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Chapter 5:Hazard Analysis—Tropical Cyclones <br /> Table 5-5. Wood frame,double wall,residential construction statistics for Hawaii County <br /> Hawaii County(Double Wall Construction) <br /> Effective Date Year of UBC Hurricane Tie Requirement Number of Residences <br /> February 8,1962 1961 None 648 <br /> April 17,1968 1967 None 194 <br /> August 8,1972 1970 None 1416 41%Without Roof <br /> Strap <br /> February 25,1975 1973 None 1065 <br /> December 11,1978 1976 None 2600 <br /> January 19,1985 1982 None 5010 <br /> December,1993 1991 UBC Appendix Load Path 12126 59%With Roof Strap <br /> July,1999 1994 UBC Appendix Load Path 3759 <br /> Total= 26818 <br /> Table 5-6. Wood frame,single wall,residential construction statistics for Hawaii County <br /> Hawaii County (Single Wall Construction) <br /> Effective Date Year of UBC Hurricane Tie Requirement Number of Residences <br /> February 8, 1962 1961 None 8723 <br /> April 17, 1968 1967 None 2109 <br /> August 8, 1972 1970 None 2471 91%Without Roof <br /> Strap <br /> February 25,1975 1973 None 931 <br /> December 11, 1978 1976 None 1088 <br /> January 19, 1985 1982 None 1378 <br /> December, 1993 1991 UBC Appendix Load Path 1271 <br /> 9%With Roof Strap <br /> July, 1999 1994 UBC Appendix Load Path 293 <br /> Total—1 18264 <br /> 5.5.1.1.1 Windborne Debris Protection <br /> Hawaii is considered a windborne debris region per the ASCE 7 standard; this requires <br /> additional measures for basic windborne debris protection, and also special cases where even <br /> higher strength of enhanced glazing protection (such as health care and large assisted living <br /> facilities,public assembly, and essential and emergency response facilities) is further defined <br /> in the building code. In previous versions of ASCE 7 it was permitted, if the basic windborne <br /> debris protection was not provided, to design the building for the additional internal wind <br /> pressure resulting from window breakage. That internal pressure can raise the forces on <br /> structural and cladding components by as much as 100%higher (double). The current ASCE <br /> 7-05 does not allow for unprotected opening of buildings located within the windborne debris <br /> region, it simply states: <br /> 5-14 Hawaii County Multi-Hazard Mitigation Plan <br />