Beams & Timbers
Buying Beams and Timbers: Solid, Glulam, and Engineered Options (2026)
Whether you need a massive ridge beam for a cathedral ceiling or decorative timbers for a post-and-beam home, choosing the right beam product is critical for safety and aesthetics. Solid sawn, glue-laminated, and engineered options each have distinct advantages. This guide helps you navigate the options and buy with confidence.
Key Takeaways
- Whether you need a massive ridge beam for a cathedral ceiling or decorative timbers for a post-and-beam home, choosing the right beam product is critical for safety and aesthetics.
- Solid sawn, glue-laminated, and engineered options each have distinct advantages.
- This guide helps you navigate the options and buy with confidence.
- decorative — structural beams must be engineer-specified and grade-stamped; decorative beams focus on appearance.
- Species and grade — load capacity varies significantly between species and grades.
What to Look For
- Structural vs. decorative — structural beams must be engineer-specified and grade-stamped; decorative beams focus on appearance.
- Species and grade — load capacity varies significantly between species and grades.
- Solid vs. engineered — glulam beams offer longer spans and more consistent properties than solid sawn.
- Moisture content — green timbers are common for timber framing; kiln-dried is essential for interior exposed beams.
- Surface finish — rough-sawn, resawn, hand-hewn, and planed surfaces each create different aesthetics.
Species Comparison
Douglas fir: The premier beam species in North America. Excellent strength, attractive grain, takes stain well.
Southern yellow pine (SYP): Strong and economical. Common for glulam beams.
Western red cedar: Lightweight and naturally rot-resistant. Ideal for decorative exterior beams and pergolas.
White oak: Extremely strong and durable. Traditional timber-framing species. Expensive and heavy.
Reclaimed timbers: Salvaged from old barns and buildings. Dense old-growth wood with unmatched character.
Size Guide
4x6: Light-duty headers, porch beams, and small spans.
6x6: Standard post size and light beam applications. Common pergola component.
6x8 and 6x10: Mid-range beams for residential ridge beams and exposed ceiling beams.
8x8: Heavy timber posts and moderate-span beams.
6x12 through 8x16: Major structural beams for large spans and heavy loads.
Glulam: Available in virtually any width, depth, and length. Custom sizes are standard.
Typical lengths: 8' to 24' for solid sawn; glulam available up to 60'+ in custom orders.
Grade Guide
Select structural: Highest structural grade for solid sawn timbers. Fewest defects, maximum strength.
#1: High-quality structural grade. Small knots allowed. Good for exposed applications.
#2: Standard structural grade. Adequate for most residential beam applications when properly sized.
Free of heart center (FOHC): Timber is cut so the pith is excluded. Reduces checking and improves stability.
24F-V4 (glulam): Common glulam grade rated for 2400 psi bending stress. Architectural appearance grade available.
Budget Breakdown
Douglas fir 6x6x12 (solid): $60–$120.
Douglas fir 6x12x16 (solid): $200–$350.
Glulam beam 5-1/8" x 12" x 20': $300–$500.
Reclaimed barn beam 8x8x12: $200–$600 depending on character.
Cedar 6x6x12 (decorative): $80–$150.
Shipping is a major cost for heavy timbers — sourcing locally saves significantly.
Common Mistakes to Avoid
- Sizing beams without an engineer's specification — undersized beams can catastrophically fail under load.
- Ignoring timber checking — large solid sawn timbers develop checks (cracks) as they dry. This is normal and usually not structural.
- Using green timbers for enclosed applications — shrinkage causes joint gaps and can distort connected framing.
- Not specifying FOHC for exposed timbers — boxed-heart timbers check more dramatically.
- Failing to protect glulam beams from rain during construction — delamination starts quickly with moisture exposure.
Pre-Purchase Checklist
- Obtain structural engineer's beam schedule with species, grade, and dimensions
- Determine whether solid sawn, glulam, or PSL/LVL best meets your needs
- Verify grade stamp and species marking
- For exposed applications, specify surface finish and appearance grade
- Arrange equipment for handling heavy timbers (they can weigh hundreds of pounds)
- Plan adequate bearing at beam supports — minimum 3" bearing for most applications
- Protect glulam and kiln-dried timbers from weather during storage and construction
Frequently Asked Questions
Glulam beams are made from multiple lumber layers bonded together. They offer longer spans, more consistent strength, and less checking than solid sawn timbers of the same size.
Yes, checking is normal in solid sawn timbers as they dry. Surface checks rarely affect structural capacity. FOHC (free of heart center) timbers check less.
Yes. Specify a structural grade with architectural appearance. Glulam offers appearance grades (industrial, architectural, premium) for exposed applications.
Douglas fir is preferred for exposed applications due to its attractive grain. SYP is often more economical for concealed structural beams. Both are excellent structurally.