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 | Feb 6, 2015
Obama executive order requires federal construction projects to consider flood damage caused by climate change
To meet the new standard, builders must build two feet above the currently projected elevation for 100-year floods for most projects.
HVAC | Feb 6, 2015
ASHRAE, REHVA publish guide to chilled beam systems
The guide provides tools and advice for designing, commissioning, and operating chilled-beam systems.
Codes and Standards | Feb 2, 2015
AGC working with EPA on website to help with environmental rule compliance
The goal is for the site to be improved to make it easier for construction contractors to learn how to comply with federal and state environmental guidelines.
| Feb 2, 2015
New York law requires informing firefighters of wood truss construction
New York enacted a law that could make firefighting a bit safer by mandating property owners inform government and first-responders when they build or rehabilitate a building using "truss-type" pre-engineered wood or timber.
| Jan 14, 2015
Ontario code changes boost accessibility for people with disabilities
The new amended Ontario building code includes several provisions that improve accessibility for those with disabilities.
| Jan 14, 2015
American Concrete Institute releases Spanish edition of structural concrete code
New York City last year adopted the National Institute of Standards and Technology (NIST) recommendation to require additional exit stairways in high-rise buildings.
| Jan 14, 2015
Terrorism Risk Insurance Act renewed
President Barack Obama signed the Terrorism Risk Insurance Act law on Jan. 12.
| Jan 9, 2015
Academy of Art in San Francisco under fire for code violations
The fast-growing Academy of Art is under intense scrutiny by the City of San Francisco for code violations.
| Jan 9, 2015
New law mandates storm shelters in Illinois schools
An Illinois law took effect on Jan. 1 that requires all new and remodeled schools to have storm shelters.
| Jan 9, 2015
New OSHA regulations on reporting workplace deaths, hospitalizations take effect
As of Jan. 1, all employers under the jurisdiction of OSHA are required to report all work-related fatalities within eight hours and all in-patient hospitalizations, amputations, and losses of an eye within 24 hours.
