APA Releases Findings from December 2015 Tornado Damage Assessment
In December 2015, the Dallas suburbs of Rowlett and Garland, Texas were heavily damaged by tornadic activity. The National Weather Service reported that the weather system included as many as 12 tornadoes. It was estimated that the winds in the Garland-Rowlett tornado were between 170 miles per hour and 180 miles per hour. The report generally found that structural failures occurred at toenailed rafter connections; envelope breaches due to window/door damage; and the use of flexible wall sheathing (laminated fiber sheathing).
The full report can be reviewed here: Damage Assessment Report: Texas Tornado.