Blast tests on three existing two-story, single-bay cross-laminated timber (CLT) structures at Tyndall Air Force Base were successful, according to WoodWorks, a program working with the Wood Products Council.
“On-site observations were decidedly positive; all structures remained intact under significant explosive loading well beyond their design capacity,” according to a council news release. This was the second phase of blast testing on CLT structures conducted by WoodWorks.
“Last year, we tested the structures under their own self-weight,” said Bill Parsons, vice president of operations for WoodWorks. “Those tests were successful and, this year, we built on that effort by testing whether the design methods established as a result of those initial tests needed to be adjusted when the buildings carried typical gravity loads and included different connection configurations, increased panel thickness, and alternate mass timber wall systems.”
One building used 5-ply CLT front wall panels, the second used off-the-shelf prefabricated angle brackets, and the third included nail-laminated timber (NLT) front panels. All three structures remained standing following the fourth and largest blast, intended to take the structures well beyond their design intent. While panel rupture was observed on all front and side wall panels, the buildings maintained enough residual capacity to remain intact and safe to enter, the release says.
Related Stories
Sponsored | BD+C University Course | Feb 17, 2022
Metal roofing trends
New ideas in design and constructability are radically changing how metal systems are used as roofing for commercial and institutional buildings. Behind the investment in these new kinds of expressions and construction approaches is a growing interest in improved performance and reduced environmental impact. Metal roofing systems can cut cooling and heating loads significantly, according to the EPA.
Codes and Standards | Feb 17, 2022
Pandemic won’t alter urban planning
City planners focused on returning to ‘old normal’.
Codes and Standards | Feb 16, 2022
California court rules affordable housing developers exempt from local zoning
Case could set precedent on state law that overrides local rules.
Codes and Standards | Feb 15, 2022
FORTIFIED resiliency standard expanded to include multifamily sector
Voluntary, beyond-code program aims to protect buildings from severe weather.
Codes and Standards | Feb 10, 2022
Number of Americans at risk of flooding to double in 30 years
Most new risk from new development, not climate change.
Codes and Standards | Feb 10, 2022
Intl. Code Council committee on diversity seeks applicants
New board aims to increase diversity in the membership association.
Codes and Standards | Feb 9, 2022
Climate impact of gas stoves in U.S. equal to half a million cars
New study could increase momentum to ban fossil fuels in new buildings.
Codes and Standards | Feb 7, 2022
Energy efficiency ratings not reflecting true energy use
Highest rated U.K. buildings are less efficient than lower rated ones.
Codes and Standards | Feb 3, 2022
Illinois tops USGBC list of states with the most LEED certified projects in 2021
Top 10 states plus D.C. certified more than 247 million gross square feet.
Codes and Standards | Feb 2, 2022
Public works contracting reform advances in New York State
Governor signs bill to form advisory council that will propose policy changes.