ALL SHEETING, CLEATS, AND BRACING TO REMAIN SHALL BE PRESSURE TREATED LUMBERSIZED IN ACCORDANCE WITH TABLES 19-1 AND 19-2 OF THE NEW YORK CITY BUILDING CODE. AT CONTRACTORS OPTING AND RISK, LOUVERS AND BLOCKING IN LAGGING MAY BEELIMINATED. LAGGING BOARDS MUST BE IN FULL CONTRACT AND CONTRACTOR TO ENSURETHAT NO SOIL IS LOST DURING LAGGING WORK.