by Web Editor | Aug 17, 2018 | News
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/.
by Web Editor | Apr 4, 2018 | News
Katerra, a high-tech construction firm, has secured $865 million in funding from SoftBank Vision Fund. That money will go toward ongoing projects in the U.S., like the company’s planned cross-laminated timber plant in Washington, as well as research and development activities.
Katerra says its upcoming 250,000-square-foot Washington plant will help scale up U.S. production of CLT so that the material can be more broadly adopted across the construction industry. Katerra’s manufacturing presence in the region will provide hundreds of jobs and stimulate additional jobs through the larger supply chain and associated industries, including design, engineering, and construction. More than 150 construction-specific jobs will be created to build the CLT factory.
Cross-laminated timber, or CLT, is a key ingredient in the so-called timber towers – multi-story high rises built of wood, some reaching 18 stories or higher. Katerra says CLT is valued due to its low carbon footprint and strength.
“CLT… is a material that creates beautiful spaces, is designed for manufacturing, and is sustainable all at the same time,” said Michael Marks, chairman and co-founder of Katerra. “This material represents a great opportunity to create new value within the construction industry and will be central to many of the projects we’ll be designing and building. We feel very comfortable and excited, particularly with the knowledgeable team we have, to make the jump into manufacturing mass timber. We are ready to help bring mass timber to the mainstream of U.S. construction.”
Katerra is already applying its high-tech construction techniques to manufacture building sections in an existing Phoenix factory, in processes similar to auto plants. The Phoenix plant uses CR Onsrud and Laguna machinery, and fabricates rooms and building sections, including cabinetry, plumbing and wiring.
From Woodworking Network: https://www.woodworkingnetwork.com/news/woodworking-industry-news/katerra-receives-865-million-fund-massive-cross-laminated-timber?ss=news,news,woodworking_industry_news,news,almanac_market_data,news,canadian_news
by Web Editor | Nov 20, 2015 | News
Portland is growing up—adding high-rises, increasing density, and pricing many people out. But two local firms are exploring a state-of-the-art building material that could help solve the city’s affordability problem, create living-wage jobs in rural communities, and help save the planet. It’s wood.
Right now, Portland-based LEVER Architecture and real estate development firm Project^ are designing a 12-story mixed-use wood building in the Pearl District that will be made primarily of a material called cross-laminated timber (CLT).
That’s an unheard of height for wood structures, which top out at six stories in most of the US. And it’s not the project’s only unique attribute. Five of those stories will be affordable housing, something Portland desperately needs.
LEVER and Project^ have partnered with Beneficial State Bank (which owns the property at 430 NW 10th), Albina Community Bank, and the housing agency Home Forward on the development, which they’re calling Framework.
The team’s ideas received national attention: In September, the US Department of Agriculture awarded the project a $1.5 million grant—money that will help alleviate the cost of proving to state and local building authorities that tall wooden buildings can meet safety requirements for earthquakes, fires, and other perils.
From The Portland Mercury: https://www.portlandmercury.com/portland/the-worlds-most-sustainable-high-rise-construction-material-is-wood/Content?utm_source=WIT112015&utm_medium=Email&utm_campaign=WeekInTrees&oid=16991973
