Glued Laminated Timber (Glulam) Beams (2026)
Glued Laminated Timber (Glulam) consists of layers of dimension lumber bonded together with moisture-resistant adhesives. It is a high-strength engineered wood product used for primary structural support in residential and commercial framing.
Key Features
- High strength-to-weight ratio compared to steel.
- Available in custom long lengths up to 100+ feet.
- Dimensionally stable with predictable engineering properties.
- Available in Appearance Grades: Framing
- Industrial
- Architectural
- and Premium.
Specifications
Applications
- Residential roof and floor girders.
- Long-span garage door headers.
- Custom timber framing projects.
- Commercial floor beams and columns.
Installation Overview
- Install using approved top-mount or face-mount hangers.
- Provide minimum bearing length (usually 3.5 inches at supports).
- Ensure lateral support is provided to prevent rotation.
- Follow specific manufacturer nailing patterns for composite members.
Pros & Cons
Pros
- ✓ Predictable structural performance.
- ✓ Reduced checking compared to solid sawn timber.
- ✓ Capable of sustaining heavy concentrated loads over long spans.
Cons
- ✗ Requires specialized structural hangers.
- ✗ Heavy; often requires mechanical lifting equipment for installation.
- ✗ Sensitivity to moisture if not properly sealed or detailed.
Code Requirements
- Must comply with ANSI/AITC A190.1 standard.
- Subject to IRC Section R502 and IBC Section 2306.
- Requires engineer-of-record approval for non-standard spans.
Buying Tips
- Verify the stress grade matches the specific engineering load requirements.
- Confirm the appearance grade is appropriate for exposed or concealed applications.
- Coordinate delivery logistics for longer beams (over 20 feet) early in the project.