The American House-carpenter: A Treatise on the Art of Building, and Strength of MaterialsJohn Wiley & Son, 1874 - 444 σελίδες |
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Σελίδα 154
... weight in a vertical direction . Example : Suppose an iron ball , weighing 100 lbs . , be supported upon the top of a perpendicular post , ( Fig . 220 ; ) then the pressure exerted upon that post will be equal to the weight of the ball ...
... weight in a vertical direction . Example : Suppose an iron ball , weighing 100 lbs . , be supported upon the top of a perpendicular post , ( Fig . 220 ; ) then the pressure exerted upon that post will be equal to the weight of the ball ...
Σελίδα 155
... weight would be in that line . But , as it rarely occurs in systems of framing that weights can be supported by any ... pounds in the weight , W , So is the length of the line , be , To the number of pounds ' pressure resisted by the ...
... weight would be in that line . But , as it rarely occurs in systems of framing that weights can be supported by any ... pounds in the weight , W , So is the length of the line , be , To the number of pounds ' pressure resisted by the ...
Σελίδα 156
... pounds ' pressure resisted by the timber , b c . 3d . be : P : de : Q. 259. This relation between lines and pressures is important , and is of extensive application in ascertaining the pressures induced by known weights throughout any ...
... pounds ' pressure resisted by the timber , b c . 3d . be : P : de : Q. 259. This relation between lines and pressures is important , and is of extensive application in ascertaining the pressures induced by known weights throughout any ...
Σελίδα 159
... weight upon two inclined supports always exceed the weight . In the last case 24 tons exerts a pressure of 24 and two tons , equal together to 4 tons ; and in the former case , 1200 pounds exerts a pressure of twice 720 pounds , equal ...
... weight upon two inclined supports always exceed the weight . In the last case 24 tons exerts a pressure of 24 and two tons , equal together to 4 tons ; and in the former case , 1200 pounds exerts a pressure of twice 720 pounds , equal ...
Σελίδα 160
... pounds , or as many tenths of an inch as pounds , or as many inches as tons , or tenths of an inch as tons : or , in general , as many divisions of any convenient scale as there are units of weight or pressure in the known force . If ...
... pounds , or as many tenths of an inch as pounds , or as many inches as tons , or tenths of an inch as tons : or , in general , as many divisions of any convenient scale as there are units of weight or pressure in the known force . If ...
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The American House-Carpenter: A Treatise on the Art of Building, and ... Robert Griffith Hatfield Δεν υπάρχει διαθέσιμη προεπισκόπηση - 2016 |
Συχνά εμφανιζόμενοι όροι και φράσεις
12 inches a b c abutting according to Art ascertain axis balusters beam bevil bisect bottom flange brace breadth building cast arch centre circle column cornice cube root cubic foot curve cylinder decimal deflection describe the arc diameter dimensions distance dome door Doric order draw lines edge ellipsis entablature equal Example.-A Example.-What face-mould falling-mould fibres figure floor foot superficial framing girder given inches inclined inscribed angles intercolumniation intersection join joint length load middle mould multiplied obtained ordinates ovolo parallel parallelogram parallelogram of forces perpendicular piece pitch-board placed plane plank pressure quotient radius rafter rail resist ribs right angles riser roof Rule side soffit square root stairs strain surface sustain Table thickness tie-beam timber triangle triglyphs truss versed sine vertical wall weight in pounds white pine width
Δημοφιλή αποσπάσματα
Σελίδα 77 - And Cain knew his wife; and she conceived, and bare Enoch: and he builded a city, and called the name of the city, after the name of his son, Enoch.
Σελίδα 37 - AB of the circle into as many equal parts as the polygon is to have sides. With the points A and B as centers and radius AB, describe arcs cutting each other at C.
Σελίδα 305 - In oak, ash, or elm, the whole length of the scarf should be six times the depth or thickness of the beam, when there are no bolts.
Σελίδα 121 - ... than of a cone. This figure is the joint result of two calculations, independent of beauty of appearance. One of these is, that the form best adapted for stability of base is that of a cone ; the other is, that the figure, which would be of equal strength throughout for supporting a superincumbent weight, would be generated by the revolution of two parabolas round the axis of the column, the vertices...
Σελίδα 120 - ... cylindrical, but, since the lower part must support the weight of the superior part, in addition to the weight which presses equally on the whole column, the thickness should gradually decrease from bottom to top. The outline of columns should be a little curved, so as to represent a portion of a very long spheroid, or paraboloid, rather than of a cone. This figure is the joint result of two calculations, independent of beauty of appearance. One of these is, that the form best adapted for stability...
Σελίδα 127 - ... in this case, they partake of the nature of perpendicular walls, and are acted upon by the spreading force of the parts above them. The dome of St. Paul's church, in London, and some others of similar construction, are bound with chains or hoops of iron, to prevent them from spreading at bottom. Domes which are made of wood depend, in part, for their strength, on their internal carpentry. The Halle du Bled, in Paris, had originally a wooden dome more than 200 feet in diameter, and only one foot...
Σελίδα 123 - Walls of all kinds are greatly strengthened by angles and curves, also by projections, such as pilasters, chimneys and buttresses. These projections serve to increase the breadth of the foundation, and are always to be made use of in large buildings, and in walls of considerable length.
Σελίδα 58 - The circumference of every circle is supposed to be divided into 360 equal parts, called degrees ; and each degree into 60 equal parts, called minutes ; and each minute into 60 equal parts, called seconds ; and these into thirds, etc.
Σελίδα 125 - ... of it is necessarily superfluous, since no greater portion can act in supporting a weight above it, than can be included between two curved or arched lines. Besides the arches already mentioned, various others are in use. The acvte or lancet arch, much «sed in Gothic architecture, is described usually from two centres outside the arch.
Σελίδα 122 - ... inner half of the wall being completed with brick ; so that they can in reality be considered only as brick walls faced with stone. Such walls are said to be liable to become convex outwardly, from the difference in the shrinking of the cement. Rubble walls, are made of rough, irregular stones laid in mortar.