Hatfield, Robert Griffith, 1815-1879. [from old catalog] · New York & London, Wiley and Putnam · leaf 167
upper edge,are closed by short pieces of boards, which rest on elects nailedto the beam along its whole length. This forms a floor uponwhich mortar is laid to the depth of about 2 inches, leaving butabout half an inch from its upper surface to the under side of thefloor-plank. 272.—Double floors. A… … Fig. 203. are the principal support, and of course reach from wall to wall.The bridging-joists, which support the floor-plank, are laid uponthe binding-joists, to which they are nailed; sometimes they arenotched into the binding-joists, but they are sufficiently firmwhen well nailed. The…
Carpentry · Architecture
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