Handling Glulam Beams

Tips and guidelines on working with glulam beams on the jobsite.

Storage in the Yard and Jobsite

Pre-Installation

Repair (if needed)

Post-Installation

Rosboro Glulam

Glulam Terms and Species

Terms

Unbalanced Glulam Beams

Unbalanced Beam

In terms of strength, the outer tension zone is the most critical section of a glulam beam. In unbalanced beams, the tension side has higher quality lamination than the compression side, allowing a more efficient and economical use of timber resources. To assure proper installation of unbalanced beams, the compression side is clearly stamped with the word "Top". Unbalanced beams are intended primarily for simple span applications, but can be used in multi-span and cantaliever applications.

Balanced Glulam Beams

These members feature symmetrical lumber quality to about mid height. Balanced beams are used in continuous-span and cantilevered applications where both top and bottom may be subject to flexural tension. They can also be used for single-span applications, though unbalanced beams are more efficient and cost effective.

Camber

Rosboro X-Beam is inventoried in standard sizes and specifications by a nationwide network of lumber dealers to provide next day delivery. The standard camber for these inventoried or “stock” glulam products are listed below.

5,000 Foot Radius

Length 12' 14' 16' 18' 20' 22'
24' 26'
5,000' R
0 0 1/8"
1/8"
1/8"
1/8"
1/8" 1/4"


Species:

Douglas fir (DF)

Douglas fir, the predominant framing material in the west, is highly regarded for its dimensional stability and superior strength-to-weight ratio. Its relative density provides excellent nail-holding characteristics.

EWS Combination Balanced or Unbalanced Species Tension
Fb (psi)
Compression
Fb (psi)
Horizontal Shear
Fv (psi)
MOE 106
24F-V4 Unbalanced DF 2400 1950 300 1.9 True
24F-V8 Balanced DF 2400 2400 300 1.9 True


Alaska Yellow Cedar (AYC)

A tough, solid and durable tree, Alaska yellow cedar is noted for its natural oils that make it highly resistant to decay and insect attack. The wood is fine in texture with a straight grain and uniform yellow coloring.

EWS Combination Balanced or Unbalanced Species Tension
Fb (psi)
Compression
Fb (psi)
Horizontal Shear
Fv (psi)
MOE 106
20F-V12 Unbalanced AYC 2000 1400 265 1.5
20F-V13 Balanced AYC 2000 2000 265 1.5