This downward imposed load on the home is also known as the snow load.
Wind roof load and thermal zones.
Where can i find my home roof load information.
Wind zones were created by the department of housing and urban development hud in 1976.
Hud code requires the data plate in a manufactured home to display the wind and roof load zones or whether the home has been designed to higher snow and wind loads than required.
In order for a structure to be sound and secure the foundation roof and walls must be strong and wind resistant.
Ibts maintains data regarding the required certification labels and data plates for manufactured homes.
When building a structure it is important to calculate wind load to ensure that the structure can withstand high winds especially if the building is located in an area known for inclement weather.
Any areas between the wall corners that are not included within zone 5.
The appropriate thermal zone value used in design is dependent on where the home will be initially installed.
The north zone design live load equates to 40 pounds per square foot the middle zone equates to 30 pounds per square foot and the south zone equates to 20 pounds per square foot.
The verification letter provided suffices in most cases for missing certification labels or unknown manufacturer data for specific homes.
The north zone middle zone and the south zone are identified on the roof load zone map above.
Thermal and roof load zones.
The hud code stipulates at 3280 305 c 3 that the home shall be designed and constructed to conform to one of three roof load zones.
The hud code stipulates at 3280 506 that the home shall be designed and constructed to conform to one of three thermal load zones.
10 percent of least horizontal dimension or 0 4h whichever is smaller.
This zone accounts for about 5 of the roof surface represented the corners of the roof.
This translates to about 70mph in basic wind speeds.
Please note that certification labels are not replaced.
Has the highest load.
Used for roof overhang area along the perimeter of zone 3.
The appropriate roof load used in design is dependent on where the home will be initially installed.
The roof pitch and roof load are always taken into account when designing the roof of your home.
Homes built for zone 1 should be able to resist horizontal wind loads of no less than 15 psf and upward roof lifting loads of no less than 9 psf.
The wind zone your home will be located in determines how the home is built and just as importantly how the home is anchored to the ground or foundation.
Homes designed and constructed to a higher thermal zone can be installed in a lower thermal zone a.
Homes designed and constructed to a higher roof load zone can be installed in a lower roof load zone a.
Things get a bit more complicated for wind zones 2 and 3.
F reference to the roof load zone and wind load zone for which the home is designed and duplicates of the maps as set forth in 3280 305 c.
