Concrete Flatwork (D02)
Flatwork is the most visible concrete on your property – and Utah’s freeze-thaw cycles punish poor installation.
This BidScope guides you through flatwork applications: driveways that must handle vehicle loads and turning forces, patios for outdoor living spaces, sidewalks and walkways for safe passage, garage floors that resist hot tire pickup, and equipment pads for HVAC units and generators.
Learn proper thickness: 4 inches for standard residential slabs and patios, 5-6 inches for driveways and high-traffic areas, 6-8 inches for RV pads and heavy equipment.
Understand base preparation: 4-6 inches of compacted gravel base for drainage and frost protection, proper grading for water runoff.
Master reinforcement options: welded wire mesh (WWM) for crack control, fiber reinforcement mixed into concrete for internal strength, rebar grid for high-stress applications.
Navigate joint placement: control joints every 8-10 feet in both directions to control cracking, expansion joints at building connections and where different pours meet, isolation joints around obstacles.
Know concrete specifications: 4,000 PSI minimum for exterior flatwork exposed to freeze-thaw, 5-6 inch slump for finishing workability, 5-7% air entrainment critical for Utah winters.
Learn finish options: broom finish for traction, smooth trowel for garage floors, exposed aggregate for decorative appearance, salt finish for subtle texture.
Understand slope requirements (1/8 to 1/4 inch per foot minimum) for drainage.
Plan for proper curing especially in hot dry Utah summers.
This tool ensures your flatwork looks great and lasts decades.
What’s Included:
- Flatwork applications (driveways, patios, sidewalks, garage floors, equipment pads)
- Driveway specifications and vehicle load requirements
- Turning radius considerations for driveways
- Patio design and sizing
- Sidewalk width standards (typically 4-5 feet)
- Garage floor requirements (smooth finish, crack resistance)
- Equipment pad sizing for HVAC, generators, hot tubs
- Thickness requirements (4 inches standard, 5-6 inches driveways, 6-8 inches RV pads)
- Base preparation (4-6 inches compacted gravel)
- Gravel base specifications (3/4-inch crushed rock)
- Base compaction requirements
- Subgrade preparation and compaction
- Vapor barrier under slabs (6-mil polyethylene)
- Edge forms and screeding
- Reinforcement options (welded wire mesh, fiber reinforcement, rebar)
- WWM sizing and placement (6×6 W1.4xW1.4 typical)
- Fiber reinforcement benefits and dosage
- Rebar grid for heavy-duty applications
- Control joint spacing (8-10 feet both directions)
- Control joint cutting (1/4 depth of slab)
- Expansion joints at building connections
- Isolation joints around columns and obstacles
- Concrete specifications (4,000 PSI minimum for freeze-thaw exposure)
- Slump for finishing (5-6 inches)
- Air entrainment 5-7% for Utah freeze-thaw
- Finish options (broom, smooth trowel, exposed aggregate, salt finish)
- Broom finish for traction and safety
- Smooth trowel for garage floors
- Exposed aggregate appearance and durability
- Slope requirements for drainage (1/8 to 1/4 inch per foot)
- Curing procedures in hot weather
- Curing compounds and moisture retention
- Sealing recommendations (acrylic vs penetrating sealers)
- Cold weather concreting limitations
- Cost factors (thickness, finish, reinforcement)
- Pricing per square foot by application
- Repair and replacement considerations
