I am recycling my old external stairs and this time I am going to use hardwood treads, I have rebated 45mm and looking at using 32mm or similar, I have the stairs book from forest and wood, would it be ok to use 140 x 32 spotted gum (decking) x 2 each tread with a 6-10mm gap in the middle? Or would you use something else? I am keen for a 140mm board as probaly cheaper and less chance of twisting over time and water shouldnt pool.
Also what is the requirement for installing on the canterlever over the joist, i.e 3.6m joist with 1m over hang ( one stringer is hard up against bearer) , do you require a post to the ground? or can you just install a post from joist for handrail? The stairs will have a landing inbetween from deck height to ground ~3.2m
Any help would be appreciated.
Cheers
Barney


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