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Post by modernist on Mar 26, 2008 22:41:13 GMT
Can I ask for advice from you regarding BC and stairs. I am proposing to build the attached on a steel spine of 180 x 180 x 6 hollw section with welded brackets supporting 50mm Ash treads with 75mm semi risers and a pair of diagonal winders. The balustrades will be stainless tube bolted to the treads and plate glass between (all gaps <100mm). the angle is 42.2 deg Will this be OK from the regs point of view? thanks in advance and for the sketchup help to get it here! (I'm still a novice at that) Brian  |
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Post by jfc on Mar 26, 2008 23:01:43 GMT
220mm is the min going on a tread so unless you add a nosing it could be the first thing they pick up on .
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Post by mrgrimsdale on Mar 26, 2008 23:01:49 GMT
It's quite complicated but basically your large winders don't conform to regs - too short going to be landings and too long to be treads. It's either 3 or non (non = a square landing). I could be wrong!
cheers
Jacob
PS oh yes and Jason's 220mm. Adding a nosing doesn't do it as you are effectively taking it off the back of the one below.
PPS just looking at the regs ; the going on a line 270 in from the centre should exceed 220, which is OK on your drawing, but at 270 in from the outer line drawn from the centre, 2xrise + going should not exceed 770, i.e. not OK
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Post by modernist on Mar 26, 2008 23:09:03 GMT
Thanks both. I can't have no winders as that would push the bottom stair out past the wall so if I had 3 then I would need one less up the main run which would open out the going to over 220mm.
Maybe a solution there.
Brian
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Post by jfc on Mar 26, 2008 23:10:28 GMT
Yup the winders do need to be the same going in the middle of the winder but if you put a landing in you could then extend your treads . Last time i made a turn staircase it was 220 min going per tread and 220 max rise , this was last year and local council so it may have changed as a new spotty faced tw*t may well have been promoted to building control ;D
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Post by jfc on Mar 26, 2008 23:16:05 GMT
Ahhh you posted the same time as i did , The landing can be min 900 i think but it is late and i could be wrong .
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Post by modernist on Mar 26, 2008 23:22:58 GMT
a new spotty faced tw*t may well have been promoted to building control ;D I've met her ;D Brian |
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Post by modernist on Mar 26, 2008 23:24:25 GMT
Finish the night on a high. I see I've gained another McDonalds Star ;D ;D Yippee
Brian
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Post by jfc on Mar 26, 2008 23:24:34 GMT
Ahhhh but the run of a staircase is not the going of a tread , you need to take the handrail height from the run but not the going of a tread .
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Post by mrgrimsdale on Mar 27, 2008 6:30:31 GMT
Thanks both. I can't have no winders as that would push the bottom stair out past the wall so if I had 3 then I would need one less up the main run which would open out the going to over 220mm. Maybe a solution there. Brian You've drawn in a top step. Couldn't you miss that out too and give yourself more run? cheers Jacob |
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Post by modernist on Mar 27, 2008 10:27:05 GMT
Yes I drew in the top step just as a reference and it won't actually exist. Doesn't give me more run though.
I am going to re-draft it with 3 winders and see what it looks like.
Does the going in the centre of the winders have to be the same as the rest of the goings?
Brian
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Post by jfc on Mar 27, 2008 10:35:25 GMT
I always work it on 50mm at the newel and the going to the c/l of the winders min 220mm . So yes i make the going at the centre of the winders what ever my tread going is .
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Post by mrgrimsdale on Mar 27, 2008 11:00:40 GMT
Yes I drew in the top step just as a reference and it won't actually exist. Doesn't give me more run though. I am going to re-draft it with 3 winders and see what it looks like. Does the going in the centre of the winders have to be the same as the rest of the goings? Brian Yes up to a certain width, after that it's between limits. Google for details, or I've got the book here if you want to pop over. cheers Jacob |
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Post by pitbull on Mar 28, 2008 18:25:24 GMT
can you make the stair width under 1 metre wide as I presume your width is 1032, which in turn will give you a smaller width of winder, which will give you your 220 minimum going, As long as your winders are equal sizes and they don't exceed the 2R+G you will be fine. The going of the winder doesn't have to be the going of the straight treads, they just have to be equal and not exceed the formula of 2R+G. A narrower stair will elimiate the 2 handrails also.
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Post by modernist on Mar 28, 2008 22:21:58 GMT
Well I've certainly tapped into a font of knowledge here. Thanks to you all. I'll post the next version shortly for comment.
(how do you do multiple quotes?)
Re Pitbull what extra handrail?
Re Jacob - I'm working away from 6th for two weeks - well one hols and one work. So I'll try and call you next week to see if it is OK to visit.
Cheers all
Brian
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Post by pitbull on Mar 29, 2008 14:17:13 GMT
A stair wider than 1m will want a handrail on either side of it ie one up the wall.
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Post by wrongnail on Apr 6, 2008 9:40:28 GMT
Axe the stairs. Just fit a Stannard or an Otis. End of pain. (Maybe!)
Glad I am retired! No more spotty-faced t***s! Male or female.
John
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