Abstract: An apparatus for cutting grooves in a green concrete slab having at least one terminating side edge transverse to a broad top surface in a low cost manner is described and includes the following elements: a hand-held portable rotary saw, supported on a rollable platform disconnectably connected to and supporting the relative to the green concrete slab. The rollable platform includes a planar base in surface contact with a conventional guide plate of the saw, and flared side walls extending outwardly from the planar base an anchoring portion adapted to receive a human-generated force to provide rectilinear travel along a preselected direction over the green concrete slab. The planar base also includes a slot in alignment with an opening in the guide plate through which the saw blade extends whereby a working plane of reference is defined that intersects an axis of rotation of the saw blade whereby a maximum depth of cut is easily defined coincident with the working plane of reference.

Abstract: An apparatus for cutting grooves in a green concrete slab having at least one terminating side edge transverse to a broad top surface in a low cost manner is described and includes the following elements: a hand-held portable rotary saw, supported on a rollable platform disconnectably connected to and supporting the relative to the green concrete slab. The rollable platform includes a planar base in surface contact with a conventional guide plate of the saw, and flared side walls extending outwardly from the planar base an anchoring portion adapted to receive a human-generated force to provide rectilinear travel along a preselected direction over the green concrete slab. The planar base also includes a slot in alignment with an opening in the guide plate through which the saw blade extends whereby a working plane of reference is defined that intersects an axis of rotation of the saw blade whereby a maximum depth of cut is easily defined coincident with the working plane of reference.