This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1856 Excerpt: ...In this case, a hollow must be mitred round the internal angle of the under side of the tread and face of the riser. Sometimes the string is framed into a newel, and notched to receive the ends of the steps; and, at the other end, a corresponding notch-board, and the whole of the flyers are put up in the same manner as a step-ladder. By paying proper attention to what has here been said, a workman of good understanding will be able to execute such stairs, and put them up in the most sufficient manner, although he might never have seen one made or put up before. Bracketed Stairs. 149. Here the same method of laying down the plan and section must be observed as in dog-legged stairs. The balusters must be neatly dovetailed into the ends of the steps, two dovetails being put in each, in such a manner that one of the balusters may have one of its faces in the same plane with the riser, and the other face in the same plane with the face of the bracket., Geometrical Stairs. 150. The steps of Geometrical Stairs ought to be neatly finished, so that they may present a handsome appearance. The riser and step-boards ought not to be less than one inch and a quarter thick. The risers and step-boards ought to be well glued and secured together, with blockings glued in the internal angles. When the steps are set, the risers and step-boards must be fixed together by screws, passing from the under side of each horizontal part into the riser. The brackets must be mitred to the risers; and the nosings, with a cavetto underneath, should be returned upon the brackets, and stopped upon the string-board. The under side may be finished with lath and plaster. In many old buildings, where the principal stairs were A NEW METHOD OF CONSTRUCTING A CIRCULAR GEOMETRICAL STAIRS FIC.I. ELEV...
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