52
Adjoining compart-
BUILDING (CONSTRUCTION) REGULATIONS, 1956
*
TABLE XVI-(CondL)
Class
Use
Volume, or floor area in any one storey (as the case may be).
Fire Resistance
Period.
Transformer Chamber or purpose involving a similar fire risk.
2 hours.
Garage purposes.
(a) Not more than 500 sq. ft, in floor
hour.
Area
(8) More than 500 sq. ft. but not mote than 1,000 sq. ft. in floor area.
1 hour.
(c) More than 1,000 sq. £t. in floor area.
2 boure.
-
(2) Save with the consent of the Building Authority the floor area of any one compartment used for bulk storage or warehouse purposes shall not exceed 7.500 sq. ft.
(3) Where a single storey building does not exceed 250,000 cu. ft. in volume or 25 feet in height, steel work therein other than columns and beams in external or party walls may, subject to the provisions regarding the use of structural steel in regulation 77, be unprotected.
(4) The joints of and any elements of construction shall be right and proof against the passage of smoke or flame.
97. Every compartment of a building shall be separated from ments to be any adjoining compartment by a wall made of bricks, building separated. blocks or re-inforced concrete having an F.R.P. not less than 2
hours:
Staircases.
Provided that this regulation shall not apply where adjoining compartments are used solely for domestic purposes.
98. (1) Each element of construction of a staircase shall have an F.R.P. not less than the period required for each element of construction of the building or compartment in which the stair- case is situated :
Provided that this paragraph shall not apply to staircases enclosed in accordance with paragraph (a).
BUILDING (CONSTRUCTION) REGULATIONS, 1956
(2) Where a staircase serves more than one compartment of a building-
(a) such staircase shall be enclosed by walls, and
(b) such walls shall have an F.R.P. not less than the longer period required for the elements of construction in any compartment so served:
Provided that this paragraph shall not apply to any external staircases open to the weather on at least two sides.
99. Where compartments of a building to which the pro- Topmoat
visions of regulation 97 apply are situated in the topmost storey storeys. of a building, the walls required by that regulation shall be carried up to the underside of the roof of the storey:
Provided that where the ceiling is formed beneath a pitched roof, the walls need only be carried up to the underside of the roof so as to form in the roof space vertical firechecks at a distance apart not exceeding 120 feet,
63
100. Walls separating compartments of a building or enclosing Openings
in walla staircases, in accordance with regulation 97 or 98, may have separating openings where-
(a) the door and frame of such opening has an F.R.P.-
(i) in the case of walls separating compartments } hour,
or
(i) in the case of walls enclosing staircases } the period
required for such walls:
Provided that in no case shall the door have an F.R.P. less than hour; and
(b) such door is self-closing, except in the case of such a door in a domestic building which does not lead from a staircase to a corridor used in common.
་
compari- mants or enclosing staircasea.
101. (1) Borrowed lights may not be provided in walls Horrowed separating compartments of buildings in accordance with regula- lights.
rion 97.
(2) Where borrowed lights are provided in walls enclosing staircases in accordance with regulation 98 such lights shall- (a) not exceed 1/5th of the total area of such wall, and