Here’s one for the central northern areas.
I am working on detailing for a deck on a low slope (11″ in 16′), which has a 2 part rubber (torch down), membrane in place.
It slopes to the center of the roof, so it is like a very subtle gable roof. We are covering about half the roof with decks, which means 2x 16 x 18′ decks, that are connected at the ridge to each other (or built as one piece).
*you had to know that if I asked for advice it would be a good one!
Anyhow, I am thinking 2×8’s every 3′ running down from the ridge with 6×6 posts supporting the deck. The 2×8’s will bear on the substantial rafters below and connect to each side at the ridge.
Since this is a membrane roofing system I don’t want to perforate if I don’t have to.
For the engineers out there, I wouldn’t expect 100 mph to lift this deck up and pitch it onto the street (3rd floor). 150mph, maybe, but short of a tornado in the middle of toronto I can’t see it moving without fastening.
My initial thought is to use a cable connection to the masonry wall (8′ down the wall in 3 places each side of the building, maybe a 10′ long plate fastened in 5 locations. It may never be required, however it is there just in case.
Any thoughts? Creative ideas? How would you do it?
Thanks guys–
L
GardenStructure.com~Build for the Art of it! Decks Blog
Replies
Greetings Lawrence,
This post, in response to your question, will bump the thread through the 'recent discussion' listing again which will increase it's viewing.
Perhaps it will catch someone's attention that can help you with advice.
Cheers
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I rip tapered PT for joists at 16 or 24" OC and spot glue them to the deck with caulk compatible with the roof membrane.
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LGardenStructure.com~Build for the Art of it! Decks Blog