The Principles of Structural Design, الجزء 1

الغلاف الأمامي
W. & J. Mackay & Company [for] the Royal Engineers Institute, 1897

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الصفحة 17 - If any number of forces acting at a point can be represented in magnitude and direction by the sides of a POLYGON taken in order, they are in equilibrium.
الصفحة 52 - Strips cut lengthwise or crosswise, to have an ultimate tensile strength of not less than 26 and not exceeding 30 tons per square inch of section, with an elongation of 20 per cent, in a length of 8 inches.
الصفحة 228 - ... to cover and protect a building from the effects of the weather, and also to bind and give strength and firmness to the fabric. To effect these purposes it should neither be too heavy nor too light, but of a just proportion in all its parts to the magnitude of the building. Mr. Ware observes, that in practice roofs are generally made too heavy; and that he will do a most acceptable service to his profession, who shall show how to retrench and execute the same roof with the smallest quantity of...
الصفحة 52 - ... 82° Fahrenheit, must stand bending in a press to a curve of which the inner radius is one and a half times the thickness of the steel tested. The strips are all to be cut in a planing machine, and to have the sharp edges taken off.
الصفحة 334 - The intensity of illumination which is received obliquely is proportional to the cosine of the angle which the luminous rays make tuith the normal to the illuminated surface.
الصفحة 185 - Each part of the joint should be proportioned to the stress it has to bear. 3. Abutting surfaces in compression should be placed as nearly as possible perpendicular to the stress.
الصفحة 104 - ... of the elementary areas, into which the surface may be conceived to be divided, by the square of its distance from the axis. The...
الصفحة 10 - Force is an action between two bodies, either causing or tending to cause change in their relative rest or motion.
الصفحة 174 - ... independently, and to compute their separate effects, add the resulting stresses together, and to dimension the member accordingly. In the following analysis they are treated as acting simultaneously and the true cross-bending stresses found.

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