Introduction (scroll down for Plans)
The footprint (ground area) of this swing seat support frame is 2700mm (9ft) x 2100mm (7ft).
The overall height is 2025mm (81").
Although this support frame is purpose-made for a particular swing seat, it can also be used to support numerous other utilities such as swings or maybe a glide-ride, and is even capable of accommodating certain types of gym equipment.
It is a very solid frame and basically consists of two end A-frames designed to minimize front and back movement, a beam which sits on top and two braces designed to minimize sideways movement.
The lumber used in this project is 100 by 100 (4x4) stock, which means that the lumber is 100 millimeters (4") wide by 100 millimeters (4") thick. This is a very common stock size and should be readily obtainable from most lumber or building supply yards. If you prefer to use smooth lumber as opposed to rough, that generally means that the wood has been planed or dressed and therefore the size of the lumber will be slightly smaller, but that does not matter.
Most important is that the lumber is suitable for outside use and strong enough for the job, which basically means the stock should be reasonably straight-grained and contain very few knots - definitely no big knots.
Your local lumber supplier will be able to advise you on the most suitable types of lumber available and also what safety precautions might need to be taken while working with any particular type of lumber. For example, when working with treated lumber you will need to wear appropriate clothing, gloves and mask while cutting or shaving and certain waste disposal and clean up rules must be adhered to.
Below are the plans followed by a description of each member.
[a] A-frame leg 100x100 (4x4) stock suitable for exterior use. Cut 4 pieces to length as shown above. Angle cut each end 26.6 degrees off square. There is more information on how to mark and cut the angles in the instruction page.
[b] Horizontal brace 100x100 (4x4) stock suitable for exterior use. Cut two pieces to length as shown above. Angle cut each end 26.6 degrees off square.
[c] Diagonal brace 100x100 (4x4) stock suitable for exterior use. Cut two pieces to length as shown above. Angle cut each end 45 degrees off square.
[d] Beam 100x100 (4x4) stock suitable for exterior use. Cut one piece to length as shown above.