What size beam do I need?

Use a minimum 4x6 beam for up to 3 swings. For 4 or more swings, upgrade to a 6x6. Use structural-rated lumber.

How far apart should swings be?

At least 24 inches apart on center, and at least 30 inches from the A-frame legs.

What should I put under a swing set?

At least 12 inches of rubber mulch, pea gravel, or engineered wood fiber. Grass compacts and does not provide adequate fall protection.

advanced

2-3 days

$400 - $900

How to Build a Swing Set: Safe & Sturdy DIY Plans (2026)

Prepared by Lumberama's Building Projects Team

|Last updated May 26, 2026|Sources & methodology

A wooden swing set is a backyard classic that provides hours of active play for kids. Building your own lets you customize the design and ensures you know exactly how strong the construction is. This guide covers a proven A-frame design using heavy timbers and commercial-grade hardware.

Key Takeaways

A wooden swing set is a backyard classic that provides hours of active play for kids.
Building your own lets you customize the design and ensures you know exactly how strong the construction is.
This guide covers a proven A-frame design using heavy timbers and commercial-grade hardware.
Use a 4x6 beam minimum for up to 3 swings and a 6x6 for 4 or more.
Only use commercial swing hangers with sealed bearings, never eye bolts.

Tools Needed

circular saw, miter saw, drill/driver, socket wrench set, post hole digger, level, tape measure, speed square, ladder, clamps, sandpaper

Materials List

4x6 or 6x6 top beam, 4x4 A-frame legs (6), swing hangers with bearings, swing chains (play equipment rated), swing seats, 3/8-inch carriage bolts, lag bolts, concrete mix, ground anchor brackets, wood sealer

Step-by-Step Instructions

Plan and Check Codes

Determine size based on number of swings. Allow 24 inches between swings and 30 inches from frame. Check local codes.

Build the A-Frames

Cut 4x4 legs at matching angles. Base spread should equal at least 2/3 of beam height. Bolt legs together at apex.

Set the A-Frames

Dig footings and set A-frame legs in concrete or use ground anchor brackets. Ensure plumb and level.

Install the Top Beam

Lift 4x6 or 6x6 beam into A-frame cradles. Bolt securely through both legs and beam at each end.

Install Swing Hardware

Attach commercial swing hangers with bearings to underside of top beam. Space per safety guidelines.

Hang Swings and Finish

Attach chains and seats using quick links. Ensure seat is at least 12 inches above ground. Sand and seal. Install fall zone surface.

Recommended Species

Pressure-Treated Pine, Douglas Fir, Western Red Cedar

Recommended Sizes

4x6 or 6x6 top beam, 4x4 A-frame legs

Pro Tips

Use a 4x6 beam minimum for up to 3 swings and a 6x6 for 4 or more. Only use commercial swing hangers with sealed bearings, never eye bolts. Maintain a fall zone of at least 6 feet in all directions. Use 12 inches of rubber mulch, pea gravel, or engineered wood fiber in the fall zone.