Appleton's dictionary of machines, mechanics, engine-work, and engineering (1861)
Appleton, firm, publishers, New York. (1852, D. Appleton & Co.) · New York : D. Appleton · leaf 41
d in pairs, four feet apart; between these, the posts which support the sides of the trunk arelet in with dovetailed tenons, secured by bolts. The outside posts which support the sidewalk and tow-path, incline outwards, and are connected with the beams in a similar manner. Each trunk post is heldby… … and 16x6 inches; the space between two adjoining is 4 inches. It will be observed that all parts ofthe framing are double with the exception of the posts, so as to admit the suspension rods. Each pairof beams is supported on each side of the trunk by a double suspension rod of l^th inch round…
Mechanical engineering
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