Cross laminated timber

Building products

Evergreen Engineering grew out of the wood products industries in the Northwest United States, and wood products – solid, composite, and engineered – remain a major segment of our business. We have completed thousands of projects all over the United States and into eastern Canada, up to and including complete greenfield plants. Evergreen has the strongest technical team in the industry for Engineered Wood Products (EWP) – including LVL and I-Beams. Evergreen and its staff have been heavily involved throughout the development of these technologies.

Evergreen appreciates the importance of project planning. We can help to formulate and assess options and tradeoffs early in the planning phase, to achieve maximum leverage and opportunity for success. We can then assist with project scope definition, accurate cost estimation, payback justification, detailed engineering, even construction management, commissioning, and start-up.


For more than three decades, Evergreen Engineering has been designing new facilities and upgrading existing facilities in the wood products industry. We design new safety systems, develop new environmental controls, install power generation and distribution, and improve processes, helping mills across North America remain competitive with greater safety, recovery and speed.

Cross-laminated timber (CLT)

Evergreen has been at the forefront of CLT manufacturing plant engineering in the U.S. from the beginning, assisting our clients in the lumber manufacturing space with project charter, preliminary engineering, and pro forma studies to enable this next-generation wood product to scale up in well-designed production facilities.

Throughout the Northwest and across the nation, our clients rely on our technical expertise for process design, equipment selection, project envelope, and balance of plant engineering to bring their visions to reality. Currently in various phases of development, Evergreen is designing three separate facilities with significant degrees of automation, innovation, and unique challenges.

Clients are confidential at this time but we look forward to announcing these projects along with our clients and partners.

Laminated veneer lumber (LVL)

Evergreen Engineering has developed and designed more than a dozen greenfield LVL facilities, including the world’s largest In Torzhok, Russia. Our design parameters included:

  • New plant, multiple LVL presses
  • Veneer drying and grading
  • LVL cut-up, stacking, bundling
  • Building modification and additions
  • Pollution control equipment
  • Layouts, design, and construction management
  • New thermal oil systems

We are proficient in all process areas, from raw material handling to finished LVL, and are particularly adept with integrating process operations with utilities and central systems.

We have also been proactive in understanding and developing tools to deal with crucial LVL plant issues such as raw materials supply, energy conservation, and environmental controls – we can provide innovative solutions in these critical areas.

Medium-density fiberboard (MDF)

Evergreen was the primary engineer for a greenfield MDF plant that produces 210-mm ft2, sanded thin-board MDF with a continuous roll-type press utilizing Southern Pine chips and sawdust and urea-formaldehyde resin.

We overcame significant environmental challenges by visiting operating plants in Canada, Germany, and Italy to resolve equipment selection issues and designed a state-of-the-art air emission abatement system and a PLC controlled fiberoptic ethernet data highway.

Glu-lam beams

Evergreen has partnered with glu-lam manufacturers on a number of projects, including both facility engineering and product engineering, ensuring that the custom manufacture of this mass timber mainstay is structurally and economically sound. If you are considering the addition of glu-lam capability to your lumber or mass timber operation, Evergreen Engineering can help.


We have performed a study to convert an existing particleboard plant to an MDF plant, and provided preliminary engineering to install new disk screens at the SierraPine particleboard plant in Martell, California. We also engineered Flakeboard’s expansion of its particleboard operations in St. Stephens, New Brunswick, Canada.

At Bohemia, Inc. in Eugene, Oregon, we redesigned the raw material end of an existing 75-million square foot 3/4″ particleboard plant to reduce particulate emissions and improve board quality. This involved replacing pneumatic furnish handling conveyors with belt conveyors and replacing older screens, mixers, and related systems with new equipment. The result was a more modern and cost-effective mill.

We rebuilt an entire particleboard line, from the truck dump through the press hydraulics and the board cooling system, in Missoula, Montana. The project involved civil, structural, mechanical, and electrical engineering, and delivered improved plant productivity and product quality by improving mat cross-panel density and decreasing cycle time.

Plywood and veneer

Our projects have included a new plants for Champion International in Camden, Texas; Springfield Forest Products in Fitzgerald, Georgia; and International Paper in Spring Hill, Louisiana; construction management and veneer dryer restoration and scrubber design for Springfield Forest Products in Springfield, Oregon; block heating vat design for Murphy Plywood in Sutherlin, Oregon and Boise Cascade Corporation in Florien and Oakdale, Louisiana; and new lathe installation and energy studies at five Louisiana-Pacific plants in Louisiana and Texas.

Oriented strandboard (OSB)

Evergreen has been active for many years in the development and utilization of agricultural fibers as an annually-renewable raw material resource. Often an environmental liability, agrifiber offers a sensible alternative to wood fiber for many applications.

We are California Agriboard’s engineer on the EPC team to design and construct a new greenfield MDF plant using rice straw. Our involvement has included assisting with product prototyping and testing at laboratories in the U.S. and Europe, and providing preliminary engineering including process, layouts, equipment definition, capital cost estimation, and permitting.

We are also consulting with two small-scale board production facilities in Hubbard, Oregon who are utilizing exotic fibers such as seed hulls, hemp, viticulture residues and empty fruit bunches to produce decorative architectural board for specialty construction.