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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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They should extend about two-thirds into the wall; headers extending through the full 5628- of the wall are not recommended as they tend to permit damp-penetration.

BS Part 3 Masonry – Free Download PDF

Over-wetting of any bricks can cause efflorescence or lime staining. The tray should step down by 5268-3 minimum of mm towards the outer leaf and weepholes. As cement content is reduced, strength is reduced, but such mortars are more able to accommodate minor movements of the masonry. Movement control joints in masonry should be carried through any coping or capping see 5.

A corbelled feature work may gs built with restraint fixings subject to structural engineering design. At the same time, fill any spaces left between the stones of the two wall faces with core stones carefully chosen to bond in with the remainder.

Certain single-part, moisture cured sealants are best used in joints of small cross-section due to their excessive curing time in thick sections.

If soluble salts are present, gs as for lead Easily worked to required shape but this is a slow process.

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No specific recommendations for the use of random rubble walling are given, the methods of construction and appearance of which will vary locally 56228-3 to the type of stone available and traditional practice. Where a mortar designation richer than the minimum Designation recommended for durability in Table 13 is required for structural reasons, careful consideration should be given to the accommodation of movement see 5.

However, in practice, some partially filled joints are unlikely to lead to a 56628-3 reduction in performance.

BSSpecification for steel windows, sills, window boards and doors. Insulation may be positioned externally, internally or within any cavity.

NOTE Commentary text is printed in italics. Unless there is a gutter to collect it, or a projecting sill to throw it clear, excessive wetting and possible water penetration can occur hs any masonry below.

Because of this incomplete situation this standard makes reference to neither ENs nor harmonized ENs for masonry products. Information on performance of individual materials currently used for DPCs is provided in Table 3.

This can significantly affect the appearance of walling. Table 2 gives recommendations for the selection of wall ties with regard to severity of exposure. However, it is expected that: NOTE 2 Table 13 provides information regarding the durability of masonry in finished construction.

BSSpecification for zinc alloy sheet and strip for building. Draw battens should be used as a means of keeping the cavity clear of mortar and debris since anything that bridges the cavity can lead to damp patches appearing on the inner face of the wall.

BS 5628-3:2005

BSSpecification for polyurethane PUR foam systems suitable for stabilization and thermal insulation of cavity walls with masonry or ba inner and outer leaves. All materials expand and contract in response to thermal changes. BSSelection of construction sealants — Guide.

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Handle prepacked masonry units with wrapping and banding in place unless it is not bw to do so. Sliding anchor restraint fittings are available see Figure 17 for a typical example. The purpose of BS is to encourage good workmanship by providing the following. Alternatively, the surfaces to be bedded can be wetted just sufficiently to reduce the suction by briefly dipping in water.

Joints in the length of the flashing should be welted, sealed or adequately overlapped.

BS 5628 Part 3 Masonry

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 The cavity tray over the opening should overlap the vertical DPCs at the jambs to ensure continuity of damp-proof measures see Figure BS permits variation in the dimensions of clay bricks. It is strongly recommended that parapets and chimneys should be protected by copings and DPCs see 5.

Arrange deliveries so that the materials do not arrive at site too early and that excessively large quantities are not delivered at one time. The cavity tray should step down or slope across the cavity not less than mm towards the external leaf and, preferably, terminate in a small drip on the face of the wall.