The B Poles
on them on each side of the two trees, as in Fig. 1. Nail the B poles securely to the tree, and with plank or half-round sticks floor the space between the trees, and you will have a good landing below your house (see Fig. 5) from which a ladder may be run to the proposed foundation. After the upper rods have been nailed to the trees and a ladder adjusted, and for security nailed fast to the tree and lower platform, you are ready to begin the serious work of building. Take a good strong plank, two inches thick, and cut two pieces about six feet long, and shaped as shown by
The Corbel Piece D
in Fig. 2; then cut four struts (E, E, in Fig. 2) and two king-posts (C, Fig. 2). Shave off the ends of the struts, as shown in the diagram, to fit the notches cut in the corbel pieces and the king-posts.
Fig. 4.—Perspective View of Corbels Resting on B Sticks.
It is not necessary to spike this frame together—the big nails might split the timber—they may be fastened together slightly with wire nails and strengthened by a piece of hoop-iron nailed on with small nails, as shown in Fig. 2 at F, F, F, F, and this will keep the pieces from accidentally slipping out of their bearings, or holes may be bored and the parts held together with screws. The real strain being an up-and-down thrust on the notches, the weight will not bear upon the iron bands or screws. Great care must be taken to make neat-fitting joints.
Fig. 5.—A Two-Tree House.