LAYOUT DRAFTING & PATTERN MAKING
LAYOUT DRAFTING & PATTERN MAKING for Insulators Page 1 _________________________________ LAYOUT DRAFTING & PATTERN MAKING FOR HEAT & FROST INSULATORS Hans Siebert APPRENTICE WORK BOOK & JOURNEYMAN REVIEW MANUAL Hans Siebert-2000 _________________________________ LAYOUT DRAFTING & PATTERN MAKING for Insulators Page 2 Preface This book has been prepared as a text for use in Heat and Frost Insulator apprenticeship classes. It explains basic methods of drawing patterns for developing sheet metal and other types of protective covers commonly produced for wrap over insulation. The book does not attempt to teach field work-practices or any application methods used in the trade. Learning how to crimp, bead, seam, rivet and apply materials is best accomplished on the job, not from studying a book. However, for the limited purpose of PATTERN development, this book meets every requirement of an apprenticeship textbook and is, in addition, also well adapted for reference use by journeymen, foremen, and pre-fabrication workers engaged in the designing and/or laying out patterns .
pages should be carefully studied and worked with great accuracy, as the technical skill acquired in the use of the drawing instruments will be of great value in later work. Geometrical Problems When the problems herein given have been carefully studied, draw each problem, completing each step in the construction before proceeding to the next.
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