Summary

This is a 1/10 scale model of a swing. And you can make a full-scale swing by multiplying this model by 10.

[1/10 model]
-Board material ... 3D print
-screw ... M3 bolts & nuts x 18pcs

Since the size of the board is exactly 1/10, the screw should be M1.2. But I am using M3 because it seems difficult to obtain the M1.2 screw. The holes for the screw are also enlarged for M3. Therefore, there is a tight part to insert the M3 nut, but if you force it, it will be inserted.

[full scale swing]
-Board material ... top board: 2x6wood, other boards: 2x4wood
-screw ... M12 bolts & nuts, bolt length=150mm x 14pcs, 180mm(for top boards) x 4pcs