. Cyclopedia of architecture, carpentry, and building : a general reference work .... together,and the length of the hip bar e f in Fig. 187 will be equal to B O in and 10^ O added together. Use the same method where fraction-al parts of an inch occur. In laying out the patternsaccording to these measurements use the cuts shownin Figs. 178, 179, 180, and 181, being careful tomeasure from the arrowpoints shown on each pattern. It wall be noticed in Fig. 178 we always meas-ure on line 4 in the patterns |or the hip, common,and jack bars. This is done because the line 4 inthe profiles E an
. Cyclopedia of architecture, carpentry, and building : a general reference work .... together,and the length of the hip bar e f in Fig. 187 will be equal to B O in and 10^ O added together. Use the same method where fraction-al parts of an inch occur. In laying out the patternsaccording to these measurements use the cuts shownin Figs. 178, 179, 180, and 181, being careful tomeasure from the arrowpoints shown on each pattern. It wall be noticed in Fig. 178 we always meas-ure on line 4 in the patterns |or the hip, common,and jack bars. This is done because the line 4 inthe profiles E and E^ come directly on the slant lineof the triangles which were traced to Figs. 184 and185 and from which the true lengths were a curb might be used, as shown in Fig. 188,which would bring the bottom line of the bar Ihinches toward the inside of the frame h, all around, then instead ofusing the size of 4 x 8 feet as the basis of measurements deduct 3inches on each side, making the basis of measurements 3 ft. 9 inchesX 7 ft. 9 inches, and proceed as explained 237 SHEET METAL WORK ROOFING A good metal covering on a roof is as important as a good foun-dation. There are various materials used for this purpose such as terneplate or what is commonly called roofing tin. The rigid body, or thebase of roofing tin, consists of thin sheets of steel (black plates) thatare coated with an alloy of tin and lead. Where a first-class job isdesired soft and cold rolled copper should be used. The soft copperis generally used for cap flashing and allows itself to be dressed downwell after the base flashing is in position. The cold-rolled or hard cop-per is used for the roof coverings. In some cases galvanized sheet ironor steel is employed. No matter whether tin, galvanized iron, orcopper is employed the method of construction is the same, and willbe explained as we proceed. Another form of roofing is known as corrugated iron roofing,which consists of black or galvanize
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