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 degree to which soluble salts are extracted depends on the quantity of water available and the permeability of the masonry.
Also, because it is completed in one operation, it is less expensive. Transverse bond is obtained by the use of bonders, vs which there should be not less than one in each square metre of each wall surface. If sulfate ground conditions exist, the recommendations of 5. For dated 568-3, subsequent amendments to, or revisions of, any of these publications do not apply. The spacing and width of movement joints to control expansion in such walls is governed by the compressibility of fillers and the performance of appropriate sealants see 5.
Code bd practice for masonry. BSSpecification for ground granulated blastfurnace slag for use with Portland cement. There is little experience of the successful use of any admixture intended to provide frost protection by depressing the freezing point of the mixing water.
Where possible, a 562-3 coping, with weathered top and ample overhang, properly throated, 568-3 preferred see 5. Areas above doors and above or below windows may benefit from being reinforced to distribute tensile stresses see 5.
Particular attention should be paid to jointing. Some particular cases of design to limit the effect of differential movement and yet to provide stability of the panel are described in 5. BSCode of practice for external renderings.
BSSpecification for reconstructed stone masonry units.
BS Part 3 Masonry – Free Download PDF
It is important to ensure that the ashlar is properly bonded and tied in, especially at openings and quoins, and that shear stresses are evenly distributed throughout the component materials. The mm solid walls are of any brick, or blocks of compressive strength not less than 3. Where there is greater than mm of masonry exposed between a DPC and the finished ground level, e.
Protective measures for steel lintels, including provision of DPCs where appropriate, should conform to BS No further treatment is necessary before use.
In particular, calcium chloride, or admixtures based on this salt, can lead to subsequent dampness or corrosion of embedded metals, including wall ties.
BS 5628 Part 3 Masonry
They are used to reduce the reverberation echo or liveliness of a space, but have little effect on the sound transmitted to an adjacent space. At the vertical edges of bz and at vertical unreturned or unbonded edges e. Building defects are the most common cause of water penetration through the building envelope.
Do ba use sand or lime—sand mixtures containing ice particles see also A. 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.
The user is referred to the particular recommendations of any technical approval in this case.
The recommendations be are for finished work; during construction, masonry units, mortar and recently finished work may need protection see BS Brush out the joints to remove dust and loose material and then lightly wet using a brush. This is because the long term moisture movement of both cladding and structure involves shrinkage and thermal expansion of the cladding is 56628-3 only opposing movement.
Thermal insulation Continuous angle Cavity tray Weepholes at a maximum of 1 m intervals horizontally Pistol brick to reduce joint thickness on face Sealant Compressible joint filler Figure 16 — An example of a support system showing provision for movement With cladding of calcium silicate or concrete masonry the differential movement between the cladding and the concrete structure is less.
Where movement joints or edge clearances are required for walls 5682-3 to resist fire, they should be filled with a non-combustible material, such as mineral fibre, which still allows the movement joint to function. Detailed commentaries on the protection afforded by projecting features such as sills, copings, string courses, roof eaves and verges, and on the concentration of surface run-off of rain water by wind are contained in BS Where lintels are used, these should have bearings commensurate with the solidity of the support see 5.
Clay bricks of durability Designation MN are not recommended in this situation. It is important that the specified depth of raking out is achieved throughout the wall, checked 528-3 a suitable depth gauge. Ensure DPCs are in close contact with frames and properly held in position to prevent sagging. Where a structural member bridges a cavity, a vertical DPC should be included between the structural member and the external leaf, and stop ends fitted to any adjacent cavity trays.
Code of practice for plasterboard partitions and dry linings; — Part 9: Horizontal trays, through the thickness of the chimney wall, with an upturn at the inner face of the flue, should be linked with the flashing at the intersection with the roof. If b made with dense sulfate ground conditions exist, the aggregate complying recommendations in 5.
All materials expand and contract in response to thermal changes. Movement joints need not generally exceed 10 mm in width.
NOTE For guidance on the use of flashings and weatherings, see 5. The masonry most vulnerable autoclaved aerated in Ba and A3 is located between mm block see remarks above, and mm below, finished ground in iii level.