To make this project easier you can have your timber pre-cut at Bunnings. Here's our cutting list:
2250mm x 600mm x 30mm ply
35mm x 2.4m dowel
90mm x 45mm x 2.4m structural pine
Measure and mark where you want your workbench to go in the garage. We put ours in the middle of the wall. Measure 900mm up from the floor and mark the middle of the wall.
Measure and mark the centre point on the two 945mm lengths of structural pine, which will act as supports for the workbench. Make two marks in the middle of the timber near both ends for the two support screws.
Clamp the structural pine to the workbench. Use the 5.5mm drill bit to pre-drill three holes for the support screws.
Hold the first pine support against the wall at the correct height, making sure it's level. Drill three holes that just touch the bricks. This will mark the spots you want to drill directly into the wall.
Use the hammer drill and 8mm masonry bit to drill three holes where you've just marked them.
Insert the 8mm wall plugs into the drilled holes. Hold the timber against the wall with the holes aligned. Use the drill and 100mm bugle screws to attach the support to the wall. Repeat these steps to also attach the lower support piece to the wall.
Place the dowel on top of the ply and trace around it. Make the outline a bit bigger so the dowel will fit snug. Use the square to make the lines straight. Repeat this step for the three other brackets.
Secure the ply to the workbench. Use the 5.5mm drill bit to drill two holes in the corners of the dowel outline. These will be your entry point for the jigsaw blade. Use the jigsaw to cut out the brackets for the dowel, rounding out the corners. Repeat this for the three other brackets.
Use the 120 grit sandpaper to smooth the edges on each bracket.
Use a bracket to clamp the timber to the workbench. Pre-drill four holes in each corner. Repeat this for the three other brackets.
Attach the hinges to the underside of the workbench using the screws that come with the hinges.
Place pieces of packer between the workbench and the wall support. Use the screws that come with the hinges to attach it to the wall support.
Slide the dowel legs into their brackets so that they support the workbench.