Publication Date
1985
Location
Kyoto Japan
Description
Since the snow damage to the pasture fences has been found in the snowy area of Japan, it is necessary to establish a guideline of the useful and durable fences for grazing cattle. The structural and material problems of the pasture fences were investigated in the subdivided fence lines corresponding to the topographical slant on each fence line. These fences constructed in the highland of Tohoku District of Japan were composed of steel posts, steel props, 4-barbed wire and small plates to fix the wire to the fosts. The barbed wire had two types: #14 barbed wire (zinc 2 coating weight above 22 g/m2) with2 tensile strength 42 kgf/mm and #16 barbed wire (zinc coating weight above 200 g/m ) with tensile strength 125 kgf/mm . The rate of defects of posts, which were tipped, slanted, sunk into the ground groggy and bent, was 22.0% of all posts in spite of placing the props. In particular, the rate of that was increased as the topographical slant became steep. 3 ways of fixing the fallen wire to the posts were found. They were by using the plates, binding them with short wire and hanging them on the hooks of the posts. The way of repairing the slackned wire by using a cutting plier was 18.2% of all wire spans in 4-wire, particularly found frequently in the upper wire. From these surveys, the structural defects of the fences must be occured by the snow settling load. The rust was found on the surface of #14 barbed wire, coating a little zinc weight, except for the posts, props and #16 barbed wire. The broken wire was found largely in the second and third wire from the top wire rather than in the top or bottom wire, The percentage of broken #14 wire was double the average of that of #16 wire, and then about 75% of all broken wire occured within 20 cm distance from the post. From these observations, it is concluded that the breaking of the wire was caused not only by the heavier snow settling load and the smaller tensile strength of the wire but also by the worse way of repairing the fallen or slackened wire.
Citation
Hosokawa, Y, "Snow Damage to Pasture Fences in the Highland of Tohoku District of Japan" (1985). IGC Proceedings (1985-2023). 1.
(URL: https://uknowledge.uky.edu/igc/1985/ses16/1)
Included in
Agricultural Science Commons, Agronomy and Crop Sciences Commons, Plant Biology Commons, Plant Pathology Commons, Soil Science Commons, Weed Science Commons
Snow Damage to Pasture Fences in the Highland of Tohoku District of Japan
Kyoto Japan
Since the snow damage to the pasture fences has been found in the snowy area of Japan, it is necessary to establish a guideline of the useful and durable fences for grazing cattle. The structural and material problems of the pasture fences were investigated in the subdivided fence lines corresponding to the topographical slant on each fence line. These fences constructed in the highland of Tohoku District of Japan were composed of steel posts, steel props, 4-barbed wire and small plates to fix the wire to the fosts. The barbed wire had two types: #14 barbed wire (zinc 2 coating weight above 22 g/m2) with2 tensile strength 42 kgf/mm and #16 barbed wire (zinc coating weight above 200 g/m ) with tensile strength 125 kgf/mm . The rate of defects of posts, which were tipped, slanted, sunk into the ground groggy and bent, was 22.0% of all posts in spite of placing the props. In particular, the rate of that was increased as the topographical slant became steep. 3 ways of fixing the fallen wire to the posts were found. They were by using the plates, binding them with short wire and hanging them on the hooks of the posts. The way of repairing the slackned wire by using a cutting plier was 18.2% of all wire spans in 4-wire, particularly found frequently in the upper wire. From these surveys, the structural defects of the fences must be occured by the snow settling load. The rust was found on the surface of #14 barbed wire, coating a little zinc weight, except for the posts, props and #16 barbed wire. The broken wire was found largely in the second and third wire from the top wire rather than in the top or bottom wire, The percentage of broken #14 wire was double the average of that of #16 wire, and then about 75% of all broken wire occured within 20 cm distance from the post. From these observations, it is concluded that the breaking of the wire was caused not only by the heavier snow settling load and the smaller tensile strength of the wire but also by the worse way of repairing the fallen or slackened wire.
