Archives: Library Snippets

  • Glass In Roofing 3

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    zezuru_mv55g8

    1 General.- Where glass is employed as a roofing-material or in vertical glazing or louvres at a height of more than 3,5 metres above the level of the interior floor concerned, the glass shall be of one of the types listed in Table VII, and shall comply with the requirements for that type. TABLE VII…

  • Thatching 2

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    zezuru_mv55g8

    The following requirements apply in regard to thatching- a) the thickness of the thatching shall be not less than 130 millimetres at any part of the roof, and shall consist of not less than two layers of bundles of thatching; b) at eaves the verges, there shall be layer of bundles of thatching additional to…

  • Cut Wooden Shingles2

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    zezuru_mv55g8

    (1) Impregnation and moisture content.- Cut wooden shingles shall be impregnated in accordance with the requirements in accordance with the requirements of S.A.B.S. 448, South African wood shingles for roofs and walls, and shall also conform to the moisture-content clause of that specification. (2) General requirements.- Cut wooden shingles shall comply with the following requirements-…

  • Clay Roofing Tiles

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    zezuru_mv55g8

    (1) Marseilles-pattern and plain-clay roofing tiles shall comply with the requirements of S.A.B.S. 623, Clay roofing tiles. (2) Clay roofing tiles, other than Marseilles-pattern and plain tiles, shall be made accurate to their nominal dimensions with the following tolerances- a. thickness: 2 millimetres(for plain tiles tiles only);b. breadth: ±3 per centum of nominal breadth;c. length:…

  • Concrete Roofing Tiles

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    zezuru_mv55g8

    (1) Materials.- Concrete roofing tiles shall comply with requirements of C.A.S. 187, Concrete roofing tiles. (2) Details requirements.- The following requirements shall be met in regard to the laying and securing of concrete roofing tiles on the roof- a) except as provided for in paragraph (b), the roof-slope shall be not less than- Side-lap End-lap…

  • Slanted Roofing

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    zezuru_mv55g8

    (1) Roof-slates shall be of impermeable fine-grained rock, free from knots and knurls, and of such nature and so located that the durability or weatherproofing of the roof is not adversely affected thereby. (2) Roof-slates shall, in addition, meet the following general requirements- a) every slate shall be of uniform thickness throughout, which shall be…

  • Copper-Sheet Roofing

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    zezuru_mv55g8

    (1) General.- Copper sheets for roofing, including clips, shall be not less than 0,55 millimetres in thickness, and shall be made from hot rolled-sheet of dead-soft temper. (2) Detailed requirements.- Copper sheets for roofing shall be laid on a deck complying with the requirements of paragraph (c) of section 12, except that timber decks may…

  • Aluminium And Aluminium-Alloy Roofing

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    zezuru_mv55g8

    (1) General.- Aluminium and aluminium-alloy roofing shall be protected from any dissimilar metal, and from concrete or mortar on which it may rest, by a layer of suitable bitumen-based or coal-tar pitch-based paint between the contact surfaces or by an insulating material approved by the local authority. (2) Corrugated-aluminium roofing.- Corrugated-aluminium-alloy roofing shall comply with…

  • Galvanized-Steel Roofing1

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    zezuru_mv55g8

    (1) General.- Galvanized-steel roofing-sheets shall be not less than 0,55 millimetre in thickness, and the coating shall comply with the requirements of S.A.B.S. 934, Hot-dip (galvanized) zinc coatings on steel sheet and strip. (2) Corrugated galvanized-steel roofing.- Corrugated galvanized-steel roofing shall comply with the following requirements- a) except as provided for in paragraph (b), the…

  • Asbestos-Cement Decking Units

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    zezuru_mv55g8

    (1) Asbestos-cement decking-units shall comply with the requirements of B.S. 3717. (2) Asbestos-cement decking units shall be laid and fixed to the satisfaction of the local authority.