The book The Design of Mine Structures was written by author Milo S Milo Smith Ketchum Here you can read free online of The Design of Mine Structures book, rate and share your impressions in comments. If you don't know what to write, just answer the question: Why is The Design of Mine Structures a good or bad book?
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315 together to form a tower, and the posts are made of two or more sec- tions. The caps are commonly bolted to the posts with drift bolts, square or round rods J to 1 in. diameter and 15 to 24 in. long, driven in holes bored somewhat smaller in diameter than the drift bolt. The posts are fastened to the sills by means of dowels, rods or bars similar to drift bolts, except that the holes bored to receive them must be larger and deeper, so that the post may be forced over the dowel which has bee...n driven in the sill. The bracing is fastened at the main joints by means of bolts and at secondary joints by means of spikes. The detail design of the standard framed timber trestle of the N. Y., N. H. & H. R. R. is shown in Fig. 219 f . Pile Trestles. — In a pile trestle the trestle bent which carries the stringers is made of four or more piles, which have been driven to a good refusal and sawed off at the proper height to receive the cap. The pile bent is cross-braced to give greater rigidity.
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