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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Reinforcement for non-structural use should be appropriate to the category given in Table 2.

BS 5628-3:2005

5628- From the description of the raincoat effect and the overcoat effect see 5. The filler material should not react with or adhere to the sealant. Over-wetting of any bricks can cause efflorescence or lime staining.

A microscopic labyrinth of voids exists at the interface because of the physical nature of mortar bonding.

Mortars incorporating both lime and air-entrainment can be used with any 56628-3 within the BS and gradings. These thicknesses may be reduced to mm for walls built with cellular bricks. Stack small quantities of cement and hydrated lime intended for immediate use, if not stored in a shed or building, on a timber platform, well clear of the ground.

Masonry is not completely free to expand or contract because restraints are often present, and thus compressive or tensile forces can develop and these can lead to bowing or cracking.

If it is necessary to accommodate differential sliding movement between the units on either side of it, the mortar bed should be trowelled smooth, allowed to set, and then cleaned off before the DPC is laid. Because of this incomplete situation this standard makes reference to neither ENs nor harmonized ENs for masonry products.

BS 5628 Part 3 Masonry

The overall dimensions of 562-3 and the positions and sizes of openings and piers should be chosen bearing in mind the dimensions of the type of unit specified and the dimensions of special units available. Code of practice for slating and tiling of roofs and claddings; — Part 7: Vertically align the perpend joints in fair faced work.


In such cases more durable masonry units and mortar should be selected, and this can in turn govern the choice for the whole building. However, they can also reduce the rate of evaporation of any water from the wall and so the moisture content of the wall can increase.

BSSpecification for ready-mixed building mortars. Where a column, or other structural member, obstructs the cavity of a wall, the cavity tray should be continuous around the member.

If the required fire resistance of a loadbearing cavity wall with a thickness taken from Table 15 is more than 2 h, the imposed load should be shared by both leaves; otherwise, if the imposed load is carried by the exposed leaf 562-3, the minimum thickness of the exposed leaf should be that given for loadbearing single-leaf walls. Steel frame structures are not subject to shrinkage movement and so vertical differential movement is due only to thermal and moisture movements of the cladding.

Examples of architectural features leading to increased local exposure are: Sound absorbent materials reflect only a small proportion of the incident sound energy arriving at their surface, but dissipate a substantial amount as heat.

BSSpecification for zinc alloy sheet and strip for building. In extreme cases this can cause saturation sufficient to place clay bricks of ML and MN durability Designation at risk of 5628-33 damage. BSSpecification for ground granulated blastfurnace slag for use with Portland cement.

DPCs of clay units 568-3 unlikely to be suitable for walls of other masonry units, as differential movement can occur see 5. Sill materials should conform to the British Standards given in Table 4. It may be desirable to provide a wall plate in certain cases. The space for full-fill insulation should be of a minimum target width of 50 mm, but the risk of rain penetration will be reduced by specifying a wider cavity.


Sliding anchor restraint 5682-3 are available see Figure 17 for a typical example.

BS Part 3 Masonry – Free Download PDF

Check materials for deterioration when taken out of storage and discard if lumpy. Prescriptive rules for 55628-3, and a model calculation, are given in DD Of the various mixes recommended for 56283 mortars of each designation those incorporating lime in their composition show an improvement in bond development.

When an internal wall or partition is to be plastered, a thickness of not more than 5682-3 mm of plaster to one or both sides of the partition should be included when determining the thickness of the wall 5268-3 design in accordance with Figure 6. Earth retaining walls are particularly susceptible to saturation from retained ground in wet weather conditions. Pressed steel lintels should have a bearing of not less than mm in length and may need stiffening over the bearing length to resist the total load.

Securely fix any datum and profile marks. However, weathering detail may not protect walls in conditions of Very Severe driving rain see 5. Then add further water and mix to achieve the required workability. Recessed joints also reduce the width of the mortar joints. Lay reinforcement in the mortar as follows and complete joints to the normal thickness. Cementitious levelling screeds and wearing screeds — Code of practice; — Part

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