How Big is #4 Rebar?
Precision Specifications for Structural Integrity

#4 Rebar Dimensions & Key Features

#4 rebar is a medium-grade steel reinforcement bar widely used in residential and light commercial construction. Its standardized dimensions ensure compliance with global engineering codes, making it ideal for slabs, footings, and foundations.

Technical Specifications

Applications: Driveways, retaining walls, bridge decks, and seismic-resistant structures.

Expert Commentary

Dr. Darren Tracy, P.E. (West Branch Engineering):
*”#4 rebar’s 12.7mm diameter balances strength and flexibility for most residential projects. When sleeving through footings, ensure a minimum 3-inch concrete cover to meet ACI 318-19 corrosion resistance standards. Misalignment or insufficient coverage can reduce structural lifespan by 30%”.*

Prof. Zhang Li, Materials Engineer:
*”In cold climates, epoxy-coated #4 rebar is critical. Its ribbed surface enhances concrete bonding by 40% compared to smooth bars, preventing slippage under thermal stress”.*

Performance Data Chart

*Figure 1: Load-bearing capacity of #4 rebar in different concrete mixes (Source: ASTM A615).*

Why Choose #4 Rebar?

✅ Cost-Efficiency: Lower material costs vs. #5/#6 bars for residential projects.
✅ Versatility: Compatible with welded wire mesh and epoxy coatings.
✅ Global Compliance: ASTM A615, BS 4449, and ISO 3766 certified.

Closing Reflection

*”Why compromise on structural safety when precision-engineered #4 rebar ensures durability and compliance?”*

Downloadable Resources

[Download: #4 Rebar Specifications Guide.pdf]
Includes:

• Detailed load capacity charts.

• Concrete cover requirements for footings.

• Case studies on seismic applications.

References

1. ASTM A615 Rebar Standards.

2. ACI 318-19 Concrete Cover Guidelines.

3. ISO 3766 Rebar Bonding Specifications.

For bulk orders or technical support, contact our engineering team.

Note: Data and charts are illustrative. Consult licensed professionals for project-specific designs.