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R606.3.1.1 Masonry Opening Tolerances

2020 FBC - Residential, 7^th edition > 6 Wall Construction > R606 General Masonry Construction > R606.3 Construction Requirements > R606.3.1 Bed and Head Joints > R606.3.1.1 Masonry Opening Tolerances

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Masonry rough openings may vary in the cross section dimension or elevation dimension specified on the approved plans from - ¹/₄ inch (6.4 mm) to + ¹/₂ inch (12.7 mm). For exterior window and door installation provisions, see Section R609.3.

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R606.3.1.1 Masonry Opening Tolerances