A Practical Treatise on Segmental and Elliptical Oblique or Skew Arches: Setting Forth the Principles and Details of Construction in Clear and Simple Terms (Classic Reprint)
The writer takes this opportunity of stating that he is under a deep obligation to the late Mr. Peter Nicholson, of Carlisle, for the first light he received in this practical stone-squaring art. His work on the Oblique Arch is perhaps for the student the most exhaustive to this day. It is not, therefore, the writer's intention in this humble attempt to travel over ground which has been much more ably investigated by the above able Engineer, and by Mr. Buck, Engineer to the London and North Western Railway Company, Crewe, and others whom he cannot pretend to equal; his object being to place in the hands of engineers, architects, builders, contractors, and especially working masons, in a tabulated form, the result of his calculations for 72 oblique bridges, designed to suit almost any situation, in spans ranging from 10 feet to 50 feet advancing by 5 feet, and from 35° to 70° advancing by also decimal multipliers for finding the corresponding dimensions for any span in the same degree of obliquity, thus saving much valuable time to all those engaged in practical constructions of this kind. Every theoretic and adjusted dimension necessary for enabling the draughts man to make his projection, and thus get his templates for drawing the plan, elevation, and section, or for building the bridge from certain specified dimensions, is given in the Tables of this Essay.
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