Seesaw project

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Kids seesaw project

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Start shoveling in the wet concrete

Start shoveling the wet concrete into the tire.

Just add a couple of inches on the bottom first and try to get as much as possible into the rim.

Don't fill the tire too much at this stage or it might prove hard to put the central support unit in.

placing the seesaw central unit into the tire

Place the central support unit

Put the assembled central support unit into the hole in the tire.

Wriggle and twist it until it burrows into the wet concrete all the way down to the base.

Next top up the tire with more wet concrete.
Prod and poke and tap to ensure that the concrete is everywhere inside the tire.

checking that the seesaw support unit is at right angles to the tire

Check the front for square

Sit a straight piece of wood on top of the tire against the front of the support unit.

Put a large set square on the straight piece of wood against the support unit. You will then be able to see if the support unit is at right angles to the tire.

Make any adjustments to the support unit if need be.

Check the side for square

Repeat the same action as above, but this time to the side of the support unit.

Once the support unit is at right angles to the tire (which means that when the tire is horizontal or level, the support unit will be vertical or plumb), then remove the set square and piece of straight wood and allow the concrete to cure (set, harden) for a few days.

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