The Principles of Structural Design, Μέρος 1W. & J. Mackay & Company [for] the Royal Engineers Institute, 1897 |
Άλλες εκδόσεις - Προβολή όλων
Συχνά εμφανιζόμενοι όροι και φράσεις
angle applied ascertain beam bear bending bolt breadth brick brickwork bridge calculated cantilever cast iron cement Chapter column common rafters compression compression members consider cross section crushing curve deflection depth diameter direct stresses distance draw elasticity equal equation example factor of safety feet fibres fixed flange force formula girder gives graphic Hence horizontal inch-tons investigation joint length load masonry material maximum modulus of elasticity Moment of Inertia mortar neutral axis number of rivets ordinary parabola parallel pipe plate practical principles purlins ratio reaction rectangle red fir represent resistance roof safe scantling shearing stress shown in Fig side span square foot square inch steel stress diagram structure strut supported Table tensile strength tensile stress tension thickness tie beam timber tons per square triangle truss usually various vertical W₁ wall weight width wind pressure wrought iron
Δημοφιλή αποσπάσματα
Σελίδα 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.
Σελίδα 56 - 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.
Σελίδα 231 - ... 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...
Σελίδα 56 - ... 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.
Σελίδα iii - In the first place it will be universally admitted, that as far as is possible, mathematical intricacy ought to be avoided. In the original discovery of a proposition of practical utility, by deduction from general principles and from experimental data, a complex algebraical investigation is often not merely useful, but indispensable; but in expounding such a proposition as a part of practical science, and applying it to practical purposes, simplicity is of the first importance : — and, in fact,...
Σελίδα 344 - 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.
Σελίδα 191 - 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.
Σελίδα 108 - ... of the elementary areas, into which the surface may be conceived to be divided, by the square of its distance from the axis. The...
Σελίδα 10 - Force is an action between two bodies, either causing or tending to cause change in their relative rest or motion.
Σελίδα 180 - ... 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.