Building a pergola. Sizing

[Dannnnnnne]

Hello! I hope this ends up in the right section now.

I'm planning to build a pergola for the summer and I'm a bit unsure about the dimensions and the approach.

My house has an L-shape and I intend to build the pergola in the L and attach it to the facade. This is how it's intended to look from above.




I plan to attach two support beams to the facade 45x145, one in the north and one in the west. Then build a "frame" that is attached to the support beams and rests on the posts.

I then plan to finish the roof of the pergola in two parts, see the lower part of image 1. And then mount these onto the frame from image 2.

My question is, is it enough with 1 post in the right corner or will the beams bend if I don't have the posts I've drawn with question marks on the sketch?

Will 28x70 be too weak for the roof battens? They will be about 2.7m long so it might be flimsy, is 45x70 a better alternative?

I hope I have managed to convey what I mean here. All tips and ideas are warmly welcome!

 

[Freddedan]

I have built almost exactly the same pergola as you designed. The frame is 45x120 and the slats are 22x70. I also have a post at your question mark. It is very stable.

 

[Dannnnnnne]

I have built almost exactly the same pergola as you have drawn. The frame is 45x120 and the slats are 22x70. Also have a post at your question mark. It's very stable

Okay! Did you use 95x95 posts? And how long are the slats in yours? I'm a bit worried they will warp

 

[Freddedan]

The posts are 95x95 but that's just because it looks better proportionally. I have recessed the slats into the framework so they can't warp.

 

[Dannnnnnne]

The posts are 95x95 but it's just for better proportions. The slats are recessed into the framework so they can't warp.

How did you recess the slats into the frame? I am a bit unsure about how to attach the slats, if I prepare everything on the ground it will be quite heavy to lift up later.

Would you be willing to share a picture of how you've done it?

 

[Dannnnnnne]

Now I have refined the dimension and posts.
And I have decided to recess the slats into the frame to reduce the risk of the wood twisting and for aesthetic reasons. But then the next consideration came up!

What is the smoothest method for notching out a beam 75mm deep? The circular saw doesn't go that deep, right? And the jigsaw feels shaky.
Does anyone have good tips for that?

 

[fribygg]

What is the smoothest method for cutting a notch 75mm deep into a beam?

Handsaw.
Cut a maximum of 70mm if you are going to recess a standard 45x70

 

[Dannnnnnne]

Handsaw.
Saw max 70mm if you're going to recess a regular 45x70

I'm going to recess several 45x70 strips into a 225 joist, how do I remove the "block" if I saw with a handsaw?

 

[Freddedan]

Chisel!

 

[fribygg]

I'm going to embed several 45x70 slats in a 225 beam, how do I remove the "block" if I'm sawing with a hand saw?

Hammer and chisel are quick, easy, and precise enough for a pergola