Basic Swing Set Blueprints What Size Wood For Swingset?

What size wood for swingset? - basic swing set blueprints

What kind of wood beams of the waist and legs of a swing wooden base would be necessary?

My swing has much stronger since 4 ich environmental changes and last minute 13feet from the top bar and was 8 feet above the ground.

(a kind of pressure treated wood obviously)
Heres a link to a Swing --

http://www.comparestoreprices.co.uk/images/pl/plum-products-lemur-wooden-pole-swing-set.jpg

If you look at the basic plans that can drag you how.