Pergola on deck

Joined
4 Feb 2017
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Hi Everyone,

Looking at building a pergola on the existing deck in our back garden.

With the layout of garden and deck, notching posts and using coach bolts to attach to deck isn't an option. Have been looking around for alternatives to fix the deck on top of the deck.

Looking for opinions on the post base brackets in the attached picture please or other suggestions to attach pergola to top of deck? If I use the items in the pic, I'd secure to deck joists.

Also can't attach to house as I will be putting it at the end of deck away from house, just covering a section of it.

Any suggestions greatly appreciated.

Thanks

Read more: https://www.diynot.com/diy/threads/pergola-on-deck.564649/#ixzz6nNrQeLwe Screenshot_20210217-101228_Chrome.jpg
 
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1 Mar 2021
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Firstly for a residential deck the correct way to install a deck is using posts (I prefer posts set deep and in a dry mix with gravel (not postcrete) then 6 x 2 beams from post to post running deck direction. Joists over 6 x 2's running perpendicular to final decking.

Looking at the fixing above and without any 'permanent structural fixing' the the house I would worry about sheering

Professionally I specify: Simpson strong ties CPT 44z, something I can get an M8/M10 mounted through. And from what you mentioned you will need an under plate to take the loading, probably an 4 x 4 offcut mounted between deck beams (not joists) and fixed using hangers and square twist nails. I would not advise just plonking a pergola on top of a deck with fingers crossed.

Gareth
(I design commercial and residential decks, but I don't fit them!)
 

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