Page 223 - Building Regulation Design Guidelines - Architecture Book (Blue Code)
P. 223

SEcTION  21  UTILITY SERVICES                                             SEcTION: 21  UTILITY SERVICES







                21.1  WATER SUPPLY TANKS                                                                 21.2.7   If  the  tanks  are  made  of  reinforced  concrete  and  non-porous
                                                                                                                material, a minimum distance 1.0 meter shall be provided from
                     21.1.1   Water supply tanks and installations shall comply with                            the adjacent building and fence. If it is made of block work or
                            the Authority‘s relevant code.                                                      brick, a minimum distance of 3.0 meters shall be provided with a
                     21.1.2   Water supply tanks shall be provided with lockable inspection                     minimum depth of 1.5 meter from the level of the bottom surface
                            openings of adequate size for cleaning process. Openings shall                      of the pipe connected to the inlet.
                            be located away from the direct day to day movements and
                            sources of contamination, and shall be positioned higher than
                            the floor level.                                                        21.3  PLUMBING WORKS

                     21.1.3   Design of tank shall take into consideration that the tank                 21.3.1   Plumbing works shall comply with the Authority‘s relevant code.
                            shall be free from sharp corners that may accumulate dirt or
                            prevent thorough cleaning.                                                   21.3.2   An inspection chamber shall be fitted at each point where the
                                                                                                                direction of drainage pipes changes or at which the degree
                     21.1.4   Location of water supply tanks shall be chosen as far as possible                 of slope changes or at the junction of a branch and main line.
                            from drainage network lines, inspection chambers, septic tanks                      Distance between any two successive inspection holes shall not
                            and soak ways.  In all cases, drainage pipe lines shall not be                      exceed 15.0 meters.
                            permitted to run above or next to water tanks in case such tanks
                            are fitted underground.                                                      21.3.3   No inspection chambers shall be constructed inside roofed
                                                                                                                buildings except in shafts, service rooms, car sheds and
                                                                                                                adequately ventilated corridors. Such chambers shall be of
                21.2  SEPTIc TANKS                                                                              dry type. Drainage pipes that extend underneath the flooring
                                                                                                                and inside walls shall be protected from any external works or
                     21.2.1   Septic tanks shall comply with the Authority‘s relevant code.
                                                                                                                against settlement of floors.
                     21.2.2   Septic tanks shall be within the plot limits.
                                                                                                         21.3.4   All inspection chambers shall be dug within the plot limits.
                     21.2.3   Septic tanks shall be located close to the approach road or
                            alleyway and distanced from the main building and the adjacent               21.3.5   All basement levels shall be provided with appropriate means
                            buildings to the plot. Location shall be subject to approval by the                 and ways for drainage and filtration of water such as sand
                            Authority and should be capable of being connected in future                        separation rooms, pumps, grease traps, etc.
                            with the public drainage network.
                     21.2.4   Septic tank ceiling shall be made of reinforced concrete in order     21.4  RAINWATER DRAINAGE
                            to withstand the load of vehicle traffic if necessary.
                                                                                                         21.4.1   Rainwater drainage shall comply with Authority’s relevant code.
                     21.2.5   Tanks shall have an opening of adequate size with a heavy duty
                            lockable cover and top surface of the cover shall not rise above             21.4.2   The system for carrying rainwater from a roof shall be adequate.
                            the finished ground level of the site in which it is situated.                      The system shall carry the flow to an outlet to minimize the risk of
                     21.2.6   Septic tanks shall  be  accessible  for  cleaning,  maintenance                   blockage or leakage and be accessible for cleaning blockages.
                            and  evacuating process.


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