The Cabin of this House-Boat
is to fit in the space, A, B, D, C of the centre-piece, Fig. 114. There is to be a 1-inch plank at each end (see Fig. 117), next to which the side-supports at each end of cabin fit. The supports are two-by-twos; so, allowing 1 inch for the plank and 2 inches for the upright support, the next pair of ribs will be just 3 inches from A B, Fig. 114, of the centre-piece (see Figs. 116 and 117). The twin ribs at the forward end of the cabin will be the same distance from D C, Fig. 114, as shown in the plan and elevation, Figs. 116 and 117. This leaves five pairs of ribs to be distributed between the front and back end of the cabin. From the outside of each end-support to the inside of the nearest middle-support is 2 feet 6 inches. Allowing 2 inches for the supports, this will place the adjoining ribs 2 feet 8 inches from the outside of the end-supports. The other ribs are placed midway between, as may be seen by the elevation, Fig. 117.
There is another pair of