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- W650057797 abstract "Snow fences are erected to improve conditions as regards wind and snow accumulation across and on the windward side of the road. Snow fences are most effective where the road passes through snow drift areas and areas with very poor visibility. Snow fences are divided into two classes - collecting fences and leading fences, collecting fences being most common. Collecting fences should be designed with 50 percent inter-spaces and a clearance between the bottom of the fence and the ground which is 1/5 of the total height h of the fence. In highlands, fences must be made of materials - wood or metal - that can withstand snow creepage forces. Three types of fences are described, 2 of wood and 1 of aluminium. Although the aluminium fence has a 20 percent better snow collecting capacity, the use of wooden fences is still recommended because hitherto aluminium fences have not been strong enough to withstand snow creepage forces. Collecting fences are normally erected perpendicular to the drift-forming wind and should be erected in erosion zones where the wind current is more or less parallel. The distance from fence to road should normally be about 15 times the height of the fence. In regions with excessive snow drifts and where fences can be erected only at a considerable distance from the road, it is better to have fences in two or more rows, rather than fences higher than 4,5 M. Leading fences are erected at an angle of 25-30 degrees to the prevailing wind. To be effective, such fences must be more compact - 60-70 percent enclosed and a clearance of 0.1 h from the ground. Moreover they should have a large wind surface and be from 3 to 4.5 metres high. The distance between fence and road should be as small as possible, without other wind directions tending to form drifts on the road. Leading fences are used when the wind is almost parallel with the road and snow drifts from the fence can be deposited away from the road. /TRRL/" @default.
- W650057797 created "2016-06-24" @default.
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- W650057797 date "1975-12-01" @default.
- W650057797 modified "2023-09-24" @default.
- W650057797 title "DESIGN AND LOCATION OF SNOW FENCES" @default.
- W650057797 hasPublicationYear "1975" @default.
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