BS 5628-3 PDF

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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BS Part 3 Masonry – Free Download PDF

Where masonry is likely to remain wet for long periods of time, e. It may be 5682-3 to safely carry lightweight masonry units higher than 1. Improved workability of mortars containing less cement can be achieved by 562-3 of lime, plasticizers or entrained air or any combination of these. In hot weather the prescribed retardation time may be shortened. Where assessment produces an index near the borderline between categories the designer should decide which is the most appropriate category for the particular case, using local knowledge and experience.

As cement content is reduced, strength is reduced, but such mortars are more able to ns minor movements of the masonry. Proportions should be consistent from batch to batch of mortar. Sill materials should conform to the British Standards given in Table 4. Code of practice for hot and cold water services domestic scale ; — Part If joints and junctions are not sealed, the flow bbs water from above can penetrate through the joints and give rise to costly and inconvenient remedial work.

Direct air paths around the separating wall or floor should be avoided. Code of practice for masonry chimneys and flue pipes.


It is worthwhile 562-83 the problem before deliveries begin and consulting the manufacturer. The masonry may be tied to the frame and designed to move with it by permitting limited rotation at the DPC at the base of the wall.

The stiffness and stability should be derived from one or more of the following, depending upon the type of masonry: The application of waterproofing treatments to the rear face of the masonry in contact with the retained ground will avoid such problems. Table 12 shows the recommended minimum thicknesses for both rendered and unrendered single-leaf walls for various categories of exposure as defined in Table Cavities at the base of the wall should be kept clear.

BS 5628-3:2005

They may be designed to drain the cavity but prevent the ingress of wind-driven rain. In conditions of Severe or Very Severe categories of exposure as defined in Table 11consideration bz be given to the use of wider cavities. NOTE 1 Binders or other beams giving rise to concentrated loads on the wall may need to be provided with a padstone or spreader beam see 5. Bed at least one further course of units on mortar on the DPC. If screws 55628-3 used, a minimum of four bw is necessary, at least one of which is to be located within mm of the botttom end of the strap b Pitched roof NOTE Vertical restraint straps as detailed in a or b should be provided at centres not exceeding 2 m, but each trussed rafter should be fixed to the wall plate.

BS 5628 Part 3 Masonry

Rainfall varies considerably across the country and is largely unaffected by local features. NOTE 1 A variety of metal components is available to tie and provide restraint for masonry cladding.


Materials and components, design and workmanship. Code of practice for masonry; — Part 4: In particular, calcium chloride, or admixtures based on this salt, bx lead to subsequent dampness or corrosion of embedded metals, including wall ties.

Keep the cavity and ties free from mortar and debris. The following factors affect the susceptibility of the masonry to damage.

In addition, clay materials undergo an irreversible expansion after their manufacture as moisture is adsorbed from the atmosphere. The cavity tray should be supported by fine concrete fill in the base of the cavity, or by pre-formed in-fill units, in order to reduce stresses on the cavity tray and its joints.

Where joists are supported by a sound separating wall, they should be supported on joist hangers and not built into the wall. However, where water is moving in a downwards direction, the joints in the DPC should be sealed.

Installation should follow the recommendations of the manufacturers. They are especially useful for plasters and rendering mortars. Structure borne sound can originate from impact on a surface or from airborne sound impinging on the surface of the structure. For the selection of a sealant for use with a particular type of natural stone, the sealant manufacturer should be consulted to avoid problems such as migration staining. The local annual index is intended for use when considering the average moisture content of exposed building material or when assessing durability, the effects of the weather on the appearance of materials and components and the likely growth of mosses and lichens.