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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BSTimber for and workmanship in joinery — Part 2: The cavity tray over the opening should overlap the vertical DPCs at the jambs to ensure continuity of damp-proof measures see Figure The choice of the type of tie and spacing depends on the cavity width. Where face insulated blocks are used the cavity width should be measured from the face of the concrete. The design should follow the recommendations given in BS This can be difficult to achieve in arches see 5.
Ties should be evenly distributed over the wall area, except around openings, and preferably should be staggered. They should extend about two-thirds into the wall; headers extending through the full thickness of the wall are not recommended as they tend to permit damp-penetration. The degree to which masonry, used below DPCs at or near ground level, becomes saturated will vary according to the site. Use mechanical handling equipment where practicable.
Alternatively, the benefits of air-entrainment can be obtained by the use of air-entrained cement: Bonds that do not conform to this criterion, e.
In addition, follow these recommendations for flexible materials. BSWorkmanship on building sites — Part Examine marks, labels and the condition of materials and components and report any discrepancies to the supplier immediately.
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. 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.
Fit dowels and cramps as the work proceeds. In general, a machine mixing time of 3 min to 5 min after all the constituents have been added should be sufficient.
The use of 6528-3 coping is BS or BS ; or preferable. Mortars incorporating both lime and air-entrainment can be used with any sands within the BS and gradings.
BSLoading for buildings — Part 3: Build the front part of the wall to a height of not more than mm, raise the back part to approximately the same level using as far as possible stones that are broad on bed and which tail-in well with the front portion. This can affect the choice of materials including insulation see 5.
If masonry cladding is built-in tightly between horizontal beams or floor slabs, these opposing movements can cause excessive stresses in the masonry, particularly if there is eccentricity, e. The designer should ensure that the construction selected does not conflict with other recommendations of this code. Fill all frogs with mortar where advised.
Cavity tray overlaps in front of the vertical DPC. Specification for laminated board for general purposes.
Direct air paths around the separating wall or floor should be avoided. DPC under coping DPC stepped away from roof level Weepholes Figure 23 — Cavity parapet walls Particular care is necessary in the specification and formation of joints in cavity trays in parapet walls see 5.
If soluble salts are present, protected as for lead Easily worked to required shape but this is a slow process. Care should be taken to avoid air paths in floors which penetrate separating walls. The mortar used for pointing should have similar characteristics to those used in the bedding mortar. Where anticipated movements are different in magnitude and nature, parts of masonry of different material type should be effectively separated, e.
NOTE For guidance on use see 5. Table 1 — Materials for metal support and restraint components and recommended protection levels Durability category Base material Form A Hot-dip galvanized low carbon steel Sheet B Low carbon steel Strip C Low carbon steel Strip a Grade and standard that should be conformed to Protective measures to be carried out after fabrication All external cut edges to be protected using a one-pack chemical resistant paint conforming to HF1A to HF2F in part 4 of Table 4H of BS These restrictions avoid the risk of attack by run-off from limestone and concrete, respectively.
BSThermal insulation of cavity walls using man-made mineral fibre batts slabs — Part 1: 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.
Keep cement stored on site to a practical minimum. Temperature variations can be reduced 56283- providing external insulation or reflective coatings to the roof. The design and positioning of movement joints and slip planes should be carefully considered, to ensure that in addition to accommodating movements, such joints or planes do not impair the stability of the wall or any of its functions.
Code of practice for plasterboard partitions and dry linings; — Part 9: Bonds which have headers in the pattern are intended for work with a minimum thickness of one brick length. The overall dimensions of walls 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.
BS Part 3 Masonry – Free Download PDF
They are produced for use in masonry and similar applications. Such sands can be found among those conforming to grade M of BS Code of practice for masonry A. Information on performance of individual materials currently used for DPCs is provided in Table 3.