A Treatise on the Strength of Timber, Cast Iron, Malleable Iron, and Other Materials: With Rules for Application in Architecture, Construction of Suspension Bridges, Railways, Etc., with an Appendix on the Power of Locomotive Engines, and the Effect of Inclined Planes and GradientsJ. Weale, 1845 - 486 páginas |
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Otras ediciones - Ver todas
Términos y frases comunes
14 inch angle Area of section Area of top blocks bolts bottom rib Breaking weight brick broke cable cast iron centre computed Craigleith cubic foot cylinder deflection denote Depth of beam diameter dimensions direct cohesion Distance between supports Dockyard elasticity engine English oak equal feet 6 inches fibres fixed flanch force former formula fracture George Rennie given horizontal inch square last weight length lever malleable iron Mean Results ments metal middle nearly neutral axis pieces pitch pine plane Plate pressure props quantity rail railway ratio rectangular reduced resistance Riga fir screw specific gravity specimen square inch strength of materials stretched suspension bridges SWIFTSURE tabular value tension Thickness of vertical timber tion top rib transverse strength velocity vertical strength wall Weight Weight Weight wire wood Woolwich Dockyard
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Página i - Barlow on the Strength of Materials, enlarged. A TREATISE ON THE STRENGTH OF MATERIALS, with Rules for application in Architecture, the Construction of Suspension Bridges, Railways, &c. ; and an Appendix on the Power of Locomotive Engines, and the effect of Inclined Planes and Gradients. By PETER BARLOW, FRS A New Edition, revised by his Sons, PW BARLOW, FRS, and WH BARLOW, FRS...
Página 44 - ... 1. When the beam is fixed at one end, and loaded at the other, IW cos A = a d3 S, or — — .^ - = S, a constant quantity.
Página 175 - Multiply the sectional area of the bottom flange in inches by the depth of the beam in inches, and divide the product by the distance between the supports also in inches ; and 514 times the quotient equal the absolute strength of the beam in cwts.
Página 47 - for 1707 and 1708, from which the author concludes that the weight necessary to break a beam fixed at one end and loaded at the other, and that of a beam of double the length supported at each end and loaded in the middle, and another equal to the latter, but fixed at each end, were as the Nos. 4, 6, and 10, and the preceding deductions (Art. 28) give the values of those weights...
Página 198 - With the same data, required the thickness of the wall at bottom, supposing it in the form of a triangular wedge, as in the second example above. Example V. — To find the thickness of an upright rectangular wall necessary to support a body of water, the depth being 10 feet, and the wall 12 feet high, the specific gravity of water being 1000, and the best stock brick 2000. Example vi.
Página 3 - Muschenbroek has given a very minute detail of the experiments on the ash and the walnut, stating the weights which were required to tear asunder slips taken from the four sides of the tree, and on each side, in a regular progression from the centre to the circumference. The numbers of this table corresponding to these two timbers may therefore be conVOL.
Página 315 - We may consider, therefore, that the elastic power of good medium iron is equal to about ten tons per inch, and that this force varies from ten to eight »tons in indifferent and bad iron. It appears, also, (considering '000096 as representing in round number9 looooth,) tnat a bar of iron is extended one ten-thousandth part of its length...
Página 246 - Emerson was tried, which states, by cutting off a portion of an equilateral triangle (see page 114 of Emerson's Mechanics), the bar is stronger than before, that is, a part stronger .than the whole. The ends were loose, at 2 feet 8 inches apart, as before. The edge from which the part was intercepted was...
Página 251 - The levers being properly balanced, and the cable attached to a short arm rising above the axis, this draws the other arm downwards, and at a distance equal to twelve times the short arm, is a descending pin and ball : this acts in a cup placed on the upper part of the arm of the second lever, and this again acts on a third.
Página 250 - This proving machine was constructed by Messrs. Bramah, of Pimlico, and is doubtless one of the most perfect of the kind which has been executed. It consists of two cast-iron sides, cast in lengths of 9£ feet each, with proper flanches for abutting against each other, and for fixing the whole to sleepers resting on a secure stone foundation. The whole length of the frame is 104£ feet, equal to £th the length of a cable for a first-rate...