Architectural Glulam Beams


Glulam Beams are 2x4 or 2x6 Douglas Fir dimensional lumber layered and laminated together with durable, moisture-resistant structural adhesives.  By laminating a number of smaller pieces of timber, a single large, strong, structural member is manufactured from smaller pieces.

Our Glulams have an architectural appearance, meaning that the exposed faces have been sanded, and the all exposed corners have an ease edge.  It is intended to be installed exposed to the naked eye, and takes stain to leave a rich and beautiful color and texture.  

Available Sizes:

Features & Benefits:

     -Comes in various widths and depths to meet any span and open floor plan

     -1.9 True E Stress Rating

     -Beautiful appearance grade that takes stain for an exceptional finish that catches the eye

     -Resource efficient and 100% sustainable 

     -Compatible with TJI I-Joists

     -Easier to work with than steel - cuts, nails, and handles just like regular timber


Allowable Holes:

PDF: Rosboro Glulam Product Brochure

PDF: Glulam Warranty

PDF: Glulam Span Table

PDF: Glulam Design Properties 



 Treated Glulam Beams

Treated glulam beams are pressure treated with a Hi-Clear II, a clear industrial wood preservative. It leaves a light honey color finish that is virtually undetectable to the naked eye.  It is intended for above ground exterior applications, and is most common for raised deck beams.  

Available Sizes

Features & Benefits:

    -Allows for a one piece install that meets code

    -1.9 True E Stress Rating

    -Treated with a honey color stain, leaving a visually appealing and attractive beam

    -Helps you eliminate posts and columns, opening up lower level patios and yard space

    -Backed by a 25-Year Warranty

    -Easier to work with than steel - cuts, nails, and handles just like regular timber


PDF: Treated Glulam Product Brochure

Treated Glulam Warranty

Further Information - Treated Glulams



Hi-Clear II Finish 



Trying to figure what size beam to use for your deck?  Try this convenient span calculator: 

Special Orders:

  -Available in straight and curved beams

  -Available sizes up to:

        Length = 48'

        Depth = 53"

        Width = 14.25" 

  -Allow up to 6-8 weeks for special orders 

  -Learn more here: Rosboro Custom Beams 


Dallas Love Field (Deep Depth Glulams):

St. Louis Science Center GROW Exhibit (Curved Glulams):




Fiber Source: 

Information Request