Architect Butch Grimes, who examined the wreckage after a half-mile tornado struck Tuscaloosa, Ala., believes toughening building codes can reduce damage from twisters.
“The damage we had on the edges [of the tornado] could have been avoided with simple construction techniques,” Grimes told Scientific American.
The strongest hurricane winds on the coast can reach 180 mph, while the strongest tornadoes, category EF-5, have wind speeds of 200 to 250 mph. Tornadoes that strong are rare, with more common lower-category EF-2 or EF-3 tornadoes having wind speeds in the 100- to 150-mph range. The lower wind speeds, around hurricane strength, are most common on the edge of tornadoes.
“It’s probably not practical to design for EF-5 damage,” Grimes said. Weaker storms, however, can and should be designed for as coastal areas have been doing for years, he said.
Hurricane clips are one potential quick fix. In Alabama, the clips are required for buildings built within 5 miles of the Gulf of Mexico but remain optional farther inland. Reinforced windows could be another effective measure.
(http://www.scientificamerican.com/article/tornado-survival-could-improve-with-better-building-codes/)
Related Stories
Codes and Standards | Oct 19, 2020
NEXT Coalition chooses five pilot projects to fight COVID-19 on jobsites
Mobile platforms, wearable sensors, AI video systems among the trial solutions.
Codes and Standards | Oct 15, 2020
Neighborhoods Now offers cost-effective, DIY designs in response to COVID-19 pandemic
Designs include barriers for outdoor dining, sidewalk retail displays, and modular seating for public spaces.
Codes and Standards | Oct 14, 2020
Standard contract document for prefab and modular building released
ConsensusDocs addresses the most common prefabricated construction use-case scenario.
Codes and Standards | Oct 13, 2020
Austin is first major Texas city to adopt wildfire code
New ordinance based on the International Wildland-Urban Interface Code.
Codes and Standards | Oct 12, 2020
Guidance offered for K-12 schools to support students with asthma
Green purchasing policies for cleaning, filters, furniture and other products encouraged.
Codes and Standards | Oct 7, 2020
More energy efficiency programs are encouraging zero-energy projects
At least 20 programs for new construction, major renovations emerge.
Codes and Standards | Oct 6, 2020
LEED, GBCI rating systems spur resilience-enhancing strategies
Expanded programs, resources address impact of climate change.
Codes and Standards | Oct 6, 2020
International Code Council to hold inaugural online education event
Week-long ICC Learn Live will include panel conversations, keynotes, and breakout sessions around key topics in building safety.
Codes and Standards | Oct 5, 2020
Guides addressing fenestration anchorage updated
First update to decade-old technical documents released.
Codes and Standards | Oct 1, 2020
Deadline extension for LEED 2009 project certifications
Delivery timeline delays due to COVID-19 pandemic prompt action.
