This concrete wall construction joint details the connection between a first and second pour utilizing a keyed interface. A one-and-a-half-inch keyway runs vertically through the joint, supplemented by twelve-inch long keys spaced at twenty-four inches on center, with two rows of keys required where the wall thickness exceeds sixteen inches. Typical horizontal wall reinforcement continues across the joint, with equal spacing maintained within the wall thickness dimension "T". The joint surface must be cleaned prior to placing concrete for the second pour.
FIRST POUR TYPICAL HORIZ WALL REINF CLEAN SURFACE PRIOR TO PLACING CONCRETE 12" LONG KEY @ 24" (2 ROWS OF KEYS WHERE WALL IS THICKER THAN 16") EQ EQ EQ CONC WALL "T" 3" 3" 1 1/2" KEY SECOND POUR
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