Concrete Curbs and Gutters

Applicable City of Toronto work follows TS 3.50 and TS 1350 requirements. Exterior curb concrete is commonly CSA Class C-2, 32 MPa, with a maximum 0.45 water-to-cementing-material ratio and air content suited to aggregate size. Harrowgate confirms the current contract revision, municipal amendments, and specified testing before placement.

Slipforming is efficient for long, accessible runs with consistent section and geometry. Fixed forms are better for short runs, tight radii, catchbasin transitions, depressed crossings, complex reinforcement, and repairs. Harrowgate selects the method by quantity, access, profile, section changes, finish, and the need to maintain exact drainage elevations.

We coordinate design elevations at high points, low points, catchbasins, entrances, and pavement tie-ins, then establish protected survey control. Base grade, form or stringline, and fresh concrete are checked independently. Finishers preserve the machine or form profile, and Harrowgate reviews the completed flow line before adjacent paving hides corrections.

Concrete shrinks and responds to temperature. Contraction joints create planned crack locations, expansion or isolation joints separate selected fixed objects, and construction joints terminate a placement. Harrowgate installs each type at the specified spacing and location, with particular attention to catchbasins, returns, section changes, and adjoining concrete pavement joints.

Timing depends on achieved concrete strength, curing, backfill support, paving equipment loads, and the project specification. Harrowgate protects the curb face and corners, compacts adjacent material without displacement, and releases paving only when rollers, trucks, and screeds can work without rotating, cracking, or marking the curb.

Yes. Harrowgate sawcuts defined limits, removes the failed section without bruising retained ends, corrects base and drainage causes, installs dowels or joints as detailed, and matches line, grade, section, and finish. Traffic is phased around the repair until curing and strength criteria permit reopening.

The grading and accessibility details establish curb transition length, depressed elevation, sidewalk slope, road drainage, tactile walking surface, and landing geometry. Harrowgate sets these elements from shared survey control and coordinates concrete sequences so no lip, ponding area, or abrupt crossfall is created at the crossing.