Structural · S-E9ZB9

Concrete Slab and Column Joints Supporting CMU Walls

Materials

Elements

Columns Walls Floors / Slabs Expansion / Control Joints

About this detail

These structural details illustrate concrete slab junctions adjacent to walls, supporting concrete masonry unit walls, and column isolation joints. The slab adjacent to the wall features a keyed joint with straight reinforcing bars on both sides, requiring number four bars at eighteen inches minimum at mid-depth unless otherwise noted, alongside dowels spaced at eighteen inches. The detail supporting concrete masonry includes continuous bottom and top reinforcement consisting of two number five bars, with dowels tied into standard masonry details. The isolation joint detail at the column incorporates a concrete or steel column with concrete encasement, a four-inch clearance, number four edge bars, and form isolation joints with control joints infilling after forms are removed. The structural slab adjacent condition utilizes number four reinforcing bars at four feet zero inches spaced at sixteen inches top minimum, and number four bars at ten feet zero inches spaced at twelve inches bottom.

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