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Big Apple K-Joist® – Steel Roof Joist System (I-Shaped Structural Joist)

Big Apple K-Joist® – Steel Roof Joist System (I-Shaped Structural Joist)

by OEG
Structural & Finish Materials
Job-Site Delivery & Support
Local Inventory. Real Operations.
B2B Financing Available

Big Apple K-Joist® is a high-performance steel roof joist system engineered for faster installation, reduced labor, and simplified structural framing. Designed with an I-shaped profile, it delivers greater strength and efficiency compared to traditional C-shaped joists.

This system can often replace conventional bar joists, helping reduce both material costs and lead times while maintaining structural performance. Its integrated attachment system eliminates the need for additional hangers, clips, or angles—streamlining installation and saving valuable jobsite time.

Key Features

  • High-strength I-shaped joist design
  • Faster installation with integrated attachment system
  • Eliminates need for clips, hangers, or additional angles
  • Can replace traditional bar joists in many applications
  • Reduces labor costs and project timelines
  • Compatible with welding, PAF fastening, or Tek-5 screws
  • Lightweight and efficient structural solution

Applications

  • Roof framing systems
  • Commercial and industrial buildings
  • Long-span structural applications
  • Projects requiring faster installation and reduced lead times

Design Advantages

  • Simplified Installation: Built-in structural angle allows direct attachment
  • Cost Savings: Reduces need for additional hardware and labor
  • Faster Lead Times: Alternative to traditional bar joist systems
  • Structural Efficiency: Improved strength-to-weight performance

Specifications

  • Material: Cold-Formed Steel
  • Profile Type: I-Shaped Structural Joist

Available Gauges:

  • 10 Gauge (119 mil)
  • 12 Gauge (096 mil)
  • 14 Gauge (068 mil)

Load Span Data (L/360 Deflection)

Span (ft) 10 GA Capacity (lb/ft) 12 GA Capacity (lb/ft) 14 GA Capacity (lb/ft)
18 1298 1025 444
20 1052 830 400
22 869 686 364
24 730 576 333
26 622 491 308
28 537 423 286
30 467 369 251
32 411 324 221
34 364 287 196
36 325 256 174
38 291 230 157
40 263 208 141

(Full span tables available upon request or submittal package)

  1. Submit a quote request for this product
  2. Our team reviews availability and pricing
  3. We follow up with a detailed quote and next steps

Special order items are sourced to your project requirements. Pricing, availability, and lead times vary by product and quantity.

  • Local pickup options available
  • Delivery available depending on product and location
  • Lead times vary based on availability and order size

Need Help?

Have questions or need help selecting the right materials?

Our team is happy to help.

Delivery time

Available in a 24 hour turnaround

Pickup & Local Delivery Available

Call our team (718) 461-8383 or visit our showroom at 31-31 123rd Street, Flushing, NY.