph (2) of regulation 8 of these regulations (in this Schedule referred to as "the material") shall comply with the following requirements—
(a) Thermal Insulation. The material shall provide thermal insulation o
Jess than that provided by a wooden deck 24 inches thick.
(b) Fire Resistance. The material shall be such as will not readily ignite
in the position in which it is laid.
(c) Adhesion. The material shall be so laid as to adhere closely under all
conditions of service to the deck under which it is laid.
(d) Non-corrosion. The material shall not contain any substance which may cause corrosion of the deck under which it is laid, unless the deck is effectively protected from corrosion by a coating applied for that purpose,
FOURTH SCHEDULE.
Marking.
PART I.
Markings for Sleeping Room,
Certified for (*) seamed.
Certified for A(†) scamen.
Certified for (") seamen or A(t) seamen.
[reg. [6.)
= ambient temperature, both in degrees Fahrenheit,
2. During tests on board, doors, side scuttles and skylights may be kept closed but ventilators are to remain open. The mechanical ventilation system, if fitted, shall be in operation but will not be required to supply more than 15 cu. ft. of fresh air per person per minute.
test,
3 A period of twenty-four hours shall be allowed for warming up before
4. Central hot water systems shall be capable of maintaining the required emperature for a period of at least 6 hours with fires banked unless a system of automatic fuel feeding is fitted.
5. Central hot water heating installations should preferably be on the two ripe system the flow pipe being run at a sufficiently high level without long borizontal leads as far as may be practicable and vented independently of air cocks on radiators or on the circuits. Radiators should be kept off the door, but no higher than accessary to provide a good slope for the return to the boiler in the worst condition of trim. Screw plugs or cocks should be fitted to the radiators. A make-up tank of adequate capacity should be provided and should have a permanent connexion for filling from the fresh water system, with, if practicable, automatic control. Exposed pipes and tanks should be lagged or ulated, and the maker's instructions and a diagram of the installation should he conveniently posted in the ship.
if a single pipe system is used particular care must be taken to ensure that there is an adequate circulation head under the worst conditions of trim, either by pravity or by power-driven accelerator.
6. Boiler compartments should be built of steel and suitably insulated. wavoidably, they open off passages forming part of crew accommodation bey should be provided with self-closing doors situated well clear of crew's excapes. The compartments should be well ventilated and means should be
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