Lintel Design Manual
Because this lintel may be supporting unreinforced masonry, the code requires that the deflection of the lintel be limited to l/600 or 0.3 in., whichever is less.
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Steel Lintels should be installed with a minimum end bearing of 150mm, bedded on mortar and levelled along its length and across its width. The masonry above the lintel should be built in accordance with