1956-HKRS30-8-46_Part03 — Page 34

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parapet or railings.

Hollow ceilings.

Steel

BUILDING (CONSTRUCTION) REGULATIONS, 1956

75. Every part of a roof, to which internal access is provided, shall be protected by parapet walls or railings not less than 3 ft. 6 ins. in height.

78. Where a ceiling is constructed with a space between it and the flour or roof above, such space shall be properly protected against vermin and in the case of a timber floor or roof, such space shall also be adequately ventilated,

PART IX.

Structural use of Steel, Reinforced Concrete and Timber.

T7. (1) Steel framed structures reinforced concrete structures framed and and structural timbers shall be designed in accordance with the

relevant provisions of-

reinforced

concrete structuras. Structural timbers.

(a) the London Building By-laws, Memoranda and Regula

tions, issued by the London County Council on the 1st day of January, 1938; or

(b) the London Building (Constructional) By-laws 1952, Issued by the London County Council on the 1st day of January, 1953; or

(c) any subsequent amendments to the London Building (Constructional) By-laws, 1952 issued from time to time by the London County Council : Provided that—

(i) the maximum loads and permissible stresses shall be those exclusively referable to the particular By-laws in accordance with which such structure is being designed: and

(ii) notwithstanding any provisions to the contrary, all such structures shall comply with the requirements of regulations 22 and 23.

(2) Where any steel framed or reinforced concrete structure is designed and constructed in accordance with the provisions of sub-regulation 1(b) or (c) the structural details and calculations required by regulation 16(2) of the Building (Administration) Regulations shall be prepared and signed by a person qualified as an engineer as provided by regulation 4 of those regulations but excluding persons qualified as an engineer under sub-regula- tion (1) (a) (iv) thereof,

BUILDING (CONSTRUCTION) REGULATIONS, 1956

(3) Structures may be designed and constructed in pre- stressed concrete, shell construction or in any other methods and materials, subject to the production of satisfactory proof to the Building Authority regarding the soundness of design.

PART X.

Wharves, piers and sea-walls.

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78. Every sea wall, breakwater, jetty, mole, quay, wharf or Wharves, pier shall be designed and constructed to the satisfaction of the piers and Bee-walls. Building Authority.

PART X1.

Retaining Walls.

79. Retaining walls may be constructed of masonry, brick- Materiala. work, plain or reinforced concrete or steel sheet piling, and shall support the ground which they retain.

80. (1) Except where steel sheet piling is used, a foundation Founda-

tions. of concrete shall be provided on solid, undisturbed ground or on piles.

(2) Such foundation shall extend for the full thickness of the retaining wall.

81. Retaining walls constructed of brickwork shall be proper- Brickwork. ly bonded and built solid throughout in cement mortar,

62. Retaining walls constructed of masonry may be built in Masonry. cement mortar or dry. In either case the wall shall be properly bonded.

COLTRER

83. (1) Retaining walls constructed of brickwork or masonry Bond exceeding 12 feet in height shall be provided with one or more required. bond courses of concrete, in no respect inferior to Grade III at least 12 inches in depth :

Provided that bond courses of reinforced concrete may be less than 1 inches in depth.

(2) The distance between the foundation and the first of such bond courses and the distance between any two adjacent bond courses shall not exceed 6 feet measured vertically.