Carpentry Made Easy: Or, The Science and Art of Framing, on a New and Improved System
J. Challen & Sons, 1857 - Bridge building - 134 pages
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12 feet 12 inches added altitude base beam blade boards bolts braces bridge building called centre chord common rafter constructed corner Cross cross timbers described designed diagonal difference distance divide draw edge equal exhibits extend feet long figure floor foot four frame girder give given half hence hip rafters inch Rise intersection iron jack rafters joint joists length less lower lower chord lower end bevel manner mark measured middle mode mortices obtained octagon opposite parallel perpendicular pieces pitch Plate practical principal Prop proper proportion Proposition purlin post quantities regular represented rest right angles rods roof rules short side bevel sills similar span square root straight line studding sufficiently supported Table thickness third timber tongue triangle upper end bevel wall weight wide width
Page 27 - If two triangles have two angles and the included side of the one, equal to two angles and the included side of the other, each to each, the two triangles will be equal.
Page 14 - A right-angled triangle (Fig. 24) is any triangle having one right angle. The side opposite the right angle is called the hypotenuse.
Page 30 - Conversely, if two angles of a triangle are equal, the sides opposite them are also equal, and the triangle is isosceles.
Page 17 - A Circle is a plane figure bounded by a curved line every point of which is equally distant from a point within called the center.
Page 28 - If two triangles have the three sides of the one equal to the three sides of the other, each to each, the triangles are congruent.
Page 30 - The straight line which bisects the vertical angle of an isosceles triangle is perpendicular to the base.
Page 17 - A diameter of a circle is a straight line drawn through the centre, and terminated both ways by the circumference.
Page 17 - A circle is a plane figure contained by one line, which is called the circumference, and is such, that all straight lines drawn from a certain point within the figure to the circumference are equal to one another : 16. And this point is called the centre of the circle.
Page 33 - If two triangles have two sides and the included angle of the one, equal to two sides and the included angle of the other, each to each, the two triangles will be equal in all their parts." Axiom 1. "Things which are equal to the same thing, are equal to each other.
Page 18 - The circumference of every circle is supposed to be divided into 360 equal parts, called degrees ; each degree into 60 equal parts, called minutes ; and each minute into 60 equal parts, called seconds.