A Manual of Carpentry and JoineryMacmillan and Company, limited, 1905 - 500 páginas |
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Términos y frases comunes
architraves arranged bead beam bevels binders bolection bolts bottom rail brace bridle joint building centre circle circular circular saw common rafters construction cubic curved cwts door frame dovetail joint equal EXAMPLE feet fixed floor boards foot forces girders grooved gutter hinges hip rafter Horizontal Section inches inclined intersection iron jack plane joiner joists King-post length load lower ends machine method mitred Mitred Joint mortise and tenon moulding muntins nailed necessary obtained outer panelled parallel pieces pitch pine plaster Prel principal rafter projections pulleys purlins Queen-post radius rebated right angles risers roof truss sash scale scarfed joint screws shape shores shown in Fig shows side sill sketch square stairs straight line stress string struts styles tenon joint thickness timber tongued and grooved treads triangle truss upper end vertical plane Vertical Section wall wedges weight width window wood wooden
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Página 311 - If three forces acting at a point are in equilibrium, they can be represented in magnitude and direction by the three sides of a triangle taken in order.
Página 308 - ... forces will be represented in magnitude and direction by that diagonal of the parallelogram which passes through this point.
Página 158 - ... 2. To place each abutting surface in a joint as nearly as possible perpendicular to the pressure which it has to transmit. 3. To proportion the area of each surface to the pressure which it has to bear, so that the timber may be safe against injury under the heaviest load which occurs in practice, and to form and fit every pair of such surfaces accurately, in order to distribute the stress uniformly.
Página 96 - Prove that parallelograms on the same base and between the same parallels are equal in area.
Página 88 - In a right-angled triangle the square on the side subtending the right angle is equal to the sum of the squares on the sides containing the right angle.
Página 26 - A diameter of a circle is a straight line drawn through the centre, and terminated both ways by the circumference.
Página 26 - A circle is a plane figure bounded by a line, every point of which is equally distant from a point within, called the center.
Página 345 - A man sitting upon a board suspended from a single moveable pulley pulls downwards at one end of a rope which passes under the moveable pulley and over a pulley fixed to a beam overhead, the other end of the rope being fixed to the same beam. What is the smallest proportion of his whole weight with which the man must pull in order to raise himself?
Página 35 - Other polygons include the quadrilateral (4 sides), pentagon (5 sides ) , hexagon ( 6 sides ) , heptagon ( 7 sides ) , octagon ( 8 sides ) , nonagon ( 9 sides ) , decagon ( 10 sides ), and dodecagon ( 12 sides).
Página 337 - ... and yellow pine, 3. Another important consideration is the ratio which the breaking load of a beam bears to the " safe " load. This ratio is called the factor of safety, and its value depends upon whether the load is a live — a constantly moving — load, or a dead (ie, a stationary) load. The factor of safety for a dead load is usually taken at 5, which means that the safe load upon a beam must not exceed one-fifth of the breaking load ; the factor of safety for a live load is often taken...