Wood Construction Pushes Forward On Both Sides Of The Border

Wood Construction Pushes Forward On Both Sides Of The Border

 

Mass timber construction is making waves on both sides of the Canada-U.S. border, but factors in each country mean a different pace of progress.

The state of Washington is rapidly moving forward on both green construction and use of advanced wood products, but Washington State Department of Commerce forest products sector lead Brian Hatfield said the state isn’t necessarily ahead of its Canadian neighbor. “In some ways, British Columbia is ahead of us in terms of low carbon building materials,” he said.

In 2017, the Washington State Department of Enterprise Services oversaw a pilot project that built 20 kindergarten through Grade 3 classrooms using cross-laminated timber (CLT) in five school district sites in Washington. “We had a pilot district for five school districts, all single-story schools, and those have gone pretty well. They went up quickly and everyone was impressed,” Hatfield said.

The state’s 2016 supplemental capital budget included $5.5 million for the pilot project, which also measures the efficiencies of using engineered wood products through the construction process.

While Washington is taking steps to increase wood use in construction, the Province of British Columbia has pushed for mass timber and wood-focused design for the previous decade. In 2009, the Province of British Columbia put the Wood First Act into practice, which requires provincially funded projects to use wood as a primary construction material. The B.C. building code was also modified in 2009 to allow for wood buildings of up to six stories.

From Journal Of Commerce: canada.constructconnect.com.

 

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Oregon Becomes First State To Legalize Mass Timber High Rises

Thanks to a recent addendum to Oregon’s building code, the state is the first in the country to allow timber buildings to rise higher than six stories without special consideration.

Portland has become something of a hotbed for timber innovation as of late. Carbon12, PATH Architecture’s eight-story glulam and cross-laminated timber (CLT) tower with a steel core, recently became the country’s tallest timber building and was set to be surpassed by LEVER Architecture’s 12-story Framework. Alas, that project was put on hold due to mounting financial difficulties last month, but it seems the precedent that the project achieved in securing a building permit from the State of Oregon and City of Portland will live on.

The timber allowance comes courtesy of Oregon’s statewide alternate method (SAM), a state-specific program that allows for alternate building techniques to be used after an advisory council has approved the “technical and scientific facts of the proposed alternate method.” The allowance comes after the International Code Council (ICC)–the nonprofit group that Oregon models its building codes after–established the ICC Ad Hoc Committee on Tall Wood Buildings in 2015 to explore the benefits and challenges of using timber in tall buildings.

A Committee Action Hearing was held in April of this year, where the Ad Hoc Committee, made up of code experts, stakeholders, and industry members presented their findings. All 14 of the committee’s suggestions were adopted, introducing standards and best practices for fireproofing, the load-bearing potential of CLT and heavy timber, water resistance, sealing, seismic ratings, and more.

Three new building classifications were introduced as a result: Type IV A, timber buildings permitted up to 18 stories and 270 feet tall, Type IV B, timber buildings with a maximum height of 12 stories and 180 feet, and Type IV C, which is permitted to rise nine stories and 85 feet tall at maximum. The shortest of the timber typologies is allowed to use exposed structural timber as an interior finish, whereas the tallest, type A, must enclose all exposed surfaces and include a three-hour fire-resistance rating for the structural elements.

Read more on this from The Architects Newspaper at https://archpaper.com/2018/08/oregon-legalize-mass-timber-high-rises/.

Minnesota Looking To Attract Mass Timber Producers

A burgeoning industry based on a relatively new type of material may be coming to Minnesota. Known as mass timber, the material is an alternative to steel in building construction. While dozens of buildings constructed with the product are dotted around the country, the majority stand in the Pacific Northwest.

“This type of building product is new to the U.S.,” said Brian Brashaw, a program manager with the U.S. Forest Service. “It’s geared at taller buildings; it’s building more along the lines of four, five and six stories. That product is seeing a lot of growth in the United States.”

Now, local groups and governmental agencies are working on a plan to bring that industry to the Midwest. But before a production facility can set up shop in Minnesota, officials need to know if the right kind of raw materials can be produced in the region.

“This is a feasibility study where we’re taking a closer look at if the Midwest has the lumber production capacity and softwood lumber supply chain in place,” wrote Kristen Bergstrand, of the Minnesota Department of Natural Resources, in an email.

A survey is being sent to 11 sawmills in the region that will help gauge if the state can sustain a mass timber industry. APEX, the local business and economic development organization which is sending out the survey, wants to learn the grade and board footage that mills have produced for trees such as red pine, jack pine, spruce and balsam — all considered viable materials for mass timber.

Read more on this from the Duluth News Tribune at https://duluthnewstribune.com/business/manufacturing/4482202-minnesota-looking-attract-mass-timber-producers.

Cross-Laminated Timber As A Forest Management Strategy

The state legislature earlier this year called on the Washington State Building Code Council (WSBCC) to adopt rules for cross-laminated timber (CLT) use when building residential and commercial buildings. The move represents ongoing efforts to bring CLT into mainstream use for residential and commercial construction, which would create commercial value for the small-diameter trees that are contributing to poor forestland health in Washington state.

For state and federal officials, as well as private stakeholders, that change could hasten restoration work by making tree thinning a profitable endeavor rather than a costly project requiring government funding.

The potential CLT offers was articulated by U.S. Forest Service (USFS) Chief Vicki Christiansen at the 2018 Pacific NorthWest Economic Region Summit in Spokane on July 24. “We can use new opportunities for forest product delivery to help us to improve forest conditions, while also creating jobs and sustaining rural communities. We can implement these new practices by working together and being a good neighbor.”

Forest Service Region 6 covers Washington and Oregon and includes 28 percent of all forestland across Washington. In recent years the federal agency has struggled to conduct forest health work due to “fire borrowing” in which those portions of its budget are used to pay for the high cost of firefighting. During last year’s wildfire season USFS spent $2 billion on wildfire fighting, more than half its budget. There were 50 large fires on USFS land and over 411,000 acres burned, costing the agency $130 million. Over 90 percent of those fires were human-caused. In April, federal legislation sought to end the practice of fire-borrowing by allocating additional long-term funding to USFS to the tune of $2 billion starting in 2020.

A 2014 analysis by The Nature Conservancy and USFS concluded that half a million acres of forestland managed by the federal agency in Eastern Washington were in need of thinning and prescribed burns. Along with the new funding, Christiansen said that they can also “align our best practice policies and guidance with the changing markets that are certainly emerging in the Pacific Northwest.”

Read more on this from The Lens at https://thelens.news/2018/07/31/cross-laminated-timber-as-forest-management-strategy/.