Pergola Design Question

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Forum topic by Kent posted 09-11-2013 12:50 AM 946 views 0 times favorited 2 replies Add to Favorites Watch
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45 posts in 4031 days

09-11-2013 12:50 AM

First, I want to say hello and it is good to be back. You folks have been very helpful to me for a long time, but in recent months, I have just used google for a quick photo or simple answer. Well, I have an issue concerning a post and beam Pergola and I want to include some mortise and tenon joinery. I could not find the answers so then it then dawned on me…. LUMBERJOCKS !

i have a lot of questions actually, but I will start with this:

I have four 6×6 cedar posts erected and screwed down on concrete piers which go 36 inches deep (IL).

It will be 10’ x 4’. This is incorporated into my new deck and the space will be my outdoor kitchen.
It will have a cantilevered roof on both sides at an angle, so the joints need to be strong.

Question 1: I plan to join the four 6×6 posts to the four 6×6 beams at each corner. What mortise and tenon joints would you use at these joints and how do you make them? I am not adverse to using screws that are not visible but I like to see the pegs.

Question 2. I would like to learn how to make curved braces if anyone has any direction there.

I attach a picture of the project so far. The cantilevers will run toward you and away (as you look at the pic).

Thanks a lot for your time.

Urbana IL

2 replies so far

View MrRon's profile


5189 posts in 3440 days

#1 posted 09-13-2013 09:18 PM

I’m assuming the canterlever will run the 10’ direction. If that is the case, rain water will be running off to the left and right. This would not be good. Water would be running against the house siding.

If the slope will be from front to back, water will run off unto the patio deck, unless you install a gutter. Please clarify the slope direction you want to use.

View Kent's profile


45 posts in 4031 days

#2 posted 09-15-2013 01:12 PM

Thanks for your reply Mr.Ron.

I think I have my issues figured out, but I appreciate your reply.


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