Theory of Transverse Strains and Its Application in the Construction of Buildings; Including a Full Discussion of the Theory and Construction of Floor Beams, Girders, Headers, Carriage Beams, Bridging, Rolled-Iron Beams and Roof Trusses

Theory of Transverse Strains and Its Application in the Construction of Buildings; Including a Full Discussion of the Theory and Construction of Floor Beams, Girders, Headers, Carriage Beams, Bridging, Rolled-Iron Beams and Roof Trusses

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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. 1882 edition. Excerpt: ... concentrated loads upon the carriage beam are equal, or a! = b' and, in formula (170.), a' V ti 11 d (A-) = jri-s) = o and the formula itself becomes = r(iW') (182.) in which b' represents the combined effect of the two loads, as acting at the location of either of them. This effect is shown (Art. 153) to be, mn ms m b = W-7-+V-J-=-r-(ttn+ys) In the case under consideration, W = V and m = s, and therefore - = IV-(-+ m) = W-j-= Wm Now, W represents the weight concentrated in one end of one 'of the headers. The load on a header is fgm, and the load at one end of the header is fgn; therefore and formula 182.) becomes b = riXcht+gm) By formula 173.) v i, a'b', %cdf and since in this case a'--b' = o which is a precise rule for carriage beams carrying two headers, equidistant from the centre, with two sets of tail beams, and with a given rate of deflection. (See Arts. 393. 395 and 402.) 416.--Example.--Under this rule, what should be the breadth of a Georgia pine carriage beam of average quality. 20 feet long and 12 inches deep, to carry two headers each CARRIAGE BEAMS WITH TWO HEADERS. 289 12 feet long; the headers so placed as to leave an opening 6 feet wide in the middle of the width of the floor? The floor beams are set 16 inches from centres, and are to carry 200 pounds per foot superficial, with a deflection of 0-04 of an inch per foot lineal. u I--d' 20--6 Here /=2o, m = = = 7; g 12, d= 12, c = i$, ./"= 5900, /=2CO and /-=0-04; and by formula 183.), 200 x 20 r., .... ., b = 5 rtrV Ii2o) + (i2X7J) = 7.402 5900 x 12 x0-04lU6 5 'v / n / t or the breadth should be 7! inches. 417.--Carriage Beams with Two Headers, Equidistant from Centre, and Two Sets of Tail Beams, for Dwellings and for First-class Stores--Precise Bules.--If, in...show more

Product details

  • Paperback | 112 pages
  • 189 x 246 x 6mm | 213g
  • Rarebooksclub.com
  • Miami Fl, United States
  • English
  • black & white illustrations
  • 1236510615
  • 9781236510617