Trusses And Arches Analyzed And Discussed By Graphical Methods (volume 2) by Charles Ezra GreeneTrusses And Arches Analyzed And Discussed By Graphical Methods (volume 2) by Charles Ezra Greene

Trusses And Arches Analyzed And Discussed By Graphical Methods (volume 2)

byCharles Ezra Greene

Paperback | February 5, 2012

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This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1881. Excerpt: ... between the upper and lower chords, but more particularly to form, with the struts of the lateral bracing at top and bottom, stiff frames to resist lateral distortion. Gusset-pieces also may be riveted in the interior angles between these verticals and the lateral struts. 57. Post Truss.--The type of truss illustrated by Figs. 26, 28, and 29, takes its name from its inventor: it is probably the outgrowth of an endeavor to study economy of material by inclining the struts and ties at the most economical angle. While the length of a tie has no influence on the cross-section necessary to carry safely a certain stress, the dimensions of a strut depend upon its length; and hence, the shorter it can be made, the less its cross-section will be. Mr. S. S. Post proposed, that, calling the distance between loaded points one panel, a tie should extend across one panel and a half, and a strut across one-half of a panel, the height of the truss being one panel and a half; so that the ties should slope at an angle of 45, and the struts at an angle of 18 26', with the vertical. As a tie and a strut together extend over two panels, the web members must form a double system. The counter-ties will also slope at 45, owing to the peculiar arrangement of partrs. The joints in one chord occur midway between those of the other; and it will be noticed that each counter connects the joint of one system with a joint of the other system, thus introducing an element of indetermination into the attempt to find the web-stresses. While this form of truss has been, so far as our knowledge goes, used exclusively as an over-grade or through truss, there appears to be no reason why it may not be employed in a design for a deck-bridge; and, as the method of finding the chord-stresses differ...
Title:Trusses And Arches Analyzed And Discussed By Graphical Methods (volume 2)Format:PaperbackDimensions:52 pages, 9.69 × 7.44 × 0.11 inPublished:February 5, 2012Publisher:General Books LLCLanguage:English

The following ISBNs are associated with this title:

ISBN - 10:021765083X

ISBN - 13:9780217650830

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