It's recommended that you get swing set plans instead of trying to design your shed yourself. Here is a good set of links to swing set plans: http://aboutswingsets.com/swing-set-plans/
build the frame from thick metallic rails or water pipes
bolts are better than welding. if you use pipes you can use pipe connectors
add X bands where needed to prevent the construction from wobbling and breaking
Discussions
11 years ago
You don't need a big tree, build a frame yourself as described here: http://www.ehow.com/how_2146738_build-aframe-porch-swing.html
It's recommended that you get swing set plans instead of trying to design your shed yourself. Here is a good set of links to swing set plans:
http://aboutswingsets.com/swing-set-plans/
11 years ago
I'd recommend good old-fashioned wood. Do a google search for "swingset plans" or something similar - you should find a few free plans.
11 years ago
build the frame from thick metallic rails or water pipes bolts are better than welding. if you use pipes you can use pipe connectors add X bands where needed to prevent the construction from wobbling and breaking