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Hurricane Straps

Video

Video showing how to create a continuous load path using hurricane straps and anchor bolts to comply with FLASH Strong Home practices.

FORTIFIED Roof System - Hurricane

Video

Animated video showing how to properly apply roof decks in hurricane regions according to IBHS practices.

The front porch on this home survived a hurricane

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FORTIFIED Animation: Hurricane & HWH - Gables

Video

Video showing how to install gables properly to ensure a secure roof frame per IBHS FORTIFIED Home standards.

Hurricane Retrofit Guide - Gable End Overhangs

Reference

A document aimed at reducing the vulnerability of a gable end roof to wind damage in a hurricane.

FORTIFIED Animation: Hurricane - Continuous Load Path

Video

Video showing key connection joints for a properly installed continuous load path per IBHS FORTIFIED Home specifications.

Bracing of Roofs for Hurricane, High Wind, and Seismic Resistance

Guide

Guide describing ways to strengthen roof assemblies for resistance to hurricanes, high winds, and earthquakes.

Right - This concrete roof is properly attached and reinforced to withstand hurricane winds.

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Wall Bracing for Hurricane, High Wind, and Seismic Resistance

Guide

Guide describing how to construct the walls of a home with bracing to resist high wind and earthquake loads.

Hurricanes, Earthquakes & Tornados - Design of Wood-frame Structures for Extreme Forces

Video

Video presentation describing wood framing design to withstand extreme forces from severe weather.

Typical hurricane strap to roof framing detail. Rafter or prefabricated roof truss.

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Example A of a gable truss and gable end wall bracing for a home in a hurricane region

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Example B of a gable truss and gable end wall bracing for a home in a hurricane region

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Right - The wall framing is connected to roof framing with metal ties for hurricane-resistant construction.

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End wall failure under hurricane force winds due to inadequate bracing of the gable end wall.

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Right - Correct angle for installing an engineered structural screw to secure a rafter to a wall for hurricane resistance.

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Bolted metal hurricane strapping ties the roofing to the framing and the framing to the foundation walls for resistance to high winds.

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Right - Engineered structural screws are installed to secure a stud to a top and bottom plate for increased hurricane or seismic resistance.

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Mitigation Assessment Team Report: Hurricane Michael in Florida: Building Performance Observations Recommendations and Technical Guidance, FEMA P-2077

Reference

FEMA Mitigation Assessment Team Report describing damages from Hurricane Michael in Florida in Oct. 2018 and recommendations for future hurricane preparedness.

Hurricane Katrina in the Gulf Coast: Mitigation Assessment Team Report, Building Performance Observations Recommendations and Technical Guidance, FEMA 549

Reference

Guide discussing observations, recommendations, and technical guidance as a result of Hurricane Katrina

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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In areas prone to high winds and hurricanes, double vertical “jack trim” and horizontal “header” and “sill” studs are recommended on all sides of window and door openings.

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Wrong - Toe nails in roof truss are set too low in framing bracket and hurricane strap is set too high so lower nails don't hit lower 2x6 of top plate.

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Wrong – This gable end wall failed because connectors were missing at points of support (blue circles) and the outlookers were not connected to the end truss (yellow circle)

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Hurricane Straps

FORTIFIED Roof System - Hurricane

The front porch on this home survived a hurricane

FORTIFIED Animation: Hurricane & HWH - Gables

Hurricane Retrofit Guide - Gable End Overhangs

FORTIFIED Animation: Hurricane - Continuous Load Path

Bracing of Roofs for Hurricane, High Wind, and Seismic Resistance

Right - This concrete roof is properly attached and reinforced to withstand hurricane winds.

Wall Bracing for Hurricane, High Wind, and Seismic Resistance

Hurricanes, Earthquakes & Tornados - Design of Wood-frame Structures for Extreme Forces

Typical hurricane strap to roof framing detail. Rafter or prefabricated roof truss.

Example A of a gable truss and gable end wall bracing for a home in a hurricane region

Example B of a gable truss and gable end wall bracing for a home in a hurricane region

Right - The wall framing is connected to roof framing with metal ties for hurricane-resistant construction.

End wall failure under hurricane force winds due to inadequate bracing of the gable end wall.

Right - Correct angle for installing an engineered structural screw to secure a rafter to a wall for hurricane resistance.

Bolted metal hurricane strapping ties the roofing to the framing and the framing to the foundation walls for resistance to high winds.

Right - Engineered structural screws are installed to secure a stud to a top and bottom plate for increased hurricane or seismic resistance.

Mitigation Assessment Team Report: Hurricane Michael in Florida: Building Performance Observations Recommendations and Technical Guidance, FEMA P-2077

Hurricane Katrina in the Gulf Coast: Mitigation Assessment Team Report, Building Performance Observations Recommendations and Technical Guidance, FEMA 549

Wrong - Framing a dormer using only toe nailing and end nailing is not acceptable in areas subjected to high winds, hurricanes, or earthquakes.

In areas prone to high winds and hurricanes, double vertical “jack trim” and horizontal “header” and “sill” studs are recommended on all sides of window and door openings.

Wrong - Toe nails in roof truss are set too low in framing bracket and hurricane strap is set too high so lower nails don't hit lower 2x6 of top plate.

Wrong – This gable end wall failed because connectors were missing at points of support (blue circles) and the outlookers were not connected to the end truss (yellow circle)

Recommended hip roof framing

Get a Storm Ready Roof

Typical installation of plywood openings protection for wood-frame building.

Outrigger faming for a gable end roof overhang

Typical roof truss top chord bracing

Detail A - Typical truss web bracing