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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At the time of publication of BS Particular attention should be paid to jointing.
In addition, clay materials undergo an irreversible expansion after their manufacture as moisture is adsorbed from the atmosphere. For dated references, subsequent amendments to, or revisions of, any of these publications do not apply. For each type of wall, in any particular building, the most exposed part should be given particular attention as this will affect decisions concerning the choice of design and materials.
In general, the risers should be not more than mm in height and stretchers should not exceed two-thirds the heights of the adjoining riser. Higher levels of accuracy may need to be specified where such components or finishes are to be installed.
Dimensions in millimetres 5682-3 not create ledges here with the DPC preferred Either flush or projecting slightly Finished ground level Figure A. 5268-3 minor arches of segmental, parabolic or semi-circular form up to about 2 m span can be proportioned empirically, provided care is taken to ensure that there hs an adequate amount of masonry over the arch ring and between it and any line of floor loads.
Rainfall varies considerably across the country and is largely unaffected by local features. Code of practice for excavation and filling; — Part 2: Concrete and calcium silicate masonry should not be tied rigidly to the frame, but adequate lateral restraint should be provided. Conversely, the wind speed is affected significantly by local features such as the spacing and height of neighbouring trees and buildings and whether the ground is vs or steeply rising.
NOTE 3 Both Portland blastfurnace cements and Portland pulverized-fuel ash cements may be produced by weigh batching and blending at a mixer, using cement conforming to BS 12, blastfurnace slag to BS or pulverized fuel ash to BS DPCs projecting into cavities provide a place for debris to lodge. It should not be quoted as though it were a specification and particular care should be taken to ensure that claims of compliance are not misleading.
The foam should have small cells or a surface skin. Timber wall plates should not be built into any wall. Table 2 gives recommendations for the selection of wall ties with regard to severity of exposure.
Alternatively, a system of overlapping pre-formed trays can be installed to collect and discharge water from the cavity see Figure In contrast, rain falling on a wall of low water absorption units raincoat effect will run down over the glass-like surface to penetrate any imperfections in the jointing.
Where hollow blocks are used in external walls, the use of shell bedding can reduce rain penetration. Arch construction is less suitable for the external skins of cavity walls than for solid walling of greater thickness because of the added be of damp-proofing the junctions between inner and outer skin. Examples of such features are: When used as a cavity tray, can be difficult to hold in place and may need bedding in mastic for the full thickness of the outer leaf, to prevent 528-3 penetration.
BS 5628 Part 3 Masonry
Where FN clay units are used in F2, sulfate-resisting cement should be d most types of used see 5. Hand-mix mortar on a clean watertight platform.
Where for aesthetic or other reasons a capping see 3. The right type of mix, thickness and number of coats should be selected and the wall should be detailed correctly.
Leave datum level points in position so that a gauge rod can be used for coursing other heights such as openings, storeys and string courses see A. Table 12 — Single-leaf masonry — Recommended thickness of masonry for different types of construction and categories of exposure Type of masonry Maximum recommended exposure zone from Table 11 for each construction Minimum constructional thicknessa Unrendered mm Clay or calcium silicate Dense concrete Lightweight concrete 90 90 90 a Not recommended 1 1 2 Not recommended 1 1 1 2 Not recommended Not recommended Not recommended for blocks with open surface texture 1 2 Rendered in accordance with BS Externally insulated Impervious cladding 1 2 3 3 1 2 3 3 3 1 2 3 3 3 3 3 3 3 3 3 3 3 3 3 4 4 4 4 4 4 4 4 4 4 4 4 3 3 3 3 4 4 Based on work sizes and excluding render thickness.
BS Part 3 Masonry – Free Download PDF
DPC under coping DPC stepped away from roof level Weepholes 56288-3 23 — Cavity parapet walls Particular care is necessary in the bd and formation of joints in cavity trays in parapet walls see 5.
Connections of other elements with the walls should be sufficient so as to transmit all vertical and lateral loads safely to the foundations. Code of practice for carpentry, joinery and general fixings; — Part 6: With regard to rain resistance a waterproof cladding system as listed in 5.