Engineering News-Record recently featured Forest Products Laboratory’s (FPL) materials research engineer, Laura Hasburgh and her expert consultation on the Ascent construction project in Milwaukee. At 25 stories, the Ascent building is making history as the soon-to-be tallest timber building in the world. And because of its unprecedented height and exposed mass timber interior, Hasburgh was contacted to lend her fire testing expertise.
The top eighteen floors of the Ascent will be framed in mass timber and the interior architectural design features exposed glued-laminated timber (glulam) framing and cross-laminated timber (CLT) slabs to showcase the natural beauty of the wood. But with these design and material choices, the Ascent’s fire safety planning needed to be carefully considered.
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.
Thanks to Grant Kirker for writing this fascinating look back into Forest Products Laboratory (FPL) history and science. Kirker is a Research Forest Products Technologist at FPL in the Durability and Wood Protection Research unit.
Throughout its 110-year history, FPL has participated in groundbreaking wood research both nationally and internationally. The FPL research libraries contain a virtual treasure trove of information pertaining to the wise use of wood and wood-based materials. Historical overviews like this would not be possible without them.
One of the earliest endeavors at the newly established Forest Products Laboratory, then located at 1509 University Avenue in Madison, Wisconsin, was the testing of preservative treated wood for the expanding railroad sector in the US. The swift growth of railways across the country had created a huge demand for suitable hardwoods. But high decline rates due to wood rot fungi was a constant concern leading to an unreasonable amount of wood being used to replace rapidly rotting railroad ties. The dawn of wood preservation research at FPL was aimed at increasing the service life of rail ties to reduce the demand on America’s forests.
A tenacious fungus, a conspiracy theory, a historic ship, a unique gift from Princeton University, and two Forest Products Laboratory (FPL) researchers, Grant Kirker and Samuel Zelinka, collaborating with researchers from Germany and Canada all converged in the right order of events to produce some of the most significant advances in wood salt damage understanding in over twenty years.