## 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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**beams**or joists . First , let us consider a case where the load is collected at one point of the frame ; and , in ...**beam**, which , in a solid mass , would be too weak for the purpose . PLATE XIV . Let Fig . 1 be a piece CARPENTRY. ... Page 23

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**beam**, the strength of the frame will be a little more than three times the strength of the**beam**, and its firmness will be a little more than eight times as great as that of the**beam**. If the depth of the frame be three times the depth ... Page 24

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**beam**, supported by two posts , AC and BD , placed at equal distances from E , the centre of the**beam**. The pressure on each post will , obviously , be equal to half the weight of the**beam**. But if the posts be placed obliquely , as in ... Page 46

... the following ; viz . , Whole and halves . Proportional compasses . Triangular Compasses . Marquois's scales . (

... the following ; viz . , Whole and halves . Proportional compasses . Triangular Compasses . Marquois's scales . (

**Beam**Compasses . Plotting scales . The pantagraph . Sliding Rule . ON DRAWING COMPASSES . - This instrument consists of two. Page 57

... computed arithmetical values , taken off by means of the

... computed arithmetical values , taken off by means of the

**beam**compasses hereafter described , and corrected by the aid of Bird's vernier scale .. Set one foot of the compass upon the center o MATHEMATICAL INSTRUMENTS . 57.### 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