New Strength And Safety Tests Pit Timber Against Concrete And Steel

Thanks to innovative construction materials like cross-laminated timber (CLT) and laminated veneer lumber (LVL), wooden buildings are no longer mere houses made of sticks.

Attracted by the aesthetic and environmental benefits of timber, structural engineers have overseen a lumber comeback, from Landlease’s International House development in Sydney’s Barangaroo district to Brisbane’s newly completed 25 King, which is the world’s tallest commercial timber building.

But with ambitious projects in Tokyo, Chicago, and London eyeing far greater heights for timber as a building material, engineers and the public need to be assured wood can match up with concrete and steel when it comes to safety and stability.

That’s why Griffith University’s Associate Professor Benoit Gilbert has been putting timber to the test, using high-tech machinery to better understand how timber behaves in a variety of situations.

Gilbert’s current tests focus on progressive collapse, a term that describes the severe failure of a structure due to something going wrong in one part of it. That could be a gas explosion, a fire or if a car were to collide with the building.

Read more on this from Create at https://www.createdigital.org.au/strength-safety-tests-timber/.

Katerra Acquires Timber Construction Pioneer Michael Green Architecture

Tall timber construction, hyped as one of the next big things in architecture and construction, has slowly gained traction as a small number of multistory projects have started to showcase the possibilities of a more sustainable type of building. A new business deal between a construction startup and a pioneer in tall timber design may help speed up more widespread adoption of this technology.

Earlier this year, Katerra, a Silicon Valley startup focused on the construction industry, received $865 million in funding from the SoftBank Vision Fund, a billion-dollar venture capital firm that has invested in leading startups such as Uber. Katerra has used some of its sizable bankroll to acquire Michael Green Architecture Inc. (MGA), a Vancouver-based firm and one of the pioneers of tall timber construction.

Katerra, which bills itself as a tech firm, has pitched itself as a disruptor in the staid construction industry, suggesting that its innovative technology, and focus on vertically integrating the building process, will allow it to build better, faster, and cheaper than conventional firms.

The acquisition of MGA, the eponymous firm whose founder is considered one of the leaders in tall timber design and architecture, suggests they see wooden buildings as a big part of the solution.

Currently valued at $3 billion, Katerra has built a sizable construction firm since launching in 2015. The Menlo Park, California-based company employs 1,500 people, has booked more than $1.3 billion in new projects, and has constructed an operational facility in Phoenix to manufacture its own material. The company’s goal is to be a one-stop shop, offering design, manufacturing, and construction services.

From Curbed.com: https://www.curbed.com/2018/5/30/17409466/construction-startup-tall-timber-katerra-michael-green

The Wooden Skyscrapers That Could Help To Cool The Planet

One building stands out in the old logging town of Prince George, Canada. Encased in a sleek glass facade, the structure towers above most of its neighbors, beckoning from afar with the warm amber glow of Douglas fir. Constructed almost entirely from timber in 2014, the 8-story, 30-meter building is among the tallest modern wooden structures in the world. But it is more than an architectural marvel. As the home of the Wood Innovation and Design Centre at the University of Northern British Columbia (UNBC), it is also an incubator for wooden buildings of the future — and a herald for a movement that could help to tackle global warming.

The building is less like a log cabin and more like a layered cake, constructed from wooden planks glued and pressed together, precision cut by factory lasers and then assembled on site. All told, the university avoided the release of more than 400 tons of carbon dioxide by eschewing energy-intensive concrete and steel, and the building locks up a further 1,100 tons of CO2 that was harvested from the atmosphere by British Columbian trees. In total, that’s enough to offset the emissions from 160 households for a year.

Wooden construction has ancient roots, but only in the past two decades have scientists, engineers and architects begun to recognize its potential to stave off global warming. By substituting concrete and steel with wood from sustainably managed forests, the building industry could curb up to 31% of global carbon emissions, according to research by Chad Oliver, a forest ecologist at Yale University in New Haven, Connecticut. In time, such a shift could help humanity to pull CO2 out of the atmosphere, potentially reversing the course of climate change.

“It’s the plywood miracle,” says Christopher Schwalm, an ecologist at Woods Hole Research Center in Falmouth, Massachusetts. “This is something that could have a significant impact on the riddle that is global environmental change.”

From Nature.com: https://www.nature.com/news/the-wooden-skyscrapers-that-could-help-to-cool-the-planet-1.21992

Freres Lumber Unveils MPP, Adding Plant In 2017

Freres Lumber Unveils MPP, Adding Plant In 2017

Capitalizing on the current interest in building large-scale wooden buildings and more multi-story wooden structures, longtime Oregon plywood and veneer producer Freres Lumber has introduced the “Mass Plywood Panel” (MPP), a veneer-based engineered wood product that’s been more than a year in development while being tested and refined in conjunction with Oregon State University.

Calling the MPP the “first veneer-based product of this size and scale that’s been proposed to the marketplace,” Freres Lumber Executive Vice President Rob Freres says the MPP development represents the kind of innovative investment required to differentiate the company, add value and stay on the leading edge of product development and new technology.

Freres Lumber is adding an MPP plant near its Lyons, Ore. veneer plant and its Mill City, Ore. plywood plant. The facility is starting with a scarfing line and test press in early 2017, with a building planned for completion by late third quarter and commercial production to begin by late 2017.

“This will allow us to test panels and gain certification,” Freres says, adding he believes MPP will qualify under LVL and CTL standards.

A week after announcing the new product, Freres reps displayed MPP at the North American Wholesale Lumber Assn.’s Trade Market trade show in Las Vegas in late October. In a blog post on Freres Lumber’s web site, plywood sales rep Bob Maeda noted an “overwhelming response” to the product.

He added that Freres officials had “great discussions with many industry experts about product opportunities” that include crane mats, large cross-laminated timber (CLT) -like floor panels, solid wall panels, concrete forming applications, solid structural columns, scaffold planking, long length scarfed panels, furniture applications and more. “We have had a lot to digest and think about, but the opportunities seem to be many, and that is the exciting part,” Maeda posted.

Freres says the MPPs can be produced in dimensions up to 12 ft. wide, 48 ft. long and 12 in. thick. He believes a veneer-based mass building panel is more appropriate than the lumber-based CLT mass panel because defects are more easily removed during veneer production, and early research shows MPPs may reach the same strength values as CLT but using 20%-30% less raw material.

In addition, he says, the veneer layup process gives the MPP more engineering flexibility when it comes to meeting customer needs. MPP’s relative lightness, plus the aesthetic aspects of veneer add to MPP’s competitive benefits, Freres believes.

Moving ahead, Freres says, “We’re going to be testing a lot of different combinations and veneer thicknesses.” He believes MPP will be able to match the properties that engineers, builders and architects are looking for but with less raw material.

“It’s really exciting,” Freres says. “We’re looking at a multitude of different types of products, and it’s really a way to diversify and not be so reliant on standard commodity products.”

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Canadian Building Will Be The Tallest Timber Structure In The World

Vancouver-based real estate developer PortLiving and world-renowned Japanese architect Shigeru Ban have unveiled plans for an upcoming hybrid timber structure said to be the tallest in the world. If so, this would mean it will be higher than other CLT wood structures, such as the 34-story design planned for Stockholm.

The residential high-rise Terrace house, which will be located in Vancouver’s Coal Harbor neighborhood, may set a new standard for urban luxury in design, sustainability and engineering innovation. The high-rise will feature a cross-laminated timber frame supported by a concrete and steel core. Wood for the project will be locally sourced from British Columbia, minimizing its carbon footprint.

Cross-laminated timber has been gaining popularity as of late, due to its lightness, sustainability, and ease of use. Planks of timber are glued and orientated at 90 degrees to each other, and are then crosslaid in layers. Those pieces are then shipped to construction sites and can be assembled by just a few workers, even for large buildings.

Its use in tall wooden buildings has also been growing. London, Stockholm, and Quebec are just a few of the cities who either already have large timber towers or have one in the works. Recent plans include a Swedish firm’s 436 ft. residential wood skyscraper in Stockholm, while a 12-story mixed wood high-rise is planned for construction in Portland, Oregon.

Building codes are being adjusted in Oregon and Washington State to permit the tall wood structures. But CLT hasn’t gone without opposition.

From Woodworking Network: https://www.woodworkingnetwork.com/news/woodworking-industry-news/canadian-high-rise-will-be-tallest-timber-structure-world?ss=news,news,woodworking_industry_news,news,almanac_market_data,news