Loads in Structures; Properties of Sections; Materials of Structural

Excerpt from Loads in Structures; Properties of Sections; Materials of Structural Engineering; Beams and Girders; Columns and Struts; Details of Construction; Graphical Analysis of Stresses

Two of the volumes composing this library, of which this is the first, are devoted to structural engineering. It has been our aim to present the fundamental laws that serve as a basis for structural engineering, in as clear and concise a manner as possible, thus assuring a thorough under standing of the succeeding and more difficult papers in which these laws are applied. The present volume deals mainly with the laws of stresses, that is, with the methods for ascertaining their magnitude, direction, and points of application, both the analytical and the graphical methods being used. Other papers, perhaps of equal importance, are those which treat of the means for distributing the stresses; they consider not only the material most suitable for the purpose. But also the most efficient and economical shape in which to arrange the material. It may be added that of the subjects here mentioned, some are perhaps treated in a more thorough and simple manner than is to be found in any other treatise; we refer in particular to the papers entitled Beams and Girders and Columns and Struts.

The method of numbering the pages, cuts, articles, etc. Is such that each subject or part, when the subject is divided into two or more parts, is complete in itself; hence, in order to make the index intelligible, it was necessary to give each subject or part a number. This number is placed at the top of each page, on the headline, opposite the page number; and to distinguish it from the page number it is preceded by the printer's section mark Consequently, a reference such as 16, page 26, will be readily found by looking along the inside edges of the headlines until 16 is found, and then through 16 until page 26 is found.

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