Wind Roof Load And Thermal Zones

Please note that certification labels are not replaced.

Wind roof load and thermal zones.

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. Wind zones were created by the department of housing and urban development hud in 1976. 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.

Ibts maintains data regarding the required certification labels and data plates for manufactured homes. Wind zone roof load zone and thermal zone. The roof pitch and roof load are always taken into account when designing the roof of your home. Has the highest load.

Where can i find my home roof load information. Homes designed and constructed to a higher thermal zone can be installed in a lower thermal zone a. 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. 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.

This information may be combined with the heating cooling certificate and insulation zone map required by 3280 510 and 3280 511. The north zone middle zone and the south zone are identified on the roof load zone map above. 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 verification letter provided suffices in most cases for missing certification labels or unknown manufacturer data for specific homes. This downward imposed load on the home is also known as the snow load. In order for a structure to be sound and secure the foundation roof and walls must be strong and wind resistant. Any areas between the wall corners that are not included within zone 5.

This translates to about 70mph in basic wind speeds. The wind zone map on the data plate shall also contain the statement. 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. 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.

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. 10 percent of least horizontal dimension or 0 4h whichever is smaller. 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. Thermal and roof load zones.