Bulletin No.12
Bulletin No.12
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In our eReader you can find the full English version of the book. Read Bulletin No.12 Online - link to read the book on full screen. Our eReader also allows you to upload and read Pdf, Txt, ePub and fb2 books. In the Mini eReder on the page below you can quickly view all pages of the book - Read Book Bulletin No.12
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Attention should be called, however, to the fact that even theoreticians would hardly desire to call for a post much less than 9 by 9 inches on a trestle for support- ing heavy locomotives, even for very short posts, while the longer the post gets the more nearly the theoretical size will correspond to current practice, which is to use practically 12 by 12 inch sticks throughout.
The comparatively low height of trestle assumed by the author of the paper for demonstrating the case does not reall...y represent a fair aver- age of the trestles in the country as far as the proportion of theoretical to actual sizes of posts is concerned. In other words, the grand aver- age of actual current work would show that the timber used for posts is closer to the theoretical requirements than in the example assumed for illustration.
The use of 12 by 12 inch stuff indiscriminately, while wasteful of timber in certain cases, is warranted by a great many practical features which absolutely control the situation and predominate far above theo- * The reviewer here and elsewhere has missed the main point made for the use of corhels as proposed, namely , that they as well as caps and sills be of oak or some similar hard wood, so that a smaller bearing area will yield twice the strength.
What to read after Bulletin No.12?
You can find similar books in the "Read Also" column, or choose other free books by United States. Forest Service to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
Attention should be called, however, to the fact that even theoreticians would hardly desire to call for a post much less than 9 by 9 inches on a trestle for support- ing heavy locomotives, even for very short posts, while the longer the post gets the more nearly the theoretical size will correspond to current practice, which is to use practically 12 by 12 inch sticks throughout.
The comparatively low height of trestle assumed by the author of the paper for demonstrating the case does not reall...y represent a fair aver- age of the trestles in the country as far as the proportion of theoretical to actual sizes of posts is concerned. In other words, the grand aver- age of actual current work would show that the timber used for posts is closer to the theoretical requirements than in the example assumed for illustration.
The use of 12 by 12 inch stuff indiscriminately, while wasteful of timber in certain cases, is warranted by a great many practical features which absolutely control the situation and predominate far above theo- * The reviewer here and elsewhere has missed the main point made for the use of corhels as proposed, namely , that they as well as caps and sills be of oak or some similar hard wood, so that a smaller bearing area will yield twice the strength.
What to read after Bulletin No.12?
You can find similar books in the "Read Also" column, or choose other free books by United States. Forest Service to read onlineMoreLess
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