Roof Load Zone Map

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Roof load zone map.

Soil classification and bearing table. Flat roof snow loads of 30 psf 1 44 kn m 2 or less and roof live loads of 30 psf 1 44 kn m 2 or less need not be combined with seismic loads. 10 percent of least horizontal dimension or 0 4h whichever is smaller. Frost depth map minnesota rules 1303 1600.

Where flat roof snow loads exceed 30 psf 1 44 kn m 2 20 percent shall be combined with seismic loads. For example states like alaska and maine have some of the highest snow load requirements. 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. I believe the current hud roof load map was established in 1974 but the map was based on the existing cfr code of federal regulations.

Zone 2 consists of the county of worcester. Has the highest load. To request a copy send a check for 22 50 includes postage payable to department of civil engineering university of idaho p o. Crane hook loads need not be combined with roof live load or with more than three fourths of the snow load or one half of the wind load.

Where flat roof snow loads exceed 30 psf 1 44 kn m 2 20. Square footing sizing table. The locations of wind load zones are shown in the figures 1611 1a 1611 1b 1611 1c maps. 2 the basic roof snow load factor c b shall be 0 8 except that for large roofs it shall be a 1 0 30 l c 2 for roofs with c w 1 0 and l c greater than or equal to 70 m or b 1 3 140 l c 2 for roofs with c w 0 75 or 0 5 and l c greater than or equal to 200 m where l c characteristic length of the upper or lower roof defined as 2w w l in metres.

Snow load map ground load and roof load map per minnesota rules 1303 1700. This zone accounts for about 5 of the roof surface represented the corners of the roof. The hud roof load zone map was produced because of this confusion but did not change the map that cfr already used. Used for roof overhang area along the perimeter of zone 3.

Egress windows for manufactured homes jan. Zone 1 consists of the counties of berkshire franklin hampshire and hampden. Roof load zone map each manufactured home must be designed according to the federal manufactured home construction and safety standards at 24 cfr 3280 commonly called the hud code. Any areas between the wall corners that are not included within zone 5.

780 cmr 1611 0 wind load 1611 1 wind load zones. Crane hook loads need not be combined with roof live load or with more than three fourths of the snow load or one half of the wind load. Roof load zones vary depending on snow levels in different parts of the u s. Other states like colorado parts of michigan and parts of wisconsin have a higher snow load than other parts of the u s.

I guess the cfr regulations were difficult to discern because of many revisions and ammendments. Flat roof snow loads of 30 psf 1 44 kn m 2 or less need not be combined with seismic loads. Sheikh taheri published by the ui department of civil engineering 1986.