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Abstract
Probabilities of failure are estimated for structures designed in accordance with the wind load provisionis of the Manufacturered Home Construction & Safety Standards (MHCSS) that were in effect at the time of Hurricane Andrew (1992) and for structures designed in accordance with the wind load provisionis of ASCE 7-88. It is concluded that for a 10-year exposure the probability of structural failure in a hurricane-prone area such as Dade County, Florida, using the MHCSS wind load criter is approximately 10 times that determined using the wind load requirements of ASCE 7-88. This same ratio hold for an extra-tropical wind climate such as that of Omaha, Nebraska. For Tuscon, Arizona, this ratio is approximately 5. Test data for various components of traditional manufactured home anchoring systems are examined and it is concluded that the load capacity of these systems is substantailly less than the load capacities implied by the MHCSS and by current standard covering anchoring systems that utilize shallow soil anchors be designed on the basis of factored loads and the preloading be made an integral part of the installation process. A new approach to providing windstrom protection for manufactured homes located in hurricane-prone regions needs to be developed.
Probabilities of failure are estimated for structures designed in accordance with the wind load provisionis of the Manufacturered Home Construction & Safety Standards (MHCSS) that were in effect at the time of Hurricane Andrew (1992) and for structures designed in accordance with the wind load provisionis of ASCE 7-88. It is concluded that for a 10-year exposure the probability of structural failure in a hurricane-prone area such as Dade County, Florida, using the MHCSS wind load criter is approximately 10 times that determined using the wind load requirements of ASCE 7-88. This same ratio hold for an extra-tropical wind climate such as that of Omaha, Nebraska. For Tuscon, Arizona, this ratio is approximately 5. Test data for various components of traditional manufactured home anchoring systems are examined and it is concluded that the load capacity of these systems is substantailly less than the load capacities implied by the MHCSS and by current standard covering anchoring systems that utilize shallow soil anchors be designed on the basis of factored loads and the preloading be made an integral part of the installation process. A new approach to providing windstrom protection for manufactured homes located in hurricane-prone regions needs to be developed.
Date
11/1994
11/1994
Author(s)
Richard Marshall
Richard Marshall
Page(s)
42
42
Keyword(s)
windstorm; hurricane; manufactured home; disaster; soil anchor; structural engineering; wind load; codes; standards
windstorm; hurricane; manufactured home; disaster; soil anchor; structural engineering; wind load; codes; standards