Design roof of Pagoda/Porch lean-to

[Steve Fractals]

Pagoda/Porch lean-to help

Hi all,

I'm planning on building a lean to pagoda/porch to mount solar panels on with a total panel weight of 100kg. Planning on mostly using 4x2 and 4x4 for the main structure but struggling with the roof pitch.

I was planning on using joist/rafter hangers bolted to a wall plate timber on the house wall with a pitch of around 30 degrees as ideal for solar panels. I don't know if I'm using the right search terms in google but cannot seem to find these rafter/joist hangers with a slope. I did find some that state adjustable but those were out of stock and very expensive.

I don't have to do the 30 degrees and anywhere between 25 to 45 would be ok but 30 is ideal.

Do any of you have a web link or at least the correct terminology for me to use to find these please as I don't think I have the DIY skill to do the notching thing?

 

[motorbiking]

Slope adjustable joist hanger.

The other option is to cut the wood at an angle and notch the joist end to fit a standard hanger.

 

[catlad]

Is this something free standing? if it is you don't need joist hangars.

 

[Steve Fractals]

Is this something free standing? if it is you don't need joist hangars.

No its a lean-to so it will be attached to the house wall.

 

[catlad]

You can just skew nail it to your ledger plate.

 

[Steve Fractals]

You can just skew nail it to your ledger plate.

Thanks but I'm going to be using Stongtie's hangers on the backplate and have sourced them now.

I now just want to check I have the angle I need to cut the backplate end of the rafter/lath timber to make sure its all flush and will give me the correct slope which is 35 degrees if I cut the end at 55 of my 7ft rathers and then have a 4ft height diff to front posts which the rathers will sit on but with a small notch and again a diff strongtie to hold together.

 

[catlad]

Steve unfortunately the only ironmongery I would be buying if I were doing that project would be a kilo of 5" galvanised nails. Joist hangars for roofing jobs hasn't been something I have used.