Читать книгу The Library of Work and Play: Home Decoration - Charles Franklin Warner - Страница 10

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Setting Batter Boards, Posts, and Sills.—The first step in actual construction was to mark off the lot and set the batter boards. These were made by driving three stakes to form a right angle about four feet from the point where each of the four main corners of the house was to be located. Two rough boards, one for each side of each angle, were nailed horizontally to each of the four sets of stakes, with their upper edges all brought to the same level. It is very important to set these batter boards with accuracy, since their function is to carry the lines which mark the dimensions and level of the ground floor. In the present instance their first use was to locate the concrete posts on which the sills of the house were to rest. Twenty-two of these posts, which were 4 feet long and 8 inches square, were put in position by first setting moulds or boxes, the interior dimensions of which were those of the posts, 3 feet deep in the light soil and filling them with a mixture of concrete and crushed rock. It was not thought necessary to remove the moulds after the hardening of the concrete. In fact, the sills were framed and placed in position resting on these boxes before sufficient time had been given for the concrete to harden. The sides of the boxes, however, were scored with a saw cut so that they could be easily broken off just below the ground, exposing the projecting ends of the concrete posts for about one foot. The sills were of 6 by 8-inch first quality spruce. They were set on the 6-inch face, the two long sills being spliced over posts, using a long halved joint. Mortise and tenon joints, draw-bored and pinned, were used at the corners. The floor timbers of 2 by 8-inch spruce were gained into the sills with the top faces flush with the top of the sill and crowning (i. e., bending) upward if at all. The spacing of the floor timbers was taken off at the sill on a strip of furring—spruce, ⁷⁄₈ of an inch thick by 2 inches wide—which was moved out to the centre near the line of bridging and lightly nailed, bringing crooked timbers into line. The bridging was then nailed in, the outside last to prevent springing the sills.