What kind of material on playground swing sets?

What kind of material on playground swing sets?

We choose only the finest material for our swing sets .Our entire line is constructed with 100% cedar lumber or scientifically named Cunninghamia Lanceolata, which natural anti-insect and corrosion, commercial-grade hardware, dual-bolt construction, heavy-gauge dipped safety chains, angled safety ladders, one-inch thick rope and interlocking notched-beam construction. Our massive solid-beam structures are held in place with recessed hardware and safety caps, and all our play surfaces are fastener-free.