Now I have measured and checked where the beam and joists go and planned the pergola accordingly. Do you think it is possible to skip the center post from my previous drawings and move it in a bit, according to the images?
The posts are 95x95 and the joists are 2 pieces of 45x145 screwed together, found a user in the forum who had built with this dimension. If I increase the dimension, I would probably need to attach to the eaves instead, which I would prefer to avoid.
Alternatively, I attach beams to the eaves instead, which gives a little more height. But if I need to attach a beam to the eaves to have something to screw into. I'm a bit worried that water will get trapped between this beam and the eaves?
What do you think about the construction, is this number of posts sufficient and are 2 glued 45x145 around enough? Standing on 95x95 posts.
Edit:
This is what I'm considering now, to attach to the eaves for a little more height, but is one post sufficient in this position, and how do I make the corners for good torsional rigidity?
5 m is too long a span; the rule will sag considerably. So, an additional post is necessary. It doesn't have to be placed in the middle but can be positioned where it's suitable, about 1.5-1m from one side at the least.
Can you check the latest drawing I posted? I've placed a post 1.4m from one side. Is this sufficient, or do I need another post? Alternatively, should I move this post to the middle?
Can you check the latest drawing I posted? I've placed a post 1.4m out from one side. Is this enough or do I need another post? Alternatively, should I move this post to the middle?
That might work well. But you need to get a foundation under the posts as close to the ground as possible and then secure the posts properly in the joists for torsional rigidity. The windbreak/lattice can also improve torsional rigidity depending on how they are constructed. Make sure to fasten the top rail properly down into the corner post, as there will be some lifting force there.
That could work well. But you need to get a foundation under the posts as close to the ground as possible and then attach the posts securely to the framework for rigidity. The windbreak/trellis can also improve rigidity depending on how it is constructed. Make sure to attach the top beam securely into the corner post as there will be some lifting force there.
Yes, exactly, a foundation has been purchased and will be buried for the "middle post". The other two posts are next to existing foundations, will make sure to attach the posts securely to the framework.
Starting to come together now, can't decide if I should have 2x 45x145 all around or if just 1 45x145 is enough. Doubling up will surely make it stronger, but it also makes everything much heavier, which could make a big difference on the part with a lot of overhang without a pole:
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Marcus0321 said:
