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The Get a Builder Forum - Build a Sandpit
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| Author | Discussion |
| Getabuilder Team 125 posts |
Original message: posted 19-Mar-08 Building a sand pit 1. Saw eight sections of deck joist to form two square frames or ‘boxes’ that will sit one on top of the other. Each box requires two lengths of exactly 1m and two of 1.056m to allow for the overlap at the corner joins. Drill pilot holes and fix the joists together at each corner using two 100mm galvanised nails. 2. Lay one box frame in position on the ground and mark the outer corners with canes; join the canes with builder’s line or string to outline the hole. Dig the hole to the depth of the two stacked boxes. Put one box frame on top of the other and clamp them together, making sure they are flush and square. Then join them with a perforated metal plate in the middle of each side, secured with 25mm galvanised nails. 3. The exterior frame, made from deck boards, will rest on the ground, forming a seat around the top of the sand pit. To make it, take four pieces of 28mm x 144mm deck board. Secure each one in a workbench and cut one end to a 45° angle. 4. To cut the other ends accurately, line the deck boards up around the box, one at a time. Align the angled end with one corner and mark the point where it touches the next corner. Use this as the starting point for cutting the other end. If the box is exact, the inside, shorter edges of the frame sections will be exactly 1m long. 5. Working on a flat surface, glue the joints with a strong waterproof wood adhesive and then nail a perforated metal plate across the underside of each joint with 25mm nails. Wipe away surplus glue with a damp cloth, and leave to dry. 6. Once securely bonded, drill pilot holes and fix the seating to the top of the box with 75mm countersunk deck screws. Fill the holes with wood filler and sand smooth. 7. Now you can paint the frame. When it is dry, attach a sheet of pond liner or heavy-duty plastic to the bottom of the box with evenly spaced 10mm felt nails. 8. Scatter a thin layer of sand into the bottom of the hole and lower your finished box into it. 9. Use a garden fork to perforate the plastic liner. Make plenty of holes to allow for drainage and prevent your sand pit becoming soggy. Then fill it with play sand. It is best to cover a sand pit when it’s not in use to stop it getting water-logged. |
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