Wall plate size

[b21playa]

Hi all

Just built a single skin concrete shed which will have a flat roof on it. Does the wall plate need to be 4x2 or 4x3? It will have 6x2 c24 joists on it.

Thanks in advance

 

[tony1851]

Wall plates are better at 4x3 - more meat at the overlaps at corners, and less tendency to split when nailing the joists down.

 

[^woody^]

Flat roofs don't have wall plates.

 

[b21playa]

Flat roofs don't have wall plates.

What do they have? I just assumed it was similar to a pitched roof. My ‘flat’ roof has a 2deg pitch and was thinking of attached wall plates and then birdsmouthing the joists over these

 

[^woody^]

Nothing. The joists are built in.

 

[b21playa]

Oh right. Looks like I’m doing the unconventional way, but guessing it will still work. I didn’t create it flat and use firings strips either as facia board becomes too deep.

 

[b21playa]

Ended up going with 4x3, strapped every 1.5m