Beam & Timber Size Guide
Everything you need to know about reclaimed beam and timber dimensions. From standard sizes and load-bearing data to the differences between hand-hewn and sawn beams.
Beam & Timber Dimensions
Reclaimed beams and timbers are available in a wide range of sizes. The table below covers the most commonly requested dimensions, from 4x4 posts through massive 12x16 timbers. For hand-hewn beams, actual dimensions can vary significantly along the length of a single timber.
| Nominal Size | Actual (Sawn) | Range (Hand-Hewn) | Weight/Ft* | Board Ft/LF | Common Applications |
|---|---|---|---|---|---|
| 4 x 4 | 3.5" x 3.5" | 3.5" - 4.5" | 3.4 lb | 1.33 | Fence posts, porch columns, light structural, furniture legs |
| 4 x 6 | 3.5" x 5.5" | 3.5" - 6.5" | 5.3 lb | 2.00 | Porch beams, pergola rafters, bench supports |
| 4 x 8 | 3.5" x 7.25" | 3.5" - 8.5" | 7.0 lb | 2.67 | Headers, lintels, pergola beams, mantel blanks |
| 4 x 10 | 3.5" x 9.25" | 3.5" - 10.5" | 8.9 lb | 3.33 | Headers, girders, heavy pergola beams |
| 4 x 12 | 3.5" x 11.25" | 3.5" - 12.5" | 10.9 lb | 4.00 | Headers, ridge boards, major lintels |
| 6 x 6 | 5.5" x 5.5" | 5.5" - 7" | 8.4 lb | 3.00 | Posts, pergola columns, barn frames, mantels |
| 6 x 8 | 5.5" x 7.5" | 5.5" - 9" | 11.4 lb | 4.00 | Floor beams, girders, heavy pergolas, headers |
| 6 x 10 | 5.5" x 9.5" | 5.5" - 11" | 14.4 lb | 5.00 | Floor beams, bridge timbers, ridge beams |
| 6 x 12 | 5.5" x 11.5" | 5.5" - 13" | 17.5 lb | 6.00 | Major floor beams, heavy headers, commercial |
| 6 x 14 | 5.5" x 13.5" | 5.5" - 15" | 20.5 lb | 7.00 | Long-span floor beams, industrial girders |
| 8 x 8 | 7.5" x 7.5" | 7" - 9" | 15.6 lb | 5.33 | Heavy posts, barn frames, timber frame bents |
| 8 x 10 | 7.5" x 9.5" | 7" - 11" | 19.7 lb | 6.67 | Major beams, girders, commercial structures |
| 8 x 12 | 7.5" x 11.5" | 7" - 13" | 23.9 lb | 8.00 | Heavy floor beams, bridge timbers |
| 8 x 14 | 7.5" x 13.5" | 7" - 15" | 28.0 lb | 9.33 | Major structural beams, warehouse girders |
| 10 x 10 | 9.5" x 9.5" | 9" - 11" | 25.0 lb | 8.33 | Large posts, heavy timber frames, showpiece beams |
| 10 x 12 | 9.5" x 11.5" | 9" - 13" | 30.2 lb | 10.00 | Major structural beams, barn restorations |
| 10 x 14 | 9.5" x 13.5" | 9" - 15" | 35.5 lb | 11.67 | Heavy commercial beams, bridge members |
| 12 x 12 | 11.5" x 11.5" | 11" - 13" | 36.6 lb | 12.00 | Main columns, heavy industrial, showpiece installations |
| 12 x 14 | 11.5" x 13.5" | 11" - 15" | 43.0 lb | 14.00 | Major industrial columns, statement pieces |
| 12 x 16 | 11.5" x 15.5" | 11" - 17" | 49.3 lb | 16.00 | Bridge timbers, heavy industrial, rare showpieces |
* Weight estimates based on Douglas Fir at 12% moisture content (~28 lb/ft³). Actual weight varies by species and moisture level. Oak beams weigh approximately 60% more. Use our Board Foot Calculator for pricing estimates.
Types of Beams Available
Not all beams are created equal. Understanding the different types helps you choose the right beam for your application, budget, and aesthetic goals.
Solid Sawn Beams
A solid timber cut directly from a single log using a circular saw or band saw. The most common type of reclaimed beam, typically originating from post-1870 barns, warehouses, factories, and commercial buildings. Solid sawn beams have consistent rectangular cross-sections with visible saw marks on the surface. They offer predictable dimensions and straightforward structural engineering.
Typical origin: Industrial buildings, warehouses, barns (post-1870)
Sizes available: 4x4 through 12x16+
Lengths: 8 to 24 feet common, longer available
Price range: Standard reclaimed beam pricing
Hand-Hewn Beams
Shaped by hand from a whole log using broadaxes and adzes. These beams predate the widespread use of sawmills and are typically found in structures built before 1870. Each beam is unique, with visible axe facets on the surface and slightly irregular cross-sections. Hand-hewn beams are the most prized category of reclaimed timber, commanding premium prices for their craftsmanship, character, and historical significance.
How to identify: Irregular faceted surface with shallow scallop marks from the adze or broadaxe. Often retain bark edge remnants on one or more faces. Cross-section is roughly rectangular but not precisely square.
Typical origin: Pre-1870 barns, churches, covered bridges, mills
Sizes available: 6x6 through 12x14+ (as found)
Lengths: 12 to 30+ feet, some exceptional specimens over 40 feet
Price range: Premium tier, 2-4x the cost of sawn beams
Box Beams
A hollow beam constructed by wrapping reclaimed lumber planks around a lightweight frame (typically plywood or dimensional lumber). Box beams are used exclusively for decorative (non-structural) applications. They provide the visual impact of a massive timber beam at a fraction of the weight and cost. This makes them ideal for ceiling installations where the supporting structure cannot handle the weight of a solid beam.
Construction: Three-sided (open top, mounted against ceiling) or four-sided (freestanding). Reclaimed 1x stock wrapped around a plywood or lumber skeleton.
Weight advantage: A 6x8 box beam weighs approximately 3-4 lb/ft versus 11+ lb/ft for solid. A 20-foot decorative beam drops from ~230 lb to ~70 lb.
Best for: Ceiling accent beams, decorative headers, restaurant/retail interiors
Price range: Less expensive than solid beams of equivalent visual size
Glue-Laminated (Glulam) vs Solid
Glulam beams are engineered products made by bonding multiple layers of dimensional lumber together. While we do not produce glulam beams, understanding the comparison helps when deciding between engineered and solid reclaimed beams for your project.
| Factor | Solid Reclaimed | Glulam (New) |
|---|---|---|
| Strength | Variable; requires individual grading | Engineered, consistent, rated values |
| Appearance | Unique character, patina, history | Uniform, visible lamination lines |
| Max size | Limited by original tree/timber | Virtually unlimited |
| Sustainability | Excellent — reusing existing wood | Good — efficient use of new lumber |
| Cost | Varies by size, species, condition | Moderate; predictable pricing |
Simple Span Load-Bearing Capacity
The following table provides approximate total uniformly distributed load capacities (in pounds) for common beam sizes at various spans. These values assume Douglas Fir #1 grade with a fiber stress of 1,350 psi and modulus of elasticity of 1,700,000 psi. Simple span means the beam is supported at both ends only.
| Beam Size | 6' Span | 8' Span | 10' Span | 12' Span | Species/Grade |
|---|---|---|---|---|---|
| 4 x 6 | 1,850 lb | 1,390 lb | 1,110 lb | 925 lb | Douglas Fir #1 |
| 4 x 8 | 3,220 lb | 2,420 lb | 1,930 lb | 1,610 lb | Douglas Fir #1 |
| 4 x 10 | 5,170 lb | 3,880 lb | 3,100 lb | 2,580 lb | Douglas Fir #1 |
| 4 x 12 | 7,570 lb | 5,680 lb | 4,540 lb | 3,780 lb | Douglas Fir #1 |
| 6 x 8 | 5,440 lb | 4,080 lb | 3,260 lb | 2,720 lb | Douglas Fir #1 |
| 6 x 10 | 8,680 lb | 6,510 lb | 5,210 lb | 4,340 lb | Douglas Fir #1 |
| 6 x 12 | 12,720 lb | 9,540 lb | 7,630 lb | 6,360 lb | Douglas Fir #1 |
| 8 x 10 | 11,830 lb | 8,870 lb | 7,100 lb | 5,920 lb | Douglas Fir #1 |
| 8 x 12 | 17,340 lb | 13,010 lb | 10,410 lb | 8,670 lb | Douglas Fir #1 |
| 10 x 10 | 15,200 lb | 11,400 lb | 9,120 lb | 7,600 lb | Douglas Fir #1 |
| 10 x 12 | 22,290 lb | 16,720 lb | 13,370 lb | 11,140 lb | Douglas Fir #1 |
| 12 x 12 | 27,000 lb | 20,250 lb | 16,200 lb | 13,500 lb | Douglas Fir #1 |
Important: Structural Engineering Required
The load capacity figures above are approximate reference values for new lumber. Reclaimed beams require individual assessment by a licensed structural engineer before use in load-bearing applications. Factors that reduce capacity include: checking and splitting, insect damage, prior notching or boring, and moisture content. Always have reclaimed structural beams inspected and graded before installation.
Continuous Span Load-Bearing Capacity
A continuous beam spans over three or more supports (e.g., a beam running over multiple posts). Continuous beams carry approximately 25% more load than simple spans of the same size because the load is distributed across multiple supports. Values shown are approximate total uniformly distributed load in pounds for Douglas Fir #1.
| Beam Size | 8' Span | 10' Span | 12' Span | 14' Span | 16' Span |
|---|---|---|---|---|---|
| 6 x 8 | 5,100 lb | 4,080 lb | 3,400 lb | 2,910 lb | 2,550 lb |
| 6 x 10 | 8,140 lb | 6,510 lb | 5,430 lb | 4,650 lb | 4,070 lb |
| 6 x 12 | 11,930 lb | 9,540 lb | 7,950 lb | 6,810 lb | 5,960 lb |
| 8 x 10 | 11,090 lb | 8,870 lb | 7,400 lb | 6,340 lb | 5,550 lb |
| 8 x 12 | 16,260 lb | 13,010 lb | 10,840 lb | 9,290 lb | 8,130 lb |
| 10 x 12 | 20,900 lb | 16,720 lb | 13,930 lb | 11,940 lb | 10,450 lb |
| 12 x 12 | 25,310 lb | 20,250 lb | 16,880 lb | 14,470 lb | 12,660 lb |
* Values assume Douglas Fir #1 grade. Continuous span means the beam runs over intermediate supports without joints. Spans are measured between supports. For other species, multiply by: White Pine 0.68, Southern Yellow Pine 1.10, White Oak 0.95, Red Oak 0.88.
Hand-Hewn vs Sawn Beams
Reclaimed beams fall into two broad categories: hand-hewn timbers shaped with axes and adzes (typically pre-1870), and mill-sawn beams cut with circular or band saws (post-1870). Each type has distinct characteristics that affect sizing, pricing, and application.
| Characteristic | Hand-Hewn | Mill-Sawn |
|---|---|---|
| Surface Texture | Rough, faceted with visible adze/axe marks | Smooth or saw-marked with consistent surface |
| Dimensional Consistency | Varies along length, may taper or bow | Consistent dimensions, square edges |
| Cross-Section Shape | Roughly square/rectangular, may be irregular | True square or rectangle |
| Size Tolerance | +/- 1" or more from nominal | +/- 1/4" from nominal typically |
| Structural Capacity | Use minimum cross-section for calculations | Standard engineering tables apply |
| Aesthetic Appeal | Highest character, rustic, one-of-a-kind | Clean lines, can be rustic or refined |
| Cost | Premium pricing for large, clean beams | Standard reclaimed beam pricing |
| Installation Ease | More complex, requires custom connections | Standard timber frame connections work |
| Common Origin | Pre-1870 barns, churches, mills | Post-1870 industrial, commercial, agricultural |
| Available Lengths | Often 12-30+ feet | Typically 8-24 feet |
Beam Connection Hardware & Details
How a beam connects to its supporting structure is critical for both structural integrity and aesthetics. Here are the most common connection methods used with reclaimed beams.
Steel Beam Hangers (Joist Hangers)
Manufactured metal brackets (such as Simpson Strong-Tie LUS, HUS, and GLT series) that cradle the beam and transfer its load to the supporting member. Available in sizes from 4x4 through 12x14+. For structural applications, hangers must be sized to match both the beam dimensions and the load. Use only the fastener type and quantity specified by the manufacturer — never substitute nails for the specified structural screws or bolts.
Common types: Simpson LUS (face mount), Simpson HUS (top flange), Simpson?"x?" concealed flange for clean aesthetics.
Through-Bolt Connections
A traditional timber frame connection where bolts pass completely through both members, secured with washers and nuts. Through-bolt connections are strong, reliable, and easy to inspect. For reclaimed beams, pre-drill bolt holes to prevent splitting — old-growth wood is dense and prone to cracking if forced. Use galvanized or stainless steel bolts for any exterior or moisture-exposed applications.
Sizing guide: 1/2" bolts for 4x-6x beams, 5/8" bolts for 6x-8x beams, 3/4" bolts for 8x-12x beams. Always use oversized washers (at least 2" diameter) to distribute bearing pressure and prevent the bolt head from crushing into the wood.
Bearing Plate Connections
A steel plate placed between the beam and its support (post or wall) to distribute the bearing load evenly. Critical when a heavy beam sits on a narrow post or when the beam end would otherwise crush the supporting wood fibers. The plate should be at least as wide as the beam and at least 1/4" thick steel for most residential applications. For beams carrying more than 5,000 lb, consult an engineer for plate sizing.
Key detail: Bearing area must be sufficient to prevent cross-grain crushing. Douglas Fir has a perpendicular-to-grain compression strength of approximately 625 psi. A 6x8 beam (41.25 sq in bearing area) can support about 25,780 lb before crushing — but the supporting member must also be checked.
Decorative Hardware Options
For exposed beam installations where aesthetics matter, decorative hardware adds both structural support and visual character. Options include wrought iron beam straps, hammered steel plates, black powder-coated brackets, and custom-fabricated connectors. Many clients choose decorative hardware that echoes the historical character of hand-hewn beams.
Popular options: Black iron T-straps, decorative lag bolt heads, forged steel beam brackets, timber frame knee braces with decorative pegs. We can recommend local metalworkers who specialize in custom beam hardware.
Structural Engineering Considerations
Using reclaimed beams in structural applications requires careful engineering. This section covers the basics of when and why you need professional engineering services.
When You Need an Engineer
- -Any load-bearing beam installation (floor beams, ridge beams, headers)
- -Removing a bearing wall and replacing it with a beam
- -Timber frame construction or repair
- -Spans greater than 8 feet under any significant load
- -Any beam supporting a floor, roof, or upper-story wall
- -Commercial and public-access buildings (required by code)
- -When using reclaimed beams with unknown species or grade
Minneapolis and Hennepin County building codes require engineered drawings for structural timber work. We can connect you with licensed timber frame engineers who specialize in reclaimed beam applications.
Load Calculation Basics
Beam sizing depends on four main factors:
- 1.Span: The distance between supports. Longer spans require larger beams. Doubling the span quadruples the required beam strength (load capacity decreases inversely with span).
- 2.Tributary area: The floor or roof area the beam supports. A beam carrying half of a 24-foot-wide room has a tributary width of 12 feet.
- 3.Live load: The weight of people, furniture, and movable objects. Residential floors: 40 psf. Decks: 40-60 psf. Snow loads: 30-50 psf in Minnesota.
- 4.Dead load: The weight of the structure itself — flooring, subfloor, joists, ceiling below, roofing. Typically 10-20 psf for residential floors.
Deflection Limits
A beam does not just need to be strong enough not to break — it also needs to be stiff enough not to sag visibly or cause cracking in finishes. Building codes set deflection limits:
- L/360 (live load): For floor beams. A 12-foot beam can deflect no more than 0.4" (12 x 12 / 360) under live load. This is the most common limit.
- L/240 (total load): For floor beams under combined live and dead loads. A 12-foot beam can deflect no more than 0.6".
- L/180 (total load): For roof beams not supporting a finished ceiling. More lenient because some sag is acceptable in a roof structure.
- L/480: Sometimes specified for beams supporting tile floors or other brittle finishes.
Deflection is often the controlling factor for beam sizing, not strength. A beam may be strong enough but too "bouncy" — requiring a deeper beam to increase stiffness.
Safety Factors
Structural engineering uses safety factors to account for uncertainties. For wood construction:
- Standard safety factor: 2.1 for bending stress (the beam is designed to support 2.1x the expected maximum load before failure)
- Reclaimed beam additional factor: Engineers typically apply an additional reduction of 15-25% for reclaimed beams to account for unknowns (hidden defects, uncertain species, prior loading history)
- Duration of load factor: Wood can carry higher loads for short durations. Snow loads (2-month duration) get a 1.15 multiplier. Impact loads (instantaneous) get a 2.0 multiplier.
These safety factors are built into the span tables and load capacity figures throughout this guide. Never exceed published load values, and always consult an engineer for structural applications.
Beam Selection by Application
Different applications call for different beam sizes, types, and finishes. Use this guide as a starting point, then consult our team for specific recommendations based on your project.
Fireplace Mantels
Recommended sizes: 4x6, 6x6, 6x8, or 8x8 depending on fireplace width and desired visual weight
Typical lengths: 4-7 feet (should extend 6-12" beyond each side of the firebox opening)
Best beam type: Hand-hewn for maximum character, or solid sawn with heavy patina
Finish: Wire-brushed or lightly sanded, then sealed with matte polyurethane or hard wax oil
Sizing rule of thumb: For a standard 36-48" firebox, a 6x6 or 6x8 beam provides excellent proportions. For a grand 60"+ firebox, step up to 8x8 or 8x10.
Mounting: Non-structural (decorative only). Mounted with heavy-duty steel brackets lagged into the wall framing or masonry. Minimum 2 brackets, spaced evenly. Total mounting hardware should be rated for 3x the beam weight as a safety factor.
Clearance: Check local code for minimum clearance above the firebox opening (typically 12" for non-combustible mantels, up to 18" for wood mantels without a non-combustible backing).
Decorative Ceiling Beams
Recommended sizes: Scale to room size. Small rooms (under 200 sq ft): 4x6 or 6x6. Medium rooms (200-400 sq ft): 6x8 or 8x8. Large rooms (400+ sq ft): 8x10 or larger.
Spacing: For parallel ceiling beams, space 4-6 feet apart for a balanced look. Odd numbers of beams (3 or 5) tend to look more natural than even numbers.
Best beam type: Box beams for lightweight installation, or solid beams for authenticity. Consider ceiling structure capacity — solid 8x8 beams at 16 feet long weigh 200+ lb each.
Ceiling height matters: In standard 8-foot ceilings, limit beam depth to 6" maximum to avoid a claustrophobic feel. In 9-10 foot ceilings, 8" deep beams work well. In vaulted or cathedral ceilings (12'+), go as large as the structure supports.
Finish: Wire-brushed or skip-planed for a clean rustic look. Dark stain or natural patina both work well against white or light-colored ceilings.
Mounting: Use concealed steel brackets or continuous French cleat systems. Each bracket should be lagged into a ceiling joist or blocking. Plan bracket locations before ceiling finishing.
Structural Headers (Over Openings)
Sizing by span: 4-foot opening: 4x6 minimum. 6-foot opening: 4x8 or 6x8. 8-foot opening: 6x10 or 8x10. 10-12 foot opening: 8x12 or larger. These are starting points — actual sizing depends on the load above.
Species matters: Douglas Fir and Southern Yellow Pine are the strongest common softwood species. Oak provides excellent strength but is harder to cut and fasten. Avoid soft species like white pine for structural headers.
Bearing requirements: Headers must bear on jack studs or posts at each end. Minimum bearing length is typically 1.5" for each foot of span (but never less than 3"). A 10-foot header needs at least 15" of bearing at each end.
Engineering required: Always. Headers carry the weight of everything above them down to the foundation. An undersized header is one of the most dangerous structural mistakes in construction. Get engineered drawings for any header over a 4-foot span.
Porch & Pergola Beams
Posts: 6x6 minimum for structural porch posts. 4x4 for light pergola posts up to 8 feet tall. 8x8 for grand porches or posts taller than 10 feet.
Main beams: 6x8 or 6x10 for spans up to 12 feet. 8x10 or 8x12 for spans up to 16 feet. Double beams (two beams side by side) for very long spans or heavy loads.
Rafters: 2x6 or 2x8 for pergola rafters (non-structural shade). 4x6 for structural porch rafters carrying a roof.
Weather considerations: Exterior beams must be a durable species (cedar, white oak, Douglas Fir, or pressure-treated) or properly sealed. Reclaimed Douglas Fir and white oak are excellent exterior choices. Avoid red oak and maple for exterior use — they decay quickly.
Ground contact: Posts in contact with soil or concrete should be set on elevated post bases to prevent rot, or use naturally rot-resistant species. Even rot-resistant reclaimed beams will eventually decay in constant soil contact.
Barn Door Headers
Recommended sizes: 4x6 or 6x6 for standard interior barn door track headers (3-5 foot doors). 6x8 for double barn door installations (6-10 foot combined opening).
Length: Should extend at least 12" beyond the door opening on each side to accommodate the track and door travel.
Important note: A barn door header must support the weight of the door (75-200 lb for most interior doors) plus the lateral forces from opening and closing. The header must be lagged securely into wall studs, not just into drywall. Use structural lag screws, not drywall anchors.
Finish: Match the door hardware style — matte black hardware pairs well with rough-sawn or wire-brushed beams. Stainless hardware complements cleaner, planed beams.
Decorative vs Structural Beams
Not all beam installations are structural. Understanding the difference helps you choose the right beam, save money, and meet building code requirements.
Decorative Beams
Decorative beams add visual warmth and character without bearing any structural load. They are typically mounted to the ceiling or wall using hidden brackets and may be solid or hollow (box beams wrapped in reclaimed wood).
Common Applications
- -Ceiling accent beams in living rooms, kitchens
- -Fireplace mantels and surrounds
- -Decorative headers above doorways and windows
- -Accent shelving brackets and supports
- -Restaurant and retail interior design
Sizing Flexibility
Since decorative beams do not bear load, you have more flexibility with size, species, and condition. Beams with character marks, checking, or minor insect damage that would disqualify them from structural use are often prized for decorative applications.
Structural Beams
Structural beams must support the weight of the building above them: floors, roofs, walls, and live loads. They must be properly graded, sized for the span and load, and approved by a structural engineer.
Common Applications
- -Floor support beams and girders
- -Ridge beams and purlins in timber-frame roofs
- -Post-and-beam frame construction
- -Load-bearing headers over openings
- -Barn restoration and timber frame repair
Requirements
Structural reclaimed beams must be professionally graded (we recommend visual stress grading by a certified grader). Building code in Minneapolis and Hennepin County requires engineered drawings for structural timber. We can connect you with experienced timber frame engineers.
Installation Considerations
Installing reclaimed beams — especially large ones — requires careful planning for weight, access, and long-term performance. Here's what to consider before your beam arrives.
Weight Handling & Rigging
Large beams are extremely heavy. Here are approximate total weights for common beam sizes at 16 feet long (Douglas Fir):
- 6x6 x 16' = ~135 lb (2-3 people can manage)
- 6x8 x 16' = ~182 lb (3-4 people or a hoist)
- 8x8 x 16' = ~250 lb (mechanical assist recommended)
- 8x12 x 16' = ~382 lb (requires crane, forklift, or chain hoist)
- 10x12 x 16' = ~483 lb (requires crane or forklift)
- 12x12 x 16' = ~586 lb (crane required)
For oak beams, multiply these weights by approximately 1.5x. A 12x12 oak beam at 16 feet weighs nearly 900 lb — a serious lift requiring professional rigging equipment.
Shrinkage & Checking Expectations
Even well-dried reclaimed beams may develop new surface checks (cracks) as they acclimate to indoor environments, particularly during the first heating season when indoor humidity drops below 30%. This is normal and expected behavior for large solid timbers — it does not indicate a structural problem. Surface checks in a beam used decoratively are purely cosmetic.
To minimize checking: Acclimate beams indoors for 2-4 weeks before installation. Apply end-grain sealer to beam ends immediately upon delivery. Maintain indoor humidity between 35-55% year-round if possible. Accept that some checking is part of the natural character of solid timber.
Finish Options for Exposed Beams
- -Natural / unfinished: Preserves the raw, authentic look. Best for beams with excellent patina. May shed dust initially; a light vacuuming and wipe-down is recommended.
- -Hard wax oil (Rubio Monocoat, Osmo): Our most recommended finish. Penetrates the wood without forming a film, preserving the texture and feel. Provides mild moisture resistance. Easy to touch up. Enhances grain and color without a "plasticky" look.
- -Matte polyurethane: A film-forming finish that provides strong protection. Use water-based for minimal color change, oil-based for a warm amber tone. Matte sheen maintains a natural look.
- -Tung oil or linseed oil: Traditional penetrating oils that deepen color and enhance grain. Multiple coats required. Allow 24-48 hours between coats. Takes 1-2 weeks to fully cure. Excellent for hand-hewn beams where you want to enhance the tool marks.
Access & Delivery Planning
Before ordering a large beam, measure all access points between the delivery truck and the installation location:
- -Measure door widths, hallway widths, and stairway clearances
- -Check for turns — a 16-foot beam cannot navigate a 90-degree hallway turn unless the hallway is very wide
- -Consider ceiling height at all transition points
- -For new construction, install beams before closing in walls and ceilings
- -For renovations, beams may need to come in through windows or be craned over the building
Reclaimed Beam Characteristics
Reclaimed beams carry the marks of their previous lives. Understanding these characteristics helps you appreciate the story each beam tells and set realistic expectations for your project.
Checking Patterns
Surface checks (cracks) are a natural result of large timber drying over decades. They typically run along the grain and are deeper in the center of the beam face. Checks are cosmetic — they rarely affect structural integrity. Deep checks can be stabilized with tinted epoxy or left as-is for character. End checks are more common and can be trimmed off if needed.
Nail Holes & Bolt Holes
Most reclaimed beams have holes from their original fasteners — nails, bolts, lag screws, and sometimes wooden pegs. These are among the most valued character marks. Square nail holes (from pre-1890s cut nails) are especially prized by designers. Round holes from modern nails and bolts are common in industrial beams. All metal is removed during our processing, but holes remain as character features.
Mortise & Tenon Pockets
Rectangular cutouts from original timber frame joinery. These pockets are signatures of authentic barn and timber frame construction. They can be oriented to a hidden face, filled with a contrasting wood plug, or left visible as a dramatic character feature. Mortise pockets are common in beams from 18th and 19th-century post-and-beam structures.
Patina Variations
The color of a reclaimed beam depends on its species, age, and exposure history. Interior beams tend toward warm honey and amber tones. Exterior-exposed beams develop a silver-grey patina. Barn beams may show a mix of both — grey on the exposed side and warm brown on the protected side. This color variation is one of the defining features of reclaimed timber.
Wane & Bark Edge
Some beams retain the natural curved edge of the original tree, sometimes with bark still attached. This is called "wane" and is common on beams cut near the outside of the log. Wane adds an organic, natural element to a beam. For structural beams, wane reduces the effective cross-section and must be accounted for in engineering calculations. For decorative beams, wane is a design feature.
Insect Traces
Small tunnels and exit holes from wood-boring beetles (powder post beetles, old house borers) are common in reclaimed beams, especially those from agricultural buildings. The insects are long gone — these marks are historical, not active infestations. Light insect traces add texture and visual complexity. Heavy insect damage that compromises structural integrity will be noted in our beam descriptions and is typically reserved for decorative use only.
Beam Weight by Species
Knowing beam weight is critical for planning transport, crane lifts, and ensuring your mounting hardware is rated appropriately. This table shows approximate weight per linear foot for common reclaimed beam sizes across species.
| Beam Size | Douglas Fir (~32 pcf) | White Pine (~25 pcf) | White Oak (~47 pcf) | Red Oak (~44 pcf) |
|---|---|---|---|---|
| 4 x 6 | 4.3 lb | 3.3 lb | 6.3 lb | 5.9 lb |
| 6 x 6 | 6.7 lb | 5.3 lb | 9.9 lb | 9.2 lb |
| 6 x 8 | 9.2 lb | 7.2 lb | 13.5 lb | 12.6 lb |
| 8 x 8 | 12.2 lb | 9.5 lb | 17.9 lb | 16.8 lb |
| 8 x 10 | 15.6 lb | 12.2 lb | 22.9 lb | 21.4 lb |
| 8 x 12 | 18.9 lb | 14.8 lb | 27.8 lb | 26.0 lb |
| 10 x 10 | 19.8 lb | 15.5 lb | 29.1 lb | 27.2 lb |
| 10 x 12 | 23.9 lb | 18.7 lb | 35.2 lb | 32.9 lb |
| 12 x 12 | 29.0 lb | 22.7 lb | 42.6 lb | 39.9 lb |
| 12 x 14 | 34.1 lb | 26.7 lb | 50.1 lb | 46.9 lb |
| 12 x 16 | 39.1 lb | 30.6 lb | 57.5 lb | 53.8 lb |
* Weights are per linear foot at approximately 12% moisture content. Green or recently salvaged beams can weigh 30-50% more due to higher moisture content. Always account for moisture when planning lifts and transport.
Ordering Reclaimed Beams
Measure Your Space Precisely
Know the exact span, clearance height, and any obstructions. For decorative beams, measure the ceiling length and note any HVAC, electrical, or plumbing that the beam needs to work around.
Specify Your Application
Tell us whether the beam is structural or decorative. Structural beams require grading and may need to be a specific species. Decorative beams give you more flexibility in species, condition, and price point.
Consider the Finish
Do you want the beam left rough (maximum character), wire-brushed (cleaned but textured), or planed smooth (refined look)? Each finish affects the final dimensions and price. Planing a beam removes 1/4" to 1/2" per face.
Plan for Delivery
Large beams are heavy. A 12x12 oak beam 16 feet long weighs over 680 pounds. Ensure your delivery site has equipment to unload (forklift, crane, or enough hands). We offer flatbed delivery with hydraulic unloading across the Twin Cities.
Visit Our Yard to Hand-Select
Every reclaimed beam is unique. Character, color, checking patterns, and overall condition vary from beam to beam. For important installations — especially mantels and decorative ceiling beams — we strongly recommend visiting our yard to see and select your beam in person. Photos cannot fully convey the presence of a large reclaimed timber.
Frequently Asked Questions About Beams
How can I tell if a reclaimed beam is structurally sound?
Look for these positive indicators: solid wood that sounds firm when tapped (not hollow), surface checks that don't extend through the beam, tight grain with no soft spots, and no evidence of active insect damage (fresh frass or sawdust). However, visual inspection has limits. For structural applications, always have the beam professionally graded by a certified timber grader. We can arrange grading for any beam in our inventory.
Can I use a reclaimed beam as a structural replacement for a steel I-beam?
In many cases, yes, but the timber beam will need to be significantly larger than the steel it replaces. A W8x31 steel beam (8" deep, 31 lb/ft) spanning 16 feet can support approximately 30,000 lb. A timber beam would need to be approximately 10x14 or larger in Douglas Fir to match this capacity. Always have an engineer specify the size — there is no simple rule of thumb for steel-to-timber conversion because it depends on span, load, and deflection requirements.
Do reclaimed beams attract termites or other insects?
No. The insect holes you see in reclaimed beams are from wood-boring beetles that completed their life cycle decades ago. The insects are long gone. Dry, seasoned wood (which all reclaimed beams are, having air-dried for decades) is far less attractive to termites than green, freshly cut lumber. That said, standard termite prevention practices should still be followed for any ground-level or below-grade installation.
What is the longest reclaimed beam you can supply?
We regularly stock beams up to 24 feet long and occasionally have beams exceeding 30 feet. Hand-hewn beams from large barns and churches can be remarkably long — we have handled specimens over 40 feet. For very long beams, delivery logistics become a significant factor (flatbed truck, oversize load permitting). Contact us with your length requirements and we will check our current inventory and salvage pipeline.
How much does a reclaimed beam cost compared to new timber?
Reclaimed beam pricing depends on size, species, condition, and whether it is hand-hewn or sawn. As a general guide: sawn reclaimed beams are priced similarly to or slightly above new timber of comparable size. Hand-hewn beams command a premium of 2-4x over sawn beams due to their rarity, character, and historical value. Old-growth species (longleaf pine, American chestnut, white oak) also command premiums. Contact us for current pricing on specific sizes.
Can reclaimed beams be used outdoors?
Yes, with proper species selection and finishing. White oak, cedar, and Douglas Fir have natural decay resistance and are excellent choices for exterior beam applications like pergolas, covered porches, and arbors. Red oak, maple, and most softwoods will decay quickly if exposed to weather without protection. For any exterior application, we recommend a penetrating oil finish (like CUTEK or Penofin) that can be renewed periodically, rather than a film-forming finish that will peel.
Will my reclaimed beam continue to check (crack) after installation?
Some additional checking is likely, especially during the first winter when indoor humidity drops. Large solid timbers are always in the process of slowly reaching moisture equilibrium with their environment. Checking is cosmetic and does not affect the beam's structural integrity. To minimize new checking, maintain indoor humidity between 35-55%, apply end-grain sealer to beam ends, and acclimate the beam indoors for 2-4 weeks before installation. Most checking stabilizes within the first year.