【法规名称】
【法规编号】 79807 什么是编号？
【正 文】
第9页 CAP 123B BUILDING (CONSTRUCTION) REGULATIONS
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[接上页] Every appliance producing products of combustion shall have adequate provision for the discharge of the products of combustion to the outside air. (Enacted 1990) Cap 123B reg 46 Construction of chimneys and fireplaces (1) Every chimney, flue, hearth and fireplace recess shall be- (a) constructed of non-combustible materials of such a nature, quality and thickness as not to be unduly affected by heat, condensation or the products of combustion; (b) so constructed and of such thickness or, in the case of a flue, placed or shielded as to prevent the ignition of any part of any building.(2) Every chimney shall be so constructed that- (a) the temperature of the exposed faces shall not reach a level that would cause damage to nearby parts of the building; (b) the products of combustion shall not escape through the walls of the chimney.(3) Every flue shall- (a) whether inside or outside the building, be so placed or shielded that there is neither unnecessary risk of accidental damage to the flue nor unnecessary danger to persons in or near the building; (b) terminate in such a position that the products of combustion cannot enter nearby windows or other openings, fresh air inlets, mechanical ventilation inlets or exhausts. (Enacted 1990) Cap 123B reg 47 Corrosion (1) Any metal used in the construction of a flue or chimney shall be protected against corrosion. (2) Metals shall not be used in such combinations as to cause electrolytic or chemical action which could adversely affect any part of a flue or chimney. (3) At the point where a chimney or flue penetrates the wall or roof of a building a flashing shall be provided that is suitable and takes into account different co-efficients of expansion and electrolytic or chemical action. (Enacted 1990) Cap 123B reg 48 Roofs to be weatherproof PART XI ROOFS Every roof shall be weatherproof. (Enacted 1990) Cap 123B reg 49 Flat roof (1) A flat roof adjoining any building shall be at a level of not less than 150 mm below any adjoining usable floor space. (2) Access for maintenance shall be provided to every flat roof. (Enacted 1990) Cap 123B reg 50 Cement PART XII STRUCTURAL USE OF CONCRETE Materials (1) Cement for concrete shall be ordinary, rapid hardening or sulphate resisting Portland cement of such composition, manufacture and chemical and physical properties as are suitable for the production of concrete. (2) High alumina cement shall not be used for concrete.Materials (Enacted 1990) Cap 123B reg 51 Aggregate (1) Subject to subregulations (2) and (3) aggregates used shall be crushed or uncrushed natural mineral substances and shall comply with the quality and grading requirements suitable for the production of concrete. (2) Separate fine and coarse aggregate shall be used for concrete. (3) No concrete containing embedded metal shall have in it unwashed marine sand. (Enacted 1990) Cap 123B reg 52 Water Water for concrete shall be clean, fresh water free from harmful matter. (Enacted 1990) Cap 123B reg 53 Admixtures (1) The admixtures used for concrete shall be suitable and effective for the purpose of modifying the workability, rate of stiffening or hardening, or colouring of concrete. (2) The chloride ion content of admixtures for concrete containing embedded metal or for concrete containing sulphate resisting Portland cement shall not exceed 2% by mass of admixture or 0.03% by mass of the cementitious content, whichever is the less. (Enacted 1990) Cap 123B reg 54 Reinforcement Reinforcement for concrete shall be hot rolled steel bars, cold reduced steel wire or steel fabric of suitable composition, manufacture, and chemical and physical properties. (Enacted 1990) Cap 123B reg 55 Pre-stressing tendons Pre-stressing tendons for concrete shall be high tensile steel wire and strand or high tensile alloy steel bars in the hot rolled or hot rolled and processed condition of suitable composition, manufacture, and chemical and physical properties. (Enacted 1990) Cap 123B reg 56 General Designed mix concrete (1) Subject to regulation 60, each grade of concrete shall be designed mix concrete and shall be denoted by a specified grade strength in MPa with the suffix D and the nominal maximum size of aggregate in millimetres. (2) The cement content of any concrete mix shall not exceed 550 kg per cubic metre of the compacted concrete. (3) The total chloride content of the concrete mix shall not exceed the limits specified in Table 4 expressed as a percentage relationship between chloride ion and mass of cement in the mix. TABLE 4 MAXIMUM TOTAL CHLORIDE CONTENT OF CONCRETE MIX Type of concrete Maximum total chloride content Pre-stressed concrete Steam-cured concrete 0.1 Concrete made with sulphate resisting Portland cement 0.2 Concrete containing embedded metal and made with ordinary or rapid hardening Portland content 0.35(4) All concrete shall be considered as being subjected to one of the following exposure conditions namely- |
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