fixings for external hangers

[JohnD]

I am building a carport, and don't want the fixings to rust. the rafters are going on galvanised joist hangers, which I will paint before fitting.

I know it will have a roof against rain, but it is going to get damp from mist, dew and other condensation.

Would you use galvanised nails in the hangers, or should it be screws? I was thinking screws with a hex head would be easier to drive tightly than slotted or cross-headed, and would have a better bearing on the hangers.

 

[catlad]

Galv twist nails

 

[JohnD]

thanks

 

[noseall]

We always have at least a complete bag of these left over from every (engineered) joist or truss rafter job we do.

 

[JohnD]

are sheradised twist nails the same?

 

[catlad]

I think it has something to do with anti corrosion but you had better get someone to confirm it.

 

[^woody^]

Sheradising and galvanising are both zinc coatings, but different processes. Sheradising is an electro-plating process and gives a thinner coating to dipped galvanising.