- Joined
- 15 Jul 2022
- Messages
- 92
- Reaction score
- 2
- Country
I have a patio structure done and now I want to attach the rafters.
The timber is about 4.7cm wide.
How long screws should I use to attach the rafters?
The rafter (birds mouth bit) is about 8.5cm thick.
The underlying timber is twice as thick so I think 16cm long screw would be enough.
Should I use 18cm long screws that are of 6mm diameter?
What drill size should I use for pre-drilling 5mm?
Or should I use brackets?
Are these soft brackets strong enough or should I get some sturdy ones?
On top I put EZ Glaze 3mn thick transparent polycarbonate.
The whole structure is rather strong 6x6 posts etc but of course I don't want the rafters to be lifted by wind one day.
The timber is about 4.7cm wide.
How long screws should I use to attach the rafters?
The rafter (birds mouth bit) is about 8.5cm thick.
The underlying timber is twice as thick so I think 16cm long screw would be enough.
Should I use 18cm long screws that are of 6mm diameter?
What drill size should I use for pre-drilling 5mm?
Or should I use brackets?
Are these soft brackets strong enough or should I get some sturdy ones?
On top I put EZ Glaze 3mn thick transparent polycarbonate.
The whole structure is rather strong 6x6 posts etc but of course I don't want the rafters to be lifted by wind one day.
