### Merchant Shipping (Safety) (Fire Protection) (Ships Built On or After 1 September 1984) Regulations 《商船(安全)(防火)(1984年9月1日或之後建造的船舶)規例》

89. Special arrangements in machinery spaces
The following provisions shall apply to machinery spaces—
(a) the number of openings to machinery spaces shall be the minimum compatible with the proper working of the ship;
(b) windows shall not be fitted in machinery space boundaries;
(c) doors in the boundaries of machinery spaces of Category A, other than watertight doors and the fire-screen door referred to in paragraph (d), shall be arranged so that the closure of the door will be assured in the event of fire in the space; and the doors shall be provided with closing arrangements which either comply with regulation 80(6) or are provided with power operated closing arrangements operable from the control position required by regulation 70(2); and
(d) any machinery space of Category A which is accessible from an adjacent shaft tunnel shall be provided with a lightweight steel fire-screen door in addition to any watertight door; the fire-screen door shall be operable from each side and shall be located at the shaft tunnel side of the bulkhead.

90. Application
Regulations 91 to 105 inclusive of this Part apply to passenger ships of Classes I, II and II(A) carrying not more than 36 passengers. 

91. Structure
(1) The hull, superstructure, structural bulkheads, decks and deckhouses shall be constructed of steel or other equivalent material, except that the crowns and casings of machinery spaces of Category A shall be constructed only of steel.
(2) Where any part of the structure is of aluminium alloy, the following requirements shall apply—
(a) the insulation of aluminium alloy components of “A” Class divisions or “B” Class divisions, and supports of such divisions, shall be such that the temperature of the structural core does not rise more than 200oC above the ambient temperature at any time during a standard fire test of 60 minutes duration in the case of an “A” Class division and 30 minutes in the case of a “B” Class division; and
(b) the insulation of aluminium alloy components of columns, stanchions and other structural members required to support lifeboat and liferaft stowage, launching and embarkation areas, shall be such that the temperature rise limitation specified in paragraph (a) shall apply for 60 minutes duration.

### Merchant Shipping (Safety) (Fire Protection) (Ships Built On or After 1 September 1984) Regulations 《商船(安全)(防火)(1984年9月1日或之後建造的船舶)規例》

91A. Helicopter decks
(1) Subregulations (2), (3) and (4) apply to a post 1992 ship (other than a post-1998 ship) having a helicopter deck. (L.N. 254 of 2018)
(1A) Subregulation (5) applies to a post-1998 ship. (L.N. 254 of 2018)
(2) Subject to subregulation (4), the helicopter deck shall be of steel or steel equivalent fire-resistant construction.
(3) If the space below the helicopter deck is of a high fire risk, the insulation standard shall be to the satisfaction of the Director.
(4) If the Director so permits, the helicopter deck may be constructed of aluminium or other low melting metal construction that is not made equivalent to steel, except that—
(a) if the platform is cantilevered over the side of the ship, then, after the occurrence of a fire on the ship or on the platform, the platform shall undergo a structural analysis to determine its suitability for further use;
(b) if the platform is located above the ship’s deckhouse or similar structure—
(i) the deckhouse top and bulkheads under the platform shall have no openings;
(ii) all windows under the platform shall be provided with steel shutters;
(iii) after a fire on or in close proximity to the platform, the platform shall undergo a structural analysis to determine its suitability for further use.
(5) Provisions of helicopter facilities on a ship must be in accordance with the Standards for On-board Helicopter Facilities adopted by the International Maritime Organization by Resolution A.855(20). (L.N. 254 of 2018)
(L.N. 410 of 1995)

### Merchant Shipping (Safety) (Fire Protection) (Ships Built On or After 1 September 1984) Regulations 《商船(安全)(防火)(1984年9月1日或之後建造的船舶)規例》

92. Main vertical zones and horizontal zones
(1) The hull, superstructure and deckhouses in the way of accommodation and service spaces shall be subdivided by bulkhead consisting of “A” Class divisions into main vertical zones. The mean length of each zone on any one deck above the bulkhead deck shall not exceed 40 metres. Steps and recesses shall be kept to a minimum, but any which are necessary shall consist of “A” Class divisions. These divisions shall have insulation values in accordance with the tables at the end of regulation 94, except that where insulation values of “B-0” and “C” appear in table 5 the value of “A-0” shall be substituted.
(2) Any portions of such divisions which extend above the bulkhead deck shall, whenever possible, be in line with watertight subdivision bulkheads situated immediately below the bulkhead deck and shall extend from deck to deck and to the ship’s shell, and, in the case of a deckhouse, to the external plating thereof.
(2A) In every post October 1994 ship, the length and width of main vertical zones may be extended to a maximum of 48 metres in order to bring the ends of main vertical zones to coincide with subdivision watertight bulkheads or in order to accommodate a large public space extending for the whole length of the main vertical zone provided that the total area of the main vertical zone is not greater than 1,600 square metres on any deck. The length or width of a main vertical zone is the maximum distance between the furthermost points of the bulkheads bounding it. (L.N. 410 of 1995)
(3) A main vertical zone may, for the purpose of regulation 102, be subdivided by horizontal “A” Class divisions into 2 or more parts provided that such horizontal divisions shall extend between adjacent main vertical zone bulkheads and to the shell or exterior boundaries of the ship and shall be insulated in accordance with the fire insulation and integrity values given in table 6 at the end of regulation 94. (E.R. 1 of 2022)
(4) In ships designed for special purposes, such as train services, where the provision of main vertical zone bulkheads would conflict with the purpose for which the ship is intended, the Director may allow an equivalent means for controlling and limiting a fire to be substituted.
(5) In every post October 1994 ship, the mean length and width of the main vertical zones on any deck shall not in general exceed 40 metres. (L.N. 410 of 1995)