Wind Roof Load And Thermal Zones

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.

Wind roof load and thermal zones.

However you may not know that all manufactured homes are also built to thermal and roof load zone requirements. Homes designed and constructed to a higher roof load zone can be installed in a lower roof load zone a. 3 performance criteria for low sloped roof systems. 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 downward imposed load on the home is also known as the snow load. Has the lowest load. The north zone middle zone and the south zone are identified on the roof load zone map above. The new roof system or re roof system.

The appropriate roof load used in design is dependent on where the home will be initially installed. 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. In 3280 305 c it goes into further detail of what the requirements are for each zone. This information may be combined with the heating cooling certificate and insulation zone map required by 3280 510 and 3280 511.

This downward imposed load on the home is also known as the snow load. 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. Things get a bit more complicated for wind zones 2 and 3. Used to determine the best type of roof design for the.

There are three thermal zones in the u s and each hud code home is built to one of these zones based on where that home will be placed not where the home building facility is located. This zone accounts for approximately 80 of the roof surface represented in the interior zones of the roof. Wind zones were created by the department of housing and urban development hud in 1976. This translates to about 70mph in basic wind speeds.

And frequent membrane failures justify alternate. Homes designed and constructed to a higher thermal zone can be installed in a lower thermal zone a home designed to a thermal zone 3 can be installed in a thermal zone 1 or 2. This zone accounts for approximately 15 of the roof surface represented in the perimeter of the roof. The hud code stipulates at 3280 506 that the home shall be designed and constructed to conform to one of three thermal load zones.

Contract through a roof survey and or where repeated. Thermal and roof load zones. These zones are defined as follows. Higher loading than zone 1.

These different thermal zones determine levels of heat leakage or heat transmission in the home. Per asce 7 10 buildings are composed of 5 different zones depending on the wind loading they are subjected to. 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. Picture by manufactured housing institute.

The north zone middle zone and the south zone are identified on the roof load zone map above. The appropriate thermal zone value used in design is dependent on where the home will be initially installed.