Rebar (Reinforcing Bar)

Concrete is incredibly strong in compression but weak in tension—it can support massive weight but cracks easily when pulled or bent. Rebar solves this problem by embedding steel bars in concrete, creating reinforced concrete that resists both compression and tension. The ribbed surface of rebar creates a mechanical bond with concrete, allowing the two materials to work together. Common sizes range from #3 (3/8-inch diameter) to #6 (3/4-inch diameter) for residential applications.

Why It Matters in Construction

Rebar placement is critical for structural integrity. Foundation walls, footings, slabs, and retaining walls all require properly sized and positioned rebar per engineering specifications. In Denver's expansive clay soils, rebar reinforcement in foundations is especially important to resist soil movement and prevent cracking. Building codes specify minimum rebar sizes, spacing, and placement depth. Proper installation includes maintaining correct coverage (concrete surrounding rebar) and using chairs or supports to keep rebar at the specified height within pours.

Common Applications

• Foundation footings: Continuous horizontal bars near bottom of footing
• Foundation walls: Vertical and horizontal grid pattern
• Concrete slabs: Wire mesh or rebar grid for crack control
• Retaining walls: Engineered placement resisting soil pressure
• Structural columns and beams: Heavy reinforcement for load-bearing elements