Custom Crafted Timbers
Colorado Timberframe primarily supplies premium, #1 grade or better, coastal Douglas fir from the Pacific Northwest. Douglas fir enjoys a reputation as an all-purpose wood known for its strength, durability, and ease to work with. It tends to have the least amount of “checking” (cracking), less movement, and is readily accessible and responsibly harvested in forests throughout the northwest and Canada. Because of this, we keep a constant stock of beautiful Douglas Fir timbers drying in our yards outside of Denver, Colorado. Our timber inventory is “free of heart” center (FOHC) meaning they are cut and milled without the heart (center) of the tree within the perimeter of the piece. The probability of checking is reduced with free of heart timbers often resulting in a very clean frame.
Douglas fir is one of the world’s best timber producers and yields more timber than any other tree in North America. The wood is used for dimensional lumber, structural timbers, pilings, and plywood. The wood is also made into railroad ties, mine timbers, house logs, posts and poles, fencing, flooring, pulp, and furniture.
Color: Can vary in color based upon age and location of tree. Usually a light brown color with a hint of red and/or yellow, with darker growth rings. In quartersawn pieces, the grain is typically straight and plain. In flatsawn pieces, (typically seen in rotary-sliced veneers), the wood can exhibit wild grain patterns.
Grain: Generally straight with medium to coarse texture and a decent natural luster.
Characteristics: Machines well and accepts stains, glues, and finishes well.
Western Red Cedar
Western Red Cedar is a commercially important lumber, used in a number of applications ranging from rough-sawn lumber for use in home construction to clear quartersawn material for classical guitar soundboards. It has a strong, aromatic scent when being worked.
Color: Heartwood reddish to pinkish brown, often with random streaks and bands of darker red/brown areas.
Grain: Straight grain and a medium to coarse texture.
Characteristics: Used for shingles, exterior siding and lumber, boatbuilding, boxes, crates, and musical instruments.
Western Hemlock is native to the west coast of North America, with its northwestern limit on the Kenai Peninsula, Alaska, and its southeastern limit in Sonoma County, California.
Color: Heartwood is light reddish brown. Sapwood may be slightly lighter in color but usually isn’t distinguished from the heartwood. The conspicuous growth rings can exhibit interesting grain patterns on flatsawn surfaces.
Grain: Generally straight, with a coarse, uneven texture.
Characteristics: Used for structural timber, boxes, pallets, crates, plywood, framing, and other construction purposes.
Red & White Oak
Red and white oak are the most abundant hardwood species available in North America. Oak was a favorite of early English craftsmen and a prized material for American Colonists. White oak is just one of 86 oak species native to this country, but it is the classic oak of America. Red oak grows only in North America and is found further north than any other oak species. A big, slow growing tree, red oak takes 20 years to mature and lives an average of 300 years.
Color: White Oak ranges from nearly white sapwood to a darker gray brown heartwood. Red Oak ranges from nearly white cream color to a warm, pale brown heartwood tinted with red.
Grain: The grain is distinguished by rays, which reflect light and add to its attractiveness. Depending on the way the logs are sawn, many distinctive and sought after patterns emerge, such as flake figures, pin stripes, fine lines, leafy grains and watery figures.
Characteristics: Heavy, very strong and very hard, stiff, durable under exposure, great wear-resistance, holds nails and screws well.
Southern Yellow Pine
Southern Yellow Pine is native to the eastern United States from southern New York to northern Florida, west to the extreme southeast of Kansas, and southwest to eastern Texas.
Color: Heartwood is reddish brown, sapwood is yellowish white.
Grain: Straight grained with a fine to medium texture.
Characteristics: Commonly used for construction, such as stringers, roof trusses, poles, joists, piles, as well as interior applications.
Eastern White Pine
A very large tree with relatively few horizontal big limbs, the Eastern white pine is one of the tallest timber trees in the Northeast.
Color: White to pale yellow with a reddish tinge. It darkens with age and air exposure, eventually turning to a deep orange color.
Grain: The wood is light, soft, straight grained and with very uniform texture.
Characteristics: It works very well and is easily shaped with hand and power tools. This wood accepts many types of glue well, making for tight bonding.
* There are other wood species we can use upon your request like Cypress, Walnut, Birch, Spruce, White fir and more upon your request.
There’s a growing demand in the market right now for wood that has been reclaimed from old buildings such as churches, barns, factories, and schoolhouses. The use of reclaimed timbers is environmentally conscious while also giving your home a unique story.
While we can source reclaim wood from older structures that are being disassembled, the timing and availability of repurposed material greatly varies. If your preference is to use reclaimed timbers in the construction of your home, contact us as early in the process as possible, especially if you are looking for a specific species of wood. Reclaimed timbers need to either be x-rayed for nails and hardware before they can be put through our machine or each piece will need to be cut by hand, both of which are expensive and time consuming. As a more affordable option, we can re-create the look of reclaimed timbers with a variety of textures and finishes. We can hand hewn, wire brush, and even add axe marks and nail holes to create a weathered and distressed look.
Preparation and Drying Process
Proper Preparation & Time-Tested Practices: Beyond your choice of woods, the method in which your timbers are prepared before they’re cut will also influence the frame’s strength and appearance.
Most companies cut their timber “green”, meaning that it comes fresh from the forest to the sawmill. Green timbers contain high moisture content, often over 40%. As green timbers dry, often, bowing, twisting, shrinking, and warping can occur, affecting the stability and appearance of the overall structure. We can provide green timbers for those who desire them, however, our high, dry climate in Colorado allows us to properly air-dry our timbers in a controlled environment prior to being cut.
To facilitate the air drying process, we sticker each timber with 4x4s, setting them on blocks to expose their ends to the open air. Air-dry timbers go through a gradual drying cycle until they reach a moisture content of 19% or less which is what the West Coast Lumber Inspection Bureau (WCLIB) considers to be air dried. Moisture content is measured as a ratio of the weight of the water in the wood relative to its dry weight and is given as a percentage (%MC). A moisture meter reader is a special instrument we use to test moisture content prior to fabrication. This tool is inserted in the timber to ensure that it’s 19% or less.
Air-drying is the most organic and thorough drying process available, allowing timbers to acclimate naturally. It is an option unique to our location and high, arid climate outside Denver, Colorado, giving us an advantage that very few timber frame manufacturers have accessible. We have found this to be the most inexpensive and effective way to dry our wood before it’s cut, however, we offer other alternatives for pulling moisture as well.
Convention Long Cycle Kiln
Convention long cycle kiln drying process takes about 30 days of two 15 day cycles. The initial 10-15 day rotation penetrates the first 2” of the timber. It then comes out for a week to cool down so that any moisture trapped in the middle can migrate to the outside again. The second 10-15 day cycle actually pulls moisture from the center of member, resulting in 19% or less moisture content at the center.
Another method is to use radio-frequency kilns to dry the wood. These timbers are commonly referred to RFKD (radio-frequency kiln-dried) timbers. While Colorado Timberframe does offer this as a service in cases where time is of the essence, it is much more expensive. Radio-frequency kilns act like microwave ovens, drying timbers from the inside out. While this is superior to kiln-drying, “processing” logs in this way can make their fibers respond in unexpected ways. It can make the wood twist and check more, because the “microwaving” shocks the tree’s core. Despite these possible issues, we have had good success with this process for a number of clients so believe it is a viable method if the homeowner desires.
The trees we use are responsibly harvested by reputable providers. If requested, we also have the ability to get Forest Stewardship Council (FSC) certified timbers.
Common Timber Frame Joinery
Colorado Timberframe takes artistic pride in building both traditional timber frame and post and beam style structures. Both construction techniques use heavy squared off timbers rather than dimensional lumber creating a carefully constructed skeleton that becomes the primary visual element of the building. Exposed timberwork has become a mainstay in true mountain style architecture. The main difference between the two is how the timbers are connected. Traditional timber framing is an ancient building technique that utilizes precision cut mortise and tenon joinery secured by wooden pegs.
In comparison to traditional timber frame, post and beam utilizes fasteners in the form of metal bolts, screws, rods and steel plate connectors to join adjacent members together. We occasionally employ metal hardware in our designs to meet modern engineering and code requirements, however, most of the time it can be hidden. Colorado Timberframe can provide either option. The decision to use either method comes from the direction given by the client based on cost and the desire for authenticity.
A Spline is a smaller member that passes through an open mortise in the post. Two larger opposing beams are joined at the post and pegged together.
King Post Collar Assembly
The King post and struts are connected directly to the collar tie beam, however, struts can also be connected to the King Post. A King Post truss spreads out the weight of the roof to load bearing walls.
Housed Birds Mouth
A rafter foot meets the plate.
Housed Rafter Tenon
A rafter tenon slides in to an open mortise and secured by two pegs.
The recessed dovetail wedge interlocks with a tenon securing two members together. It is commonly used to connect roof purlins securely to joists.
Housed Tenon Connection
A tenon slides directly in to a mortise at 90 degrees and is secured by two pegs.
Housed Ridge King Post Connection
The top of the King post is housed with a recessed wedge which slides in to the roof’s purlin ridge beam.
King Post Rafter Connection
Rafters connect to the top of the King Post with a housed tenon and is secured typically by three pegs. This upper king post joinery is a classic and strong connection.
Timber Frame Trusses
King Post Truss
King Post trusses have a central vertical post working in tension to support a beam below from a truss above. A King Post truss spreads out the load bearing on the roof.
Arched Collar Tie King Post Truss
Two arched collar ties connect to the king post from a truss above.
Two bottom chord members cross each other, connecting to the angled top chords, creating an appearance similar to an opened pair of scissors.
Hammer Beam Truss
Hammerbeam trusses are decorative and open, first seen in English Gothic architecture. It requires more components and joinery but uses shorter size members rather than long lengths of timber.
Queen Post Truss
A queen post is a tension member in a truss that can span longer openings than a king post truss. A king post uses one central supporting post, whereas the queen post truss uses two.
Modified Queen Post Truss
This truss has both a central king post and also two supporting posts on either side of the king post.