![]() ![]() The course shall extend for at least 20 cm beyond the opening on either side. Provisions for Door and Window Frames in Concrete Block MasonryĪ solid concrete block masonry course shall be provided under door and window openings (or a 10 cm thick precast concrete sill block under windows). Care must be taken during construction to ensure that the edges of the blocks are not damaged.Ĥ.For battered faces, bedding shall be at right angles to the face unless otherwise directed.Precast half-length closers (and not cut from full-size blocks) shall be used. ![]() The concrete blocks shall break joints with those above and below for not less than a quarter of their length.All the concrete block courses shall be laid truly horizontal, and all vertical joints made truly vertical.Mortar shall be spread over the top surface of the previous course, creating a uniform layer with a minimum thickness of 10mm and not exceeding 12mm. ![]()
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