Content Page: 9 Drainage and Sewerage

  • Junctions To Sewers

    —

    by

    zezuru_mv55g8

    (1) Every branch sewer shall join another sewer in the direction of the flow of such sewer at an included angle of 45 degrees and as near as practicable to the invert thereof. (2) All earthenware junctions shall be made by means of ordinary or channel junctions complying with the requirements of C.A.S. No. A16.

  • Joints In sewers

    —

    by

    zezuru_mv55g8

    (1) All sewer-pipes shall be centred and joined concentrically with the invert on true line. (2) If sewers are constructed of cast-iron socketed pipes, the joint shall be secured to a depth of at least half the socket depth with molten lead, run in one pouring, or with lead wool, properly caulked. (3) If sewers…

  • Sewers On Bad Or Made-Up Ground

    —

    by

    zezuru_mv55g8

    All sewers on bad or made-up ground or ground producing unequal bearing shall be laid in a manner in all respects satisfactory to the local authority, which shall take into consideration the nature of the ground and the properties of the pipes and joints being used.

  • Sewers Within Or Under Buildings

    —

    by

    zezuru_mv55g8

    (1) No sewer or part thereof may be laid or may pass, as the case may be, within or under or through a building unless the local authority decides otherwise, having regard to considerations of health and maintenance or other matters relevant to the particular case. (2) Every sewer or part thereof, where it is…

  • Depth Of Cover To, And Protection Of Sewers

    —

    by

    zezuru_mv55g8

    (1) All sewers, other than cast-iron sewers, having less than 300 millimetres clear cover over the socket of the pipe shall be adequately protected by encasing in concrete not less than 100 millimetres thick, having a composition not inferior to 50 kilograms of cement to 100 cubic decimetres of fine aggregate to 200 cubic decimetres…

  • Access To Sewers

    —

    by

    zezuru_mv55g8

    (1) Means of access shall be provided in sewers at distances between every such means of access not exceeding 50 metres in the case of 100-millimetre-diameter sewers, and 80 metres in the case of 150 millimetre or large diameter sewers. (2) Access-eyes or rodding-ways for sewers shall have a minimum diameter of 100 millimetres. (3)…

  • Access To Ramps Or Back-Drops

    —

    by

    zezuru_mv55g8

    Every ramp or back-drop exceeding 750 millimetres in length shall be provided with an access-eye or other means of access at its head.

  • Access To Branch Sewers

    —

    by

    zezuru_mv55g8

    Every branch or part of a sewer exceeding 3 metres in length shall be provided with an access-eye or other means of access at its top end.

  • Access To Sewers And Public Sewers

    —

    by

    zezuru_mv55g8

    A manhole or other approved means of access shall be constructed on the premises upon which a sewer is laid, and shall be located not more than 1,2 metres from the connexion of such premises, or in such position as may be authorized by the local authority, in order to afford ready access to such…

  • Construction And Size Of Manholes

    —

    by

    zezuru_mv55g8

    (1) The walls of every manhole installed on a sewer shall be— a) constructed of brickwork not less than 200 millimetres thick, composed of bricks, complying with the requirements of C.A.S. No. A35, Burnt clay building bricks and blocks, set in cement mortar having a composition not inferior to three parts of sand to one…