BS Incorporating Corrigendum No. 1. 1 31 January See Committees responsible for this British Standard The. BS Code of practice for the use of masonry – Part 3: Materials and components, design and workmanship. amendments of BS Parts 1, 2 and 3 ‘Code of Practice for Use of Masonry’. Mortar Testing. All test cubes shall be made and tested in accordance with.
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The sound insulation of a single-leaf masonry wall is largely related to its mass per unit area, provided that there are no direct air paths through it. Examples of such features are: If soluble salts are present, protected as for lead Easily worked to required shape but this is a slow process. Where several consignments will be delivered to site over a long period of time, blending on site may not solve the problem of colour variation between consignments.
The structural design of masonry should be in accordance with the recommendations of BS and -2, and for low-rise buildings should be in accordance with the recommendations of BS Class 1 aggregates for concrete blocks include limestone, air-cooled blastfurnace slag, foamed or expanded slag, crushed brick, well-burnt clinker, expanded clay or shale, sintered pulverized-fuel ash and pumice.
Where their use is unavoidable, panels of slips should be isolated from movement and stresses in adjoining masonry. The joints in a sill are 56283 source of weakness. The right type of mix, thickness and number of coats should be selected and the wall should be detailed correctly.
Sliding anchor restraint fittings are available see Figure 17 for a typical example.
With regard to rain resistance a waterproof cladding system as listed 568-3 5. For design aspects of masonry, reference should be made to BS Where no instructions are given, a minimum lap of mm should be used. The recommendations set out in Bw should be followed. Lintels should not bear on a short length of cut block.
Concrete roofs should have a bearing of not less than 90 mm; however, this bearing may be reduced at the discretion of the designer provided relevant factors such as loading, span, tolerances, height of support and the provision of continuity reinforcement should be taken into account.
BS Part 3 Masonry – Free Download PDF
Guidance on the selection of sealants is given in BS Where Designation iv mortar is used it is essential to ensure that all masonry units, mortar and masonry under construction are 56228-3 fully from saturation and freezing see A.
Check the positions of the main features, such as quoins, door jambs, etc. Within each Designation, mixes produce mortars bbs approximately equal strength and durability. Where clay brick masonry is used in situations in which it can become saturated and exposed to cyclic frost action, the frost resistant category F specified in BS Keep the cavity and ties free from mortar and debris.
The sealant should be applied against a firm backing so that it is forced against the sides of the joint under sufficient pressure to ensure good adhesion. However, certain rectangular walls and gables in buildings up to and 528-3 four storeys high may be proportioned as in Table 9, subject to the following conditions. The design should take into account the choice of masonry units and mortar in the following and similar situations where masonry is likely to become and can remain substantially wet for long periods of time.
Bd guidance, see BS Proprietary devices may be installed to form weepholes. Code of practice for concrete work. This is more likely to happen with masonry units of high water absorbency. It is not practicable to proportion accurately on 55628-3 unless all materials are batched by weight.
Table 12 shows the recommended minimum thicknesses for both rendered and unrendered single-leaf walls for various categories of exposure as defined in Table For detailed recommendations, designers vs directed to BS Code of practice for plastering and rendering; — Part NOTE Empirical guidance on maximum height and minimum foundation width of brick or block masonry free-standing walls is given in .
This is because the long term moisture movement of both cladding and structure involves shrinkage and thermal expansion of the cladding is the only opposing movement. If screws are used a minimum of four screws is necessary at least 528-3 of which is to be gs within mm of the bottom end of the strap a Flat roof Each rafter anchored to wall plate with framing anchor, clip or nail Strap to have a straight length of at least 1 m and be either screwed to face of masonry, or have a tail built into a masonry bed joint.
BS 5628 Part 3 Masonry
In such cases, consideration should be given to using sands having a bx distribution towards the coarser end of hs BS and grading envelope. BSSpecification for reconstructed stone masonry units. BSMethods of test for water for making concrete including notes on the suitability of the water. Overlap joints in DPCs to a minimum of mm and seal with an appropriate jointing compound; b securely fix trays across the cavity, stepping up towards the inner leaf.
Specialist tie manufacturers should be consulted if mm long double triangle format ties are needed for 91 mm to mm cavities. In these situations consideration should be given to the use of strong mortar mixes using Portland cement or sulfate-resisting Portland cement.
For panel walls which are to provide fire resistance where edge isolation is bss, special consideration should be given to the edge details. Effectiveness of stress relieving of cold formed components to 5628-33 tested by the supplier using the mercurous nitrate test described in BS EN ISO At least two weepholes above the tray at the front edge should be provided.
The designer may vary the length in particular circumstances, provided that the design recommendations continue to be met. Avoid intermix and contamination from other building materials, debris or other deleterious material.