ما يقوله الناس - كتابة مراجعة
لم نعثر على أي مراجعات في الأماكن المعتادة.
طبعات أخرى - عرض جميع المقتطفات
angle applied ascertain beam bear bending breadth bricks brickwork bridge calculated cantilever cast iron cement centre Chapter column common rafters compression compression members consider cross section crushing curve deflection depth diameter direct stresses distance draw elastic limit elasticity equal equation Example factor of safety feet fibres fixed flange force formula girder gives graphic Hence horizontal inch-tons investigation joint length load material maximum Moment of Inertia mortar neutral axis number of rivets ordinary parabola parallel pipe plate practical principal purlins ratio reaction rectangle red fir represent resistance roof safe scantling shearing stress shown in Fig side span square foot square inch steel strength stress diagram structure strut supported Table tensile tensile strength tensile stress tension thickness tie beam timber tons per square triangle truss usually vertical wall weight width wind pressure wrought iron
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 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.