## The American House Carpenters' and Joiners' Assistant: Being a New and Easy System of Lines, Founded on Geometrical Principles, for Cutting Every Description of Joints, and for Framing the Most Difficult Roofs; to which is Added a Complete Treatise on Mathematical Instruments. Also, Mensuration, Tables of the Weights and Cohesive Strength of the Several Materials Used in the Construction of Buildings, &c |

### From inside the book

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**constructing**of roofs ; to the mitering of planes and irregular surfaces at any angle ; to the mitering of circles , and to finding the joints in every variety of splayed work ; also to the elevations of the frame work of roofs , and to ... Page 16

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**constructed**of 1 inch boards . To draw the ribs to an oblong plan , determine first , the height of the ceiling . In this design the groin rib at Fig . 2 , is a semicircle ; consequently , it raises one half of the smallest span , and ... Page 25

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**constructed**, as it has all the advantages of a solid mass , without the great weight and the disadvantages of the shrinkage of material , which is almost entirely obviated by the crossing of the fibres of the wood . OBSERVATIONS ON THE ... Page 28

... Notwithstanding the apparent difficulty of

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**constructing**a roof of this kind , it may be done by calculation , and on scientific principles , as will be shown at Plates XXI and XXII . The plan of the roof , Plate XX , is 28 CARPENTRY . Page 37

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**constructing**a box of any size . It is usual to place the sides of all mill - hopper boxes at an angle of 45 ° . It may , however , be desirable to make the elevation of the sides greater or less than 45 ° , and it is therefore proper ...### Other editions - View all

### Common terms and phrases

26 Spruce St angle rib beam beam compasses bevel breadth Cast Iron circle circumference colatitude constructed copy cube root cubic feet depth describe the arc diagonal diameter divided draw the lines edge Eighths elevation ellipsis extent will reach Figure floor frame girders given line given number gnomonic projection half hypothenuse inches instrument Invented and Drawn jack-rafters Join joists length in feet limb line of chords line of numbers line of sines Lith 26 Spruce meridian method of finding multiplied nail number of degrees number of equal pencil perpendicular plane Plate polygon primary divisions proportional purlin quadrant quarter girt quotient radius regular polygons represent right angles right line roof rule Rule.-Multiply screw secants sector Shows the method slider sliding soffit square root straight line stroke subdivision tangents thickness transverse distance triangle truss vernier scale weight