Civil · L-42RK2

Expansion and Control Joint

Materials

Concrete

Elements

Columns Floors / Slabs Expansion / Control Joints Site / Paving Anchors / Embeds Reinforcing

Connections

Rebar Splice / Development Expansion / Slip Connection

About this detail

Cast-in-place concrete paving and slab details show multiple expansion and control joint configurations. The dowel at the expansion joint incorporates an eighteen-inch long, epoxy-coated number four smooth dowel at twelve inches on center, fitted with a twelve-inch waxed expansion sleeve to prevent bonding. Standard expansion joints feature a three-eighths-inch pre-molded expansion joint filler cut back after the pour, with max one-eighth-inch max tooled edges in the concrete. The caulked expansion joint against a building includes a backing rod and caulking sealant over the pre-molded expansion joint filler. Control joints are detailed as either tooled score joints or saw-cut score joints extending one-quarter of the slab depth at one-eighth-inch or one-quarter-inch widths.

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