Thread: Staircase problem and BCA

Originally Posted by dan76n

I think I understand all that.
Would I be correct in saying that "Risers must be between 190mm-115mm" means from tread to tread must fall into these measurements?

Yes, in this case it is measured as the difference in height from the top of one tread to the next.

You can slope the tread so that the riser height is at max.

I would of assumed the treads had to be level, not sloping?

I think that's why gaza's caption is hammerhead

a small slope is ok, have done it before got passed bca.

Originally Posted by Gaza

a small slope is ok,

It is not.

Originally Posted by Gaza

have done it before got passed bca.

That does not even make sense

To be honest even if you can have a slope I think it would feel rather weird walking down them.

i am talking about 2 or 3mm across 250mm not 50mm.

it was just enough across 10 risers to again the 20mm we needed.

190mm max rise top of tread to top of tread.
115mm min. rise top of tread to top of tread.
Max. gap of 125mm between treads.
No slope on treads.
Max. of 1 in 40 or 1 in 50 [ I can't remember without looking it up ]slope on [legal size] landings is permitted.

Originally Posted by ausdesign

190mm max rise top of tread to top of tread.
115mm min. rise top of tread to top of tread.
Max. gap of 125mm between treads.
No slope on treads.
Max. of 1 in 40 or 1 in 50 [ I can't remember without looking it up ]slope on [legal size] landings is permitted.

I thought I should have known allowances for tread out of level.
Upon looking it up I can confirm Peter it is 1:50 for landings (3.9.1.3.h.iii.).
But no where the trueness of a tread is mentioned, its implied in figure 3.9.1.2 but not stated.
Are you aware of any place?
Thanks

Brett Thompson