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The Tree Knot logo for custom wood box beams

Premium White Oak

Natural White Oak Box Beams

Solid white oak box beams with natural grain and hollow construction. Built to your dimensions.

Natural white oak box beam showing open grain and an untreated tone

Built to Order

Made to fit your space
Custom width, height, and length.

Made From

Real solid wood boards

Ships Nationwide

Freight shipping or local customer pickup.

Real wood. Natural variation in grain and color.

Natural grain. Solid white oak.

01 / CHARACTER & MATERIAL

White oak is a dense, tight-grained hardwood with ray fleck and mineral streaking. Its natural light tan and amber tones vary across the grain and warm with age.


Each hollow box beam is built from solid white oak boards, milled and mitered at the corners in Comstock Park, Michigan. The hollow construction creates the proportions of solid timber with less weight and fits over mounting cleats.


Finish options

  • Natural / Unfinished — bare oak, ready for on-site sealing or color matching.

  • Matte Clear Coat — a clear matte finish without added stain or tint.


Suited to

Contemporary and minimalist interiors, exposed-grain architectural details, and commercial spaces seeking real hardwood overhead.

Detail photograph placeholder

A three-sided wrap, not a solid timber.

A box beam is a hollow, U-shaped shell built from real wood boards. It fits over mounting cleats or existing structure you want to conceal.

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From below and either side, you see real wood. The hollow construction gives the proportions of solid timber with less weight. Every full-size beam is built to your dimensions.

Built with concealed joinery.

Real solid wood

Every beam is built from real solid wood boards, with the grain and character of natural lumber.

Mitered corners

Boards are milled and mitered at the corners to form a clean, three-sided beam.

Hollow by design

The hollow construction creates the proportions of solid timber with less weight and fits over mounting cleats.

Made to fit your space.

Every full-size beam is made to order. Send your outside width, height and run lengths so the quote can be built around your project.

Outside width

Measure the finished outside width required for each beam. Include anything the hollow beam needs to fit over.

Outside height

Include the finished outside height and any ceiling, wall or trim conditions that affect the fit.

Run lengths

List the length and quantity for each run. Add your ZIP code and any project photos or drawings with the request.

Wood, texture & finish.

Choose the wood, texture and finish for your space. Current options for this beam style are listed in the material section above.

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Real wood varies in grain and color. Compare a physical sample against your floors, cabinetry and daylight before choosing your finish.

Built to fit over mounting cleats.

The three-sided hollow beam fits over mounting cleats secured to the supporting structure. Plan the beam dimensions around the space and anything it needs to conceal.

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Share ceiling conditions and project photos with your quote request so installation and fit questions can be reviewed for your project.

HOW THE QUOTE PROCESS WORKS

Four steps, no guesswork.

01  Send measurements

Send beam count, outside width and height, run lengths, finish preference, and your ZIP code.

02  Review your quote

We review your project dimensions, wood and finish preferences, and shipping or pickup needs for a project-specific quote.

03  Review a sample

Order a physical sample to see the wood, texture, and finish in your own space before deciding.

04  Built to order

Your beams are built from real solid wood boards to your dimensions. Arrange freight shipping or local customer pickup.

Project & material views.

Natural white oak box beam showing open grain and an untreated tone

Existing beam photography shows the material and character of this style.

Additional room, corner-joint and finish-detail photographs are not yet available in this draft. Compare a physical sample to evaluate the wood and finish in your own light.

Order a sample

See the wood in your own space.

Natural white oak box beam showing open grain and an untreated tone

Order a physical sample to compare the wood, texture and finish in your own light before deciding on a full-size beam order.

Real wood varies in grain and color. Explore the current sample options for this beam style.

Order a sample

Shipping & pickup.

Full-size beams ship nationwide by freight or can be collected locally.

Share your ZIP code, beam dimensions and quantities with your quote request.

Nationwide freight

Full-size beams ship coast to coast across the United States by freight.

Local pickup

Customers can arrange local pickup for their full-size beam order.

Protective crating

Beams are crated for safe transit.

Frequently asked questions

Compare Box Beam Styles

Not sure which finish is right for your project? Use this guide to compare texture, color, and style across all our collections.

View All Styles

Explore other beam styles.

Tight grain, ray fleck and mineral streaking. Natural / Unfinished or Matte Clear Coat.

Deep broadaxe marks, gouges and edge wear create the boldest texture in the collection.

Wire-brushed raised grain, moderate scratches and aging marks create a silvered, weathered character.

Tell us about the ceiling.

Send your beam dimensions, quantities, wood and finish preferences, and ZIP code for a project-specific quote.

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Compare a physical sample in your own space before choosing your finish.

Order a sample
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