How to build a Tree House with a Slide and Swing-Set
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Step eighteen:
Tap and knock over the remaining uncut bits between the tread lines with a hammer.
Then clean out the grooves with a sharp chisel. The more saw cuts that were made, the easier the chiseling.
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Step nineteen:
Insert the front treads into the rebated grooves.
Remember, each tread is made up of two pieces of 150mm x 50mm (2"x6") stock.
Hold them in place with little nails angled through the bottom edge of the treads into the stringer.
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Step twenty:
Place the other stringer on top of the treads mirroring the bottom stringer.
Nail through the stringer into the treads using 100mm (4") or 90mm (3 1/2") galvanized nails: 3 nails per tread per side.
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Step twenty-one:
Fit the back treads in place.
Tap them along the tread groves until they are about 10mm (3/8") from the front treads.
Nail through the stringer into the treads using 100mm (4") or 90mm (3 1/2") galvanized nails: 3 nails per tread per side.
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Step twenty-two:
Fix the steps in place. Nail the top of the stringers to the landing.
Temporarily pack with blocks of wood under the bottom tread until treads are level.
Dig a hole 250x250x250 (10"x10"x10") under each stringer and fill with concrete. Place a galvanized wire or bracket into the wet concrete against the two stringers.
When the concrete has cured, place a piece of damp course membrane under the stringer and on top of the concrete pad. This prevents moisture from the concrete pad leaching into the lumber.
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Page 6: Instructions - The Steps