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SA_Cowboy
Attached Pergola
SA_Cowboy

We recently purchase a house which has an 8'x12' covered porch and I would like to place the pergola to the side of it to increase the shaded area in our backyard. I will be building a 16'x12' pavestone patio next to the current cement patio and would like to build the pergola over this (I would build the pergola first of course and then do the patio). The pergola will be attached to the house via a ledger board on the fascia of the roof and will then extend out with the furthest posts placed at approximately 15'. 2x6 beams would extend from the ledger board to 2x6 boards anchored on either side of the posts, and then the top beams would be 2x2s. You can see below to see what I am thinking of. My question is, with that span do I need another 2 posts in between the house and the outer posts (as shown in the image below) to prevent sagging, or will just the 2 posts be enough? Thanks!

Here is what I am thinking of:

this seems to be a little small here - here's the link to the regular size picture for more clarity:

"https://picasaweb.google.com/lh/photo/xYjvEE5eiqg_eOeg_w1do19mBsNvW_dojs..."

jeffcat
Re: Attached Pergola
jeffcat

At 15' in length I would suggest adding another set of columns. While there is not a large amount of weight on pergolas, time does have a way of doing things. If you didn't use another set of columns, another option would be for larger bracketed support that extends toward the midline of the pergola from the 4 columns. Even, so I would suggest adding 2 extra columns. This provides nice support especially if you are using 16' cut lumber.

dj1
Re: Attached Pergola
dj1

To avoid future sagging, install additional posts.

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