Content Page: 5 Masonry and Walling

  • Anchorage To Joisted Timber and Precast Concrete Floors

    —

    (1) Where the joisted timber or precast concrete floors are to be regarded as providing lateral restraint to the supporting-wall at the level of the floor, anchors shall be provided to secure the bearers or joists or flooring-units to the wall at distances apart not greater than 1,8 metres, measured along the wall extending through…

  • End Of Beams And Rafters

    —

    (1) Solid bearing-walls less than 215 millimeters in thickness, and cavity bearing-walls having both leaves not thicker than 100 millimeters each, shall not be broken into, subsequent to being built, for the insertion of beams or rafters, except with the written approval of the local authority. (2) Timber beams and joists supported upon masonry shall…

  • Cornices

    —

    The centre of gravity of every cornice, whether surmounted by masonry or not, shall fall within the middle third of the thickness of the wall below, unless adequate structural support is provided.

  • Overhanging Walls

    —

    Walls may overhang their supports only in the case of a single-storey building or the top storey of a building: Provided that- i) the base of a solid wall or of the leaf of a cavity-wall shall not overhang its support to a total extent greater than one-third of its thickness, whether the overhang occurs…

  • Corbelling

    —

    (1) Walls less than 215 millimetres in thickness shall not be corbelled, nor, in a cavity-wall, shall a leaf less than 215 millimetres in thickness corbelled : Provided that nothing in this section shall be construed as preventing walls overhanging their supports in accordance with the provision of section 22. (2) In a single-storey dwelling-house…

  • Thrust From The Roof

    —

    (1) Where a roof exerts lateral thrust on supporting walls, piers or columns which results wholly or partly from dead, the walls, piers or columns shall be designed in accordance with requirements of sections 63 to 82. (2) If such thrust results from superimposed load only, then no such design shall be necessary on that…

  • Lintels

    —

    (1) Reinforced concrete lintels may:- a) be constructed in accordance with the requirement set out in the Fourth schedule: or b) be proprietary pre-cast lintels of approved manufacture. (2) Lintels of types other than that specified in subsection (1) may be used to the design and construction being approved by the local authority.3 2 Where…

  • Openings, Chases And Recesses

    —

    (1) Lintels and arches over openings2..-The portion of a masonry or concrete wall above an opening shall be provided with a lintel constructed as an arch, and shall comply with requirements as set out in Chapter 3 or section 18. (2) Chases and recesses.- Where horizontal chases or recesses are cut to a depth greater…

  • Use Of Existing Masonry

    —

    (1) an existing masonry wall, pier or column may be used in the construction of a building, and in the repair, alteration or enlargement of a building, if it complies with the requirements of these by-laws. (2) an existing masonry wall which is structurally sound which is of insufficient thickness for its proposed use may…

  • Construction In Cold Weather

    —

    No masonry construction shall take place when the temperature at the site of work is below- a) 2 degrees Celsius at a time when the temperature is rising; or b) 5 degrees Celsius at a time when the temperature is falling.