Rosboro Columns Logo

A note about Rosboro Columns

Since compression parallel to grain stresses are distributed uniformly over the cross-section of a typical column member, Rosboro glulam columns are manufactured using a single grade of lumber throughout the depth of the member. Two distinct values are provided for Fb depending on which axis the load is applied to, i.e., parallel to the wide or to the narrow face of the member.

Rosboro Glulam Columns technical information.

Tall Wall Column Table

Rosboro Glulam Columns

Selection and Stability

Rosboro Columns

X-Beam Architectural Glulam Columns

X-Beam glulam columns are architectural appearance, surfaced four sides and all four edges are eased. These glulam columns remain straight and true and are inventoried in the following sizes: 3-1/2" x 6", 5-1/2" x 5-1/2", 5-1/2" x 6. Other cross sections are available on a custom order basis.

 

 

X-Beam Design Values (Doug-fir)

Comb. Comp. Perp. to Grain Fc⊥ Tension Parallel 
(2 or more Lams) Ft
Comp. Parallel 
(2 or 3 Lams) Fc
Comp. Parallel (4 or more Lams) Fc

MOE 106 psi

EWS3 650 psi
1450 psi
1850 psi
2300 psi
1.8 Apparent
1.9 True


Rosboro Tall Wall Columns

In the past tall walls were conventionally framed and that style of construction created hinges in the framing that could compromise the design. Rosboro columns allow builders to run framing from floor to ceiling with one continuous piece. Rosboro laminated columns are dry so they will remain straight and true and the 3-1/2” and 5-1/2” width fits the wall framing. The same column material can also be used for the horizontal framing in tall wall construction.
Click here for  tall wall column table.

Code Recognized

All Rosboro glulam columns are approved by the ICC-ES Report ESR-1940. They have been inspected and certified by the APA EWS in conformance with the American National Standard (ANSI) A190.1-12.