Building construction and superintendence, by F.E. Kidder ... (1896)
Kidder, Frank E. (Frank Eugene), 1859-1905 · New York, W.T. Comstock · leaf 354
e floor as it swings. For closing wide openings, separatedby posts, the author has found it anadvantage to divide the doors, as shownin Fig 364, the folds next the jambbeing but one-half the width of themiddle folds. By making the outerfolds narrow there is not the leverageon the jamb hinges that… … the folds are of equalwidth. The butts for the foldsnext the iamb should beof the best quality of steel(plated as desired), and 5or 6 inches high, but notmore than 4 inches widefor a i^-inch door. When there is room fora track above the doors,they may be suspended attheir centres by swivel…
Building
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