Hurricane Hugo, Puerto Rico, the Virgin Islands, and Charleston, South Carolina, September 17-22, 1989 (1994) / Chapter Skim
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Wind Damage to Buildings and Structures
Wind Damage to Buildings and Structures
Pages 247-257
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From page 247... ...
The surveys also indicated that the strongest winds and highest storm surge occurred in the Bull Bay area, approximately 25 miles northeast of Charleston. Wind damage occurred as far south as Edisto Beach and as far north as North Myrtle Beach.
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From page 248... ...
The falling trees caused extensive damage to residences as far inland as Charlotte, North Carolina Near the coast, the trees served as a windshield, preventing the wind from damaging many of the residences, but in many of these areas, residences were damaged by broken trees or branches. NONENGINEERED BUILDINGS AND STRUCTURES In residential areas where the most intense winds occurred and the extensive damage was observed, one could find houses that received little or no damage standing beside the remains of a house totally destroyed by the storm.
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From page 249... ...
The survey team identified one unique structural failure to a home in the Bull Bay area. It resulted from a horizontal wind force causing the residence to rotate the floor joists on the supporting beams, dropping the superstructure dropping approximately 11 I/2 inches until it came to rest on flat floor joists.
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From page 250... ...
Typical roof coverings on these buildings were either galvanized metal, single-ply membranes, or built-up roofing (Figure 13-3~. The failures of both types of roofing resulted from inadequate ballast or attachments of the roofing to resist the design wind loads.
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From page 251... ...
And Damage to Buildings and Structures FIGURE 13-2 Typical damage to roofs. FIGURE 13-3 Typical damage to metal roof coverings.
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From page 252... ...
Cladding failures were noted as far north as North M"vrtle Beach, where the recorded winds were well below design wind velocities. Roofing failures, on the ocher hand, resulted ~ extensive additional damage, as water was able to penetrate the interior building, causing extensive damage to Snishes and contents.
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From page 253... ...
This survey indicated that the earliest building code was adopted in 1929, when the city of Charleston developed and began enforcing its own building code. The latest local code adopted was 1985, when the town of Pauleys Island was incorporated and adopted the 1985 edition of the Standard Building Code and the 1983 edition of the One- and Two-Family Dwelling Code.
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From page 254... ...
The 1983 and 1986 edition of the One- and Two-Family Dwelling Code, based on the wind probability map in Appendix A of the code, recommends that buildings less than 30 ft in height located along the South Carolina coast be designed to resist wind pressure of 25 psf. This code requires special design consideration for wood frame walls and related connections only when the wind pressure exceeds 30 psf.
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From page 255... ...
Near-hurricane-force winds extended inland to Charlotte, North Carolina, causing extensive tree and minor building damage for distances up to 180 my from the South Carolina coast. Hugo had a much faster forward movement than most storms, and it is believed that this accounts for the higher than normal inland wind speeds.
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From page 256... ...
bBased on approximate conversion methods that adjust sustained wind speeds to fastest-mile wind speeds at 10 m (33 fit) above the ground.
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From page 257... ...
A viable testing standard and evaluation procedure needs to be developed for accessing the wind resistance of asphalt shingle roof coverings. Marginally Engineered Buildings and Structures I
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