THE SWINGING ROPE
Upright--3" x 3" x 6'-9".
Top Piece--3" x 3" x 2'-9".
Upright and top piece are mortised or halved and bolted together.
Bracing at top (3" x 3" x 20½" at long point of mitre cuts) is nailed to top piece and upright at an angle of about 45 degrees.
Upright rests on a base measuring 3'-0". This is mortised together and braced with 2" x 3" material about 20" long, set at an angle of about 60 degrees.
Unless there are facilities for bracing at the top, as shown in the cut, the upright should be made longer and buried about 3' in the ground.
The swinging rope (¾" dia.) passes through a hole bored in the top piece and held in place by a knot. Successive knots tied 8" to 9" apart and a big knot at the bottom make swinging easier for little folks.
THE TRAPEZE
Two Uprights--3" x 3" x 6'-10".
Top Piece--3" x 3" x 2'-10".
Ends of top piece secured to uprights by being mortised or halved and bolted together.
Uprights rest on bases of 2" x 3" material, 3'-7" long, connected by a small platform in the form of an H.
Bases and uprights are bolted to dogs or pieces of wood 2" x 4" x 5'-8" set in the ground about 3'-0".
Adjustable bar (round) 1-3/8" dia.
3 holes bored in each upright provide for the adjustable bar. The first hole is 3'-0" above ground, the second 3'-5", the third 3'-10".
Swing bar (round), 1-3/8" dia., is 20" long. Should hang about 16" below top piece.
2 holes 5/8" dia. bored in the top piece receive a continuous rope attached to the swing bar by being knotted after passing through holes (5/8" dia.) in each end of the bar.