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Mack - keyway joint
BEVELED 1x2 ATTACHED TO FORM BOARD FORM BOARD ° 4 ° °4 a d a a ° FORMBOARD w/ KEY . .. ° a ° n e— 1nTOUR° 2ND POUR n 4 FINISHED KEY FORM KEYWAY IF CONCRETE POUR IS TO BE INTERRUPTED. KEYWAY DESIGN 3