Bolts

Building a Treehouse

... Try to avoid damaging the tree when you are securing the foundations – use rope where possible or large, strong screws or bolts. ... www.homeimprovementpages.com.au/article/Treehouse

Check the Deck

... Check that metal fixtures such as bolts, screws and brackets are not rusting. Check for any cracking in concrete. If you are unsure ... www.homeimprovementpages.com.au/article/Check_Deck