Items related to The civil engineers pocket-book
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. 1906 Excerpt: ... (1, Fig 2. The parts gpen, f pen, Fig 1, are the Abutments of the arch; en, on, the facet; gp, gp, the backs; and p n, p n, the bases of the abuts. The bases are usually widened by feet, »tep», or of nets, d d, for distributing the wt of the bridge orer a greater area of foundation; thus diminishing the danger of set' tlement. The distance ( a in any arch-stone, is called its rf" The only arches in common use for bridges, are the circular, (often called segmental); and the elliptic. Art. 2. To find the depth of keystone for first class cnt-stone arches, whether circular or elliptic Find the rad c o, Fig 1, which will touch the arch at o, a, and e. Add together this rad, and half the span o e. Take the sq rt of the sum. Div this eq rt by 4. To the quot add fij of a ft. Or by formula, Inasmuch as the rules which we give for arches and abuts are entirely original and novel. It may tot to amiss lo state that they are not altogether empirical; bat are based upon accurate drawings Depth of key _ V'Rad + half span, ft9-, in /wt _ 4 + vu Joot" For second-class work, this depth may be increased about %th part; or for brick or fair rabble, about %rd. See table of Keystones. In large arcbes it is advisable to increase the depth of the archstones toward the springs; but when the span is as small as about 60 to 80 or 100 feet, this is not at all necessary if the stone is good; although the arch will be stronger if it is done. In practice this increase, even in the largest spans, does not exceed from to 3 the depth af the key; although theory would require much more in arches of great rise. Rem. To find the rad e o whether the arch be circular or elliptic. Square half the span e o. Square the whole rise i a. Add these squares together; div th« s...
"synopsis" may belong to another edition of this title.
- PublisherRareBooksClub.com
- Publication date2012
- ISBN 10 1235909379
- ISBN 13 9781235909375
- BindingPaperback
- Number of pages434
(No Available Copies)
Search Books: Create a WantIf you know the book but cannot find it on AbeBooks, we can automatically search for it on your behalf as new inventory is added. If it is added to AbeBooks by one of our member booksellers, we will notify you!
Create a Want