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Old 06-15-2010, 03:37 PM   #1
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Pergola Question


I decided to start this project over Mem Day weekend. As you can see, I'm almost finished but my neighbor is telling me it will never work because of the span and how I attached to the house.

Here's the details:
Posts - 4x4 wrapped by 2x6, 3ft in concrete, stand 11 ft tall, 5 ft apart
Header & Ledger - 2x8
Rafters - 2x6 (6 total) spaced ~20" apart
2x2 slats spaced 2" apart

The ledger is attached to the house using 5 big 'L' brackets on the open side of the patio. Unfortunately the rafters in the attic are parallel to the ledger, so the bracket is bolted into a beam in the ceiling (attic) that is set back 8" from the ledger. The last pic shows this better than I can describe. The other half of the ledger is attached to the brick using 4" mortar screws. Six total screws were used.

The span is just over 17' from the Ledger. Width ~ 14ft.

Will this work or do I need to add some other support somehow? If more support is need, where & how????
And if you have any suggestions for what would be good to grow on the lattice, that would be appreciated. Would like some type of evergreen vine.

Thx...melissa
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Last edited by mpearo; 06-17-2010 at 12:50 PM. Reason: Add additional photo
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Old 06-15-2010, 04:05 PM   #2
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Pergola Question


Where are you located ?
I think a 2x6 spanning 17' will sag
Need a pic of how the ledger is attached to the house

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Old 06-15-2010, 04:11 PM   #3
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I'm in Oklahoma. The last pic is the only one I have right now of how its attached to the house but its too dark to really see. I'll take another this evening and post tomorrow.
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Old 06-15-2010, 04:18 PM   #4
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I can see it sagging from here. Id be going with 2x8 anyway ( crown up) and a couple rows of blocks to help that PT from twisting. And I’m not sure I’m even happy with that.
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Old 06-17-2010, 12:25 PM   #5
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I added a photo to the original post of how the ledger is attached at the house/patio. The pic only shows about half of the ledger. The other half (left part of the ledger) is attached to the brick of the house.

As the pic shows, the bracket is bolted into a beam above the patio ceiling. That beam was 8" back from where the ledger needed to be, which is the reason for the long bracket. That beam was the only thing available to attach to in the attic.

If this is a problem, I'd like suggestions as to what could be done to make more secure.

Thx
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Old 06-17-2010, 02:43 PM   #6
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A little late now i guess, but you could have came over another foot or so to attach the ledger to the column after the opening. Definately go bigger than 2x6.

Worst case. "Coolaroo" makes some pretty nice shade covers that would go from the pergola to the house. Just a thought.

Oh and i really like the way hops look on lattice!

Last edited by gmhammes; 06-17-2010 at 02:46 PM.
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Old 06-17-2010, 03:11 PM   #7
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Had an idea to make the 2x8 ledger more secure but not sure it will work...any opinions????

Make 2 small holes into the ceiling, one on each side of the metal brackets shown in last pic. Use guy wire to loop around the bracket and feed wire into attic. The wire would be between the bracket and 2x8 ledger so not really even seen. In the attic, screw a bolt partially into a rafter and wind the guy wire ends around the bolt and slowly screw the bolt in further which would pull the guy wire up tighter as it winds around the bolt.

Yes, I know this is non-conventional engineering idea, but I'm not taking the pergola down and doing differently at this point.

Thx for your input.

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