. Greenhouse construction and heating: containing full descriptions of the various kinds of greenhouses, stove houses, forcing houses, pits and frames, with directions for their construction, and also descriptions of the different types of boilers, pipes, and heating apparatus generally, with instructions for fixing the same. Greenhouses. 44 GaBENHOUSE CONSTEUOTION AND HEATING. "courses" make just afoot of wall in height. Thus,- a piece of 9in. wall, 50ft. in length by 3ft. high, would require 50 X I = 66f or, say, 67 bricks in a single row ; multiply this by 12, the number of course
. Greenhouse construction and heating: containing full descriptions of the various kinds of greenhouses, stove houses, forcing houses, pits and frames, with directions for their construction, and also descriptions of the different types of boilers, pipes, and heating apparatus generally, with instructions for fixing the same. Greenhouses. 44 GaBENHOUSE CONSTEUOTION AND HEATING. "courses" make just afoot of wall in height. Thus,- a piece of 9in. wall, 50ft. in length by 3ft. high, would require 50 X I = 66f or, say, 67 bricks in a single row ; multiply this by 12, the number of courses, and again by 2 for the double thickness, and the result is 1,604 bricks. Of course, a small allowance must always be made for waste and breakage. There are several different ways of laying bricks in a 9in. wall. The "old English bond" consists of a "header" and a couple of "stretchers" laid alternately in every course, but the " stretchers " in one course must come exactly over the "headers " in the one below. Then there is the Flemish bond, the Yorkshire bond, and others ; but. Fig. 28. for greenhouse work as good a method as any is to lay alternate courses of "headers" and "stretchers," but always making the top course one of "headers," and, if possible, using a little cement in the last course or two, to make a sound job. In all brickwork, a joint in one course must never occur exactly over one in the next below. It is, however, necessary to have a "footing" of some kind before commencing a wall of either brick or stone. This may consist of one, two, or more courses of rough bricks laid in a shallow trench, each being a brick wider than the one above it (see Fig. 28). Concrete footings made with rough gravel, stones, or "ballast" (burnt clay),. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - colora
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectgreenho, bookyear1901
