July 2007
by Ted Cushman
Where the codes once concentrated mostly on verifying that buildings could handle gravity loads, now coastal homes must also resolve the complicated load effects associated with high winds: uplift, shear (or "racking"), sliding, and overturning. Ted Cushman takes a closer look at one kind of loading - uplift - and reviews the current recommendations and resources.
First 100 Words:
Solving the Uplift Puzzle As building codes struggle to simplify prescriptive guidelines for wind-resistant structures, new measures for handling uplift emerge Ted Cushman Code Analysis Any coastal builder knows that tough wind-related codes along the Atlantic and Gulf seaboards have made structural design more complicated. Where the codes once concentrated mostly on verifying that buildings could handle gravity loads, now — ever since Hurricane Andrew — coastal homes must also resolve the complicated load effects associated with high winds: uplift, shear (or "racking"), sliding, and overturning (Figure 1, page 3). In wind-speed zones up to 100 mph, the prescriptive requirements
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