heavy furniture. for our second floor deck, also with a slider near by, we went with Telescope marine grade polymer furniture with very deep cushions that slide on so they never blow around on the deck. they are amazingly comfortable, you don't bottom out when you sit on them, well worth the price.

this is near the ocean at our vacation home, at the end of the weekend (or if there was big weather coming) we slide them back against the house but really they arent going anywhere.

http://www.telescopecasual.com/collection/861/