Two conditions comprise a concrete slab depression: a construction joint and a control joint. Both conditions feature a concrete floor slab with a minimum 6-inch vertical offset and dowels matching the slab reinforcing. The construction joint includes a continuous keyway and a tool edge with a one-eighth-inch radius on each side of the joint. The control joint includes a sawcut performed within the first twelve hours of the pour alongside a tool edge with a one-eighth-inch radius.
SAWCUT WITHIN FIRST 12 HOURS OF POUR TOOL EDGE WITH 1/8" RADIUS CONCRETE FLOOR SLAB SEE FOOTING AND FOUNDATION PLAN CONCRETE FLOOR SLAB SEE FOOTING AND FOUNDATION PLAN CONTINUOUS KEYWAY TOOL EACH SIDE OF JOINT WITH 1/8" RADIUS DOWELS TO MATCH SLAB REINFORCING DOWELS TO MATCH SLAB REINFORCING CONSTRUCTION JOINT CONTROL JOINT 6" MIN. 6" MIN.
Members view this detail in full resolution, download the CAD files (SVG, PDF), and can adapt it in the built-in CAD editor — export DXF, DWG, or PDF.
Start membership