SUSTAINABILITY GUIDANCE FOR STEEL JOISTS & STEEL DECK

Sustainability Guidance for Steel Joists and Steel Deck 

October 19, 2026 

To: Owners, Contractors, and Design Professionals 

Subject: Sustainability Considerations for Open-Web Steel Joists, Joist Girders, and Steel Roof and Floor Deck

This letter provides compiled guidance for evaluating and documenting the sustainability of open-web steel joists, joist girders, and steel roof and floor deck. These products can support lower-impact construction through material efficiency, high recycled content, durability, recoverability, and established environmental reporting. Their sustainability should nevertheless be assessed at the project level using current, product-specific documentation rather than broad material claims alone. 

Summary of Sustainability Attributes 

• Material efficiency: Open-web joists and profiled deck use steel where it is structurally effective, providing high strength with comparatively low weight. Efficient member selection can reduce steel tonnage, supporting framing demand, transportation impacts, and foundation resources. 

• Recycled content and circularity: Steel is repeatedly recyclable without an inherent loss of material quality. The Steel Joist Institute reports that more than 85% of the steel used in North American joist production comes through recycling, while the Steel Deck Institute cites a steel recycling rate of approximately 90%. 

• Construction efficiency: Shop fabrication, standardized profiles, nesting of deck sheets, and rapid field erection can reduce jobsite cutting, packaging, handling, and waste. Open webs also provide pathways for building services, which may reduce secondary framing or field modification when coordination occurs early. 

• Durability and service life: Properly specified coatings, drainage, detailing, ventilation, and maintenance can extend service life and reduce replacement impacts. Exposure conditions must drive corrosion-protection decisions. 

• End-of-life value: There is a strong incentive to recycle steel due to its high value in the scrap market.  

• Transparency: Industry-average and manufacturer-specific Environmental Product Declarations (EPDs) are available for joists and deck. EPDs provide standardized life-cycle information, but they do not by themselves certify that a product meets a sustainability threshold. EPDs are useful for early design and benchmarking, while manufacturer- or facility-specific EPDs may better support procurement decisions. Collect final EPDs, mill or manufacturer declarations, quantities, waste records, substitutions, and maintenance recommendations, so the owner has a defensible record of project outcomes. 

Recommended Project Guidance 

1. Establish measurable objectives: Define whether the project is prioritizing embodied-carbon reduction, recycled content, waste diversion, responsible sourcing, material reuse, green-building certification, or a combination of these goals. 

2. Request current environmental documentation: Require applicable product-specific or industry-average EPDs, recycled-content information, manufacturing location, mill source, and coating information. Confirm the EPD’s declared unit, and issue date. 

3. Compare like with like: Do not compare global-warming-potential values unless the products use equivalent functional or declared units, life-cycle stages, product category rules, and performance assumptions. Evaluate the complete assembly required quantity, and end of life disposal, not merely impact per ton. 

4. Optimize the structural system: Coordinate bay spacing, joist depth, deck profile, span, loading, vibration, fire resistance, acoustics, ponding, diaphragm demands, and MEP routing. The lowest-impact solution is commonly the one that meets performance requirements with the least total material and avoids field rework. 

5. Avoid unsupported prescriptive limits: Recycled-content percentages alone may not predict embodied carbon. When carbon reduction is a project objective, use verified EPD data and project-specific quantities rather than marketing statements. 

6. Plan procurement and logistics: Favor qualified regional supply where practical, consolidate deliveries, maximize truck utilization, confirm fabrication tolerances, and complete coordination before release to minimize expedited shipments and remanufacture. 

7. Control construction waste: Require segregation and recycling of joist, deck, accessory, and trim scrap; document diversion by weight; and prohibit unnecessary disposal of recoverable steel. 

8. Design for adaptability and recovery: Where feasible, use regular framing layouts, accessible connections, clear material records, and details that allow future alteration, selective disassembly, reuse, or recycling without compromising structural performance. 

9. Protect long-term performance: Match primers, galvanizing, or other protective systems to the actual environment. Address water management, dissimilar materials, trapped moisture, chemical exposure, and inspection access. Do not add coatings without considering their own environmental and maintenance impacts. 

Important Qualifications 

Sustainability performance varies by mill route, electricity mix, recycled feedstock, fabrication plant, transportation distance, coating system, structural efficiency, service life, and end-of-life assumptions. EPD results are estimates based on defined assumptions and should not be treated as direct comparative claims when scopes differ. Structural safety, code compliance, fire protection, diaphragm performance, erection requirements, and durability remain primary design obligations. 

In summary, steel joists and deck can contribute meaningfully to sustainable construction when their inherent efficiency and recyclability are paired with optimized design, transparent environmental data, disciplined procurement, waste recovery, and long-term durability planning. The recommended approach is to document project-specific performance and make decisions on a whole-building, life-cycle basis. 

Respectfully, 

Brian Tlustosch 

Executive Vice-President 

Steel Encounters 

Selected References 

• Steel Joist Institute — Environmental Product Declarations 

• Steel Deck Institute — Sustainability 

• Steel Deck Institute — Industry-Average EPD 

• American Iron and Steel Institute — 2025 Steel Construction Products Environmental Guidelines 

• U.S. Environmental Protection Agency — Sustainable Materials Management Basics 

• U.S. Environmental Protection Agency — Sustainable Management of Construction and Demolition Materials