Showing results 401 - 450 of 483
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Typical hurricane strap to roof framing detail. Rafter or prefabricated roof truss.
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Typical installation of plywood openings protection for masonry (including CBS) building.
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Upper-floor tie to lower floor for two-story building. Floor tie anchor and nailed wall sheathing.
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Variation of maximum negative main wind force resisting system (MWFRS) pressures based on envelope procedures for low-rise buildings.
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Vertical (buoyant) flood force; buoyancy forces are drastically reduced for open foundations (piles or piers).
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Vinyl and aluminum soffit panels can blow away in high winds if not properly connected.
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Water depth versus wave height, and water depth versus breaking wave force against, a vertical wall.
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Wave scour at a single vertical foundation member (pile), with and without underlying scour-resistant stratum.
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When averaged over several years, more fatalities are caused by extreme heat than by any other weather-related hazard
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When flood waters reach living areas, the resulting mold and contamination can greatly increase clean up time and costs.
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When installing fasteners in roof sheathing, common mistakes include using the wrong size fasteners, missing the framing members, overdriving nails, and using too many or too few fasteners.
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When the EIFS siding on this house gave way in high winds, it revealed severe rotting of the sheathing beneath the windows due to long-term water leakage.
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When the lower break-away wall gave way in coastal flooding it peeled some of the EIFS siding off with it because there was no suitable break in the siding to allow it to detach cleanly.
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When the soffits blew away in 140 to 160 mph hurricane winds, wind-driven rain was allowed to enter the attic.
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With fiber cement siding, face nail rather than blind nail where the design wind speed is ≥100 mph.
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With fiber cement siding, place blind nails 3/4 to 1 inch from top edge and > 3/8 inch in from butt ends.
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Wood siding installation details to improve resistance to wind-driven rain at corners.
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Wrong - During high winds air entered the home elsewhere and pushed out the door which was inadequately anchored to the wall.
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Wrong - Framing a dormer using only toe nailing and end nailing is not acceptable in areas subjected to high winds, hurricanes, or earthquakes.
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Wrong - Glazing failed due to windborne debris during a hurricane.
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Wrong - In floodplains, the interior grade elevation should be equal to or higher than the exterior grade as shown on right.
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Wrong - Leaks in the roof sheathing can allow water to get in and wet the drywall, providing fertile ground for mold.
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Wrong - Mold can spread rapidly in flood damaged homes if materials aren't dried quickly.
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Wrong - Negative pressure from hurricane winds caused garage door to collapse inward.
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Wrong - Roof deck sheathing nails missed the trusses, potentially weakening the roof in high winds.
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Wrong - The pile foundation of this home nearly collapsed from coastal storm surges because the piles were not embedded deeply enough in the ground.
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Wrong - The window lying on the ground was protected by a shutter but the shutter was attached to the window frame, rather than directly to the wall framing.
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Wrong - This concrete roof was not adequately attached and reinforced and failed in high winds.
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Wrong - This roof failed in high winds due to lack of metal attachments to the framing.
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Wrong - Utility trim was substituted for the starter strip and the bottom lock was cut off this vinyl siding so the siding pulled loose under wind pressure.
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Wrong – Drain pipe has been cut and foundation penetration has not been properly sealed
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Wrong – For proper detailing of vinyl around windows and other obstacles, use utility trim, punch snaplocks into siding, and do not overlap directly beneath a window.
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Wrong – Garage door failure due to positive pressures from hurricane force winds.
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Wrong – If roof membrane is not fully adhered, it can flutter and fail due to negative pressure from wind above and positive pressure from air leakage through roof deck below
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Wrong – Known as a Hugel Swale, organic matter like sticks and leaves break down into compost and fill the swale full. This limits the swale’s ability to filter rainwater.