Buy the beam that bears the load.

Rosboro Big Beam DF™ is the perfect choice for high-strength engineered beam and header applications.


  • Easy to cut and install
  • Ideal for wall and floor framing
  • I-Joist depths are compatible in EWP floor systems
  • Dry, straight, and dimensionally stable
  • BigBeam DF does not require special hangers or screws
  • Balanced layup (no top)


  • Full width: 3-½”, 5-½”, and 7″
  • Depths: 9-¼”, 9-½”, 11-¼”, 11-⅞”, 14″, 16″, and 18″

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Click here to see Big Beam’s load table values.

Technical Specs

Weight Span Calculator

Enter the beam width and depth to lookup the approximate weight (per foot):Enter the type of beam, span, and weight to calculate.Crunch the numbers for your next project!

Design Properties

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Inventoried Locally

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Truly Green

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Case Study

Rosboro glulam, famous for its long-span applications, spanned effortlessly across the largest of the H-E-B stores, and the glulam lent itself to the resource-efficient commercial architecture.

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FAQsView More

Can I drill holes in my glulam?

Yes. Glulams are engineered with specific laminations of varying strength and stiffness properties, meaning certain areas or zones of the member need to be protected. View more in the APA EWS Technical Note on drilling, as well as found in our Resource Library.

Contact Rosboro

P.O. Box 20
2509 Main Street
Springfield, OR 97477

Corporate Office: (541) 746-8411
Corporate Fax: (541) 726-8919
Toll-Free Sales Office: (888) 393-2304
Toll-Free Technical Service: (877) 457-4139
Sales Fax: (541) 726-0972