Home instruction for sheet metal workers . each side and this is closed by soldering over it a concave metalbutton. The quadrants must be riveted to the movable louvres beforethey are placed in position, and after the louvres are in placethe operating bar is riveted to them, as in the sectional view,Fig. 409A. When this has been done the finished louvres willlook as in Fig. 410, which shows the stationary louvres on the 294 Home Instruction for Sheet Metal Workers outside and the inside of the movable louvres with the quadrantsand the operating bar e. Fig. 414 shows a reversed view. It will be
Home instruction for sheet metal workers . each side and this is closed by soldering over it a concave metalbutton. The quadrants must be riveted to the movable louvres beforethey are placed in position, and after the louvres are in placethe operating bar is riveted to them, as in the sectional view,Fig. 409A. When this has been done the finished louvres willlook as in Fig. 410, which shows the stationary louvres on the 294 Home Instruction for Sheet Metal Workers outside and the inside of the movable louvres with the quadrantsand the operating bar e. Fig. 414 shows a reversed view. It will be noticed that a rail or angle, Fig. a b 417, has beenplaced along the top of the posts. While in large size louvre workthis angle frame is employed, in small skylights, where the entireskylight can be finished in the shop, it can be omitted and the sky-light placed directly over the posts, as in the sectional views inFigs. 409 and 409A, and as completed Fig. 408. Should the louvreframes under the skylight be of such lengths that they can-. Fig. 417. View of Outside of Leuvres. not be joined to the skylight in the shop, each side is usuallyfinished complete, Fig. 418, A B C D. In this case the posts,abed and c, are set square with the curb D C and upper angleA B, and the louvres put in position. The sectional view of the posts is shown below. The studentshould note that the corner posts a and e are half posts, theconnecting half being similar to /. Then when all of the sideshave been hoisted to the roof the miters at the corners are sol-dered, locking / to a and closing the inside angle with h. Thismethod allows di easy transportation to the building. A sectional view of the louvre frame is given in Fig. 419, whichshows a frame, A B, used for heavier construction. Note thatthe lower curb is formed by A B C D, fastened to the wood curbat a the distance between the flanges, B and C, being equal to thethickness of the wood curb. The flange, C, keeps the curb from Construction of St
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Keywords: ., bookcentury1900, bookdecade1920, bookpublishernewyo, bookyear1922
