Forest Products Laboratory’s (FPL)Brian Brashaw was featured in an National Public Radio (NPR) segment about the soon-to-be world’s tallest timber building currently under construction in Milwaukee, Wisconsin. The Ascent building will boast 25 stories, 18 of which will be framed in mass timber. The upscale apartment complex is slated for completion in 2022. Right now, the cement foundation is being laid. Brashaw anticipates the Cross Laminated Timber (CLT) “to start flying,” or rather, construction crane hoisted pre-fabricated mass timber sections to begin installation in early summer 2021.
FPL is excited about its participation in helping the Ascent rise among the tallest modern wood structures in the world.
For the past 58 years, the third week of October has been deemed National Forest Products Week by Presidential proclamation. Here at the Forest Products Laboratory, every week is Forest Products Week, but we’re extra happy to celebrate this particular week with partners and the public, sharing all the good things trees provide.
To kick off the week, you can read a blog post below featured on the U.S. Forest Service and USDA blogs. Be sure to follow us on Twitter @fsWoodLab and #ForestProductsWeek to keep up with all the fun facts supporting what we already know: Wood is Good!
Forest Products Laboratory researchers conducted fire testing on a two-story cross-laminated timber (CLT) structure. Watch the short video below to see these one-bedroom apartments go up in flames, and to find out how CLT performed in the heat of the moment.
You can read more specifics about the tests in this previous LabNotes blog post, or if you’re really into the details and data, check out the full FPL general technical report.
New video footage has been released of blast testing performed on cross laminated timber (CLT) structures, and it’s quite a sight to see.
The Forest Products Laboratory, in cooperation with WoodWorks and the Softwood Lumber Board, led a second round of live blast testing in 2017 at Tyndall Air Force Base in Panama City, Florida.
The charges in the videos were large enough to potentially cause lethal injury, and the structures survived. The objective of these studies was to demonstrate the capability of CLT structures to resist airblast loads, thereby allowing the military to incorporate mass timber materials like CLT into their construction projects.
The following is an update to a previous LabNotes post. The updated version was recently featured on the USDA and Forest Service blogs:
All three structures remained standing after the testing – even tests designed to take the structures well beyond their design intent. (Photo courtesy of Air Force Civil Engineering Center AFCEC, Tyndall Air Force Base)
At the USDA Forest Service’s Forest Products Laboratory (FPL), researchers sometimes get a little destructive. They bend and break wood samples of all sizes, and even shoot lumber out of a cannon at 100 miles per hour.
But explosions? That’s a bit out of their wheelhouse. Not that wood can’t handle it. Particularly when it’s used in engineered products like cross-laminated timber, or CLT, which FPL researchers have studied from many angles, including fire performance, use in earthquake-prone regions, and the effects of moisture on CLT. Made of alternating layers of dried lumber boards stacked at 90-degree angles, CLT is exceptionally strong and stable and can be used as walls, roofs, and floors in mid-rise buildings. Continue reading →