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Enclosed <br />space under <br />stairs shall <br />have walls <br />and <br />under-stair <br />surface <br />enclosed with <br />1/2" gypsum <br />board Per <br />MNRC <br />R302.7 <br />Provide fire blocking <br />vertically at ceilings and <br />floors, and horizontally <br />at intervals not <br />exceeding 10'. <br />Drain to daylight. <br />Mechanical Ventilation <br />Required In all Toilet Rooms <br />Unprotected portions of floor <br />shall not exceed 80 Sq Ft. <br />3 Studs <br />Beam calcs <br />show this as a <br />2(18") LVL