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Title: Development of a ready-to-assemble tornado shelter from cross-laminated timber (CLT): impact and wind pressure testing

Source: Gen. Tech. Rep. FPL-GTR-266.

Author(s)Falk, Robert H.; Bridwell, James J.; Williamson, Tom ; Black, Todd

Publication Year: 2019  View PDF »

Category: General Technical Reports
Associated Research Project(s):   FPL-4714-3B

Abstract: The development and use of tornado shelters have helped reduce loss of human life associated with extreme weather events. Currently, the majority of shelters are built from either steel or concrete. The development of the cross-laminated timber (CLT) industry in the United States has provided an ideal wood product to resist the debris impact and high wind forces associated with tornados. This report overviews the design and development of a residential tornado shelter constructed from CLT. This design was impact- and wind-pressure-tested according to the core requirements of the International Code Council Standard for the Design and Construction of Storm Shelters. Results indicate that a residential tornado shelter constructed of four-ply CLT walls, a three-ply roof, and a four-ply door can safely resist the impact of a 15-lb wooden missile traveling at 100-mi/h (mph)—the most severe impact test included in the ICC/NSSA-500 standard. Lateral load and uplift load testing indicated that the four-ply shelter can resist the applied pressure caused by a 250-mph wind, as calculated from wind load design criteria. More testing would be required to verify the performance of a CLT shelter intended for commercial or institutional applications.

Keywords: Tornado; impact testing; cross-laminated timber; safe room

Publication Review Process: Informally Refereed (Peer-Reviewed)

File size: 4,096 kb(s)

Date posted: 05/29/2019

This publication is also viewable on Treesearch:  view
RITS Product ID: 94162
Current FPL Scientist associated with this product
Falk, Robert H.
Research General Engineer

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