File:Mechanical Contracting and Plumbing January-December 1912 (1912) (14758740916).jpg

Identifier: mechcontract1912toro (find matches)
Title: Mechanical Contracting & Plumbing January-December 1912
Year: 1912 (1910s)
Authors:
Subjects: Air conditioning Refrigeration and refrigerating machinery Heating Plumbing
Publisher: Toronto : Maclean-Hunter Pub. Co.
Contributing Library: Fisher - University of Toronto
Digitizing Sponsor: University of Toronto

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Its sides A, B, C, D, being equal to the widestpart of Fig. 1 as S.S. Draw a line from the corner B to thecorner C and from the corner A to thecorner D, thus obtaining the mitrelines. The centre 0 must be directly belowthe point 1 on the elevation and the side B, D must be parallel to the centre lineO.P. Now lay out the stretchout line N.M.at right angles to the line O.P. Transfer the stretchout to this line,number same and draw the usualmeasurement lines through each num-ber. Now-place the T-sqr. parellel to thecentre line of Fig. 1 and either drop aline or make a mark on the mitre linesO B. and O.D. directly below the num-bers on the elevation. It will be found necessary to rub outthe mitre lines O B. and O.D. and draw fresh lines during the operation, asotherwise there would be so many markson the mitre lines as to cause confusion.Trace a line through the different points on the stretchout and the patternwill be developed.It will be noticed that the width of(Continued on page 22.)
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