Completed timber riding arena on a Washington horse property with the Cascade range behind it

Equestrian Timber

The timber behind arenas, barns, stalls and shelters. Milled to the sections horse facilities actually call for, and shipped from Arlington.

Horse Buildings Are a Span Problem

Almost every structure on a horse property is shaped by one constraint. You cannot put a post where a horse needs to travel. That rules out the interior columns a builder would otherwise use to break up a roof, and it pushes the whole load into fewer, larger members running further.

A 70 by 160 arena is not a big building by commercial standards. It becomes a demanding one the moment you say nothing may stand inside it. The same logic applies at smaller scale to a stall block that needs a clear aisle, and to a run-in that has to stay open across its full front.

That is why equestrian work turns up at a mill rather than a lumber yard. The sections are larger than stock, the lengths are longer than a truck of dimensional lumber carries, and the species has to have published design values an engineer will accept.

We mill Coast Douglas Fir from 6x6 up to 30x30, in lengths to 60 ft. Both of those numbers matter here more than on most jobs, and the second one matters more than people expect.

What We Supply

SpeciesCoast Douglas Fir (Pseudotsuga menziesii)
Standard gradeNo. 1 Structural
UpgradeSelect Structural, adds 30 percent
Sections6x6 through 30x30
Standard lengthsUp to 20 ft, no surcharge
Custom lengths21 to 60 ft, surcharge by tier
Free of Heart CenterAvailable to 12x12
ConditionGreen, rough cut, near full nominal
Douglas Fir timber frame going up on an equestrian barn with metal roofing being installed

Every Splice Is a Decision You Have to Justify

Most mills stop at 20 ft because that is what standard stock and standard trucking handle. On an arena, stopping at 20 ft means joining members over the span, and every joint becomes something your engineer has to detail, your builder has to execute, and you have to look at for the next forty years.

We cut to 60 ft. That is log-limited rather than mill-limited, which is the honest way to put it. Above 20 ft a length surcharge applies by tier: 21 to 30 ft adds $1 per board foot, 31 to 40 ft adds $2, and 41 to 60 ft adds $3. On a covered arena that premium often costs less than the hardware and labor the splices would have required, which is a calculation worth running before you assume long members are the expensive option.

It is also the reason to talk to a mill early rather than after the drawings are finished. A frame designed around 20 ft members is a different frame from one designed around 40 ft members, and the second one is only on the table if somebody knew it was available.

Four Different Timber Problems

Horse properties get discussed as one category, but the structures on them make quite different demands. What follows is how each one tends to shape the order.

Covered and Open Arenas

The largest timber on any horse property. An arena roof has to cross the riding surface without a post in the middle of it, which makes clear span the single factor driving every section size on the job.

Riding arena timber →

Covered Arenas Specifically

A roof turns a fenced surface into a permitted, engineered building. Snow load, clearance and bay spacing start driving the order, and the comparison against a steel package becomes a real question.

Covered arena timber →

Barns and Stall Blocks

Post-and-beam barns carry a different load case than an arena. Shorter spans, more posts, and a roof that often supports a hay loft. Sections are smaller but the count is higher.

Run-In Shelters and Loafing Sheds

Small footprint, open front, and almost always exposed timber. These are the structures where appearance matters most relative to the amount of wood involved.

Entry Gates and Property Features

Monumental arch entries and gate posts. Short members in large sections, nearly always visible, which puts the emphasis on face quality and heart center placement rather than on span.

Two Things That Catch People Out

Douglas Fir does not go in the ground

Douglas Fir is not naturally rot resistant. The heartwood has some resistance, but in sustained ground contact it will not last, and no amount of section size changes that. If a drawing shows our timber buried, the drawing needs revising before the order does.

The normal answer on horse properties is a pier or a concrete footing with a standoff bracket, so the post starts above grade and stays dry. That is better practice than a buried post regardless of species, because it lets you replace a column decades from now without touching the roof. Where something genuinely must be buried, that member should be pressure treated material, which is not what we mill. We would rather tell you that now than ship you a problem.

Green timber moves, and the frame has to expect it

We ship green. Large sections are not kiln dried, because a 16x16 cannot be dried through without destroying it, so every mill supplying timber at this scale is shipping green whether or not they say so. Freshly cut Douglas Fir sits around 40 to 60 percent moisture content and comes down toward 12 to 15 percent in service over a period of years.

As it goes it will check along the face and shrink across the grain, roughly 1 to 2 percent from green to in-service equilibrium. Checking is a surface characteristic rather than a structural defect, and on an arena nobody is looking at it from three feet away. What matters is that the connection detailing allows for the movement instead of fighting it. A competent timber framer designs for this as a matter of course. It is worth confirming yours has.

Three Ways to Buy the Same Timber

Washington Timber Company is a mill. Everything below starts with the same logs and the same saw. What changes is how much of the work is done before it reaches you.

Option One

Timber

Sections cut to your list and shipped. Your framer handles joinery and assembly on site. The usual route when a contractor is already engaged, or when the frame is being cut locally.

Option Two

Build Kit

We fabricate the package to spec before it ships. Members cut to length and prepared, with the hardware, so what arrives goes together rather than needing to be worked out on site. Useful when the crew raising it is not a timber framing crew.

Option Three

Built

Our partner company Svensen Builders constructs it, working out of the same Arlington location. Western Washington only. This is the route when you want one conversation from footing to finished roof.

What we do not do is erect what we sell. Washington Timber Company mills and fabricates. Construction goes to Svensen Builders in Western Washington, or to your own contractor anywhere else, and we are glad to talk sizes through with whoever is building before anything gets cut. Full detail on packages is on the build kits page.

What to Send Us

We can quote from a cut list in minutes. Without one, the useful starting point is the footprint and what the structure has to do.

A cut list is the fastest route: sizes, lengths and quantities, and we will come back with a price and availability. If you are earlier than that, send the arena or barn footprint, whether it is covered, the clear span you need, and your location for freight. If an engineer has already stamped sizes, send those, and we will tell you honestly whether we can cut them and what the lengths will cost.

Our published rate is $4.60 per board foot, dropping to $3.60 at 4,000 board feet and up, before size and length surcharges. Arena packages frequently clear the volume break on their own, which is worth knowing before you compare quotes. There is a full worked example of the arithmetic on what arena timber costs, the rate card sits on our pricing page, you can run numbers yourself with the load calculator, and sections and design values are on our timber specifications.

Riding Arena Timber in Detail
Crew setting a Douglas Fir timber arena gate frameInterior of a Douglas Fir post and beam horse barnAerial view of a timber run-in shelter on pastureHorse and rider passing beneath a Douglas Fir timber arch entry

Timber for a Horse Property?

Send the footprint, the clear span, and where it ships. We will come back with sizes, availability and a price.