Gather your supplies:
• 2400 x 100mm round- edged treated pine sleepers (2) (posts)
• 200 x 75mm treated pine sleeper (beam)
You’ll also need:
Power saw; Dulux 1 Step Primer, Sealer & Undercoat; post hole digger; quick-set concrete (2 bags per hole); drill; 115mm galvanised screw eye (8); 6mm quick links (8); 6.5mm galvanised chain; Dulux Weathershield Low Sheen Acrylic (we used Colossus, Symphony Red, High Blue)
Use power saw to cut round-edged treated pine sleepers in half to create four 1200mm posts. (You will need to cut through both sides to cut full depth.) Paint all sleepers with 1 Step Primer, Sealer & Undercoat. Let dry.
Put beam in desired position. Measure and mark 400mm diagonally from each beam corner. Use post hole digger to dig a 600mm deep hole at each point. Angle holes back towards corners of beam.
Put a post in hole. Half-fill hole with water, add quick-set concrete and mix. Let set. Repeat for all posts.
On narrow side of beam, drill 4 pilot holes 100mm from ends and fix a 115mm galvanised screw eye to beam at each point. Use a quick link to attach length of chain to screw eye. Repeat at both ends of each narrow side of beam.
Attach screw eyes to inside of posts two-thirds of the way up. Use quick links to attach chains on beam to screw eyes. Make beam as level as possible.
Paint beam and posts in 2 coats of acrylic paint, allowing to dry after each coat.