Steel Single Stringer Staircase

[Triassic]

We have three floors in our new build and I need to find a quick and relatively cheap method of constructing staircases. I was thinking of constructing three basic L Shaped staircases using a box steel stringer with tread fixings welded to the spine. These will then be covered with timber treads, similar to the photo. Has anyone got any experience of constructing such things, any design pointers, best practice and indicative costs?

 

Edited June 9, 2019 by Triassic

[Onoff]

 

 

[ProDave]

27 minutes ago, Triassic said:

We have three floors in our new build and I need to find a quick and relatively cheap method of constructing staircases. I was thinking of constructing three basic L Shaped staircases using a box steel stringer with tread fixings welded to the spine. These will then be covered with timber treads, similar to the photo. Has anyone got any experience of constructing such things, any design pointers, best practice and indicative costs?

 

A "grand designs" non BR compliant stair.

[Triassic]

Hence the question, what design is compliant?

[Hobbiniho]

the general rule of thumb for domestic dwellings is if a 100mm sphere can pass through it it will fail, you also cannot generally build the handrail with horizontal battens as kids will use it as a ladder, that photo will fail as the complete right side is unguarded and there is also an unguarded area on the left at the window, the rise looks too big aswell i think a 100mm sphere will pass through under the tread

[ProDave]

But with appropriate "semi risers" (someone will know the correct term) and handrails that design could be compliant.

[Pete]

As @Hobbinihoand @ProDave mention the stairs have to pass BR. This is a picture of the staircase we are going to build for our house, the first thing our B/I said was that the gap is to big between the treads so you will have to do something to overcome this. BUT the thickness of the glass in the drawings is 12mm toughened and the staircase manufacturer said he would not be happy with that thickness and wants to use either 15/19mm toughened or at least 13.5mm laminated but my B/I was happy with 12mm. You win some you loose some. This staircase was built down South but seems to have been past by B Control there!!

 

[Mr Punter]

With this one the manufacturer used a piece of metal as a downstand at the front of the treads to satisfy the 100mm sphere rule.

 

[Onoff]

I reckon the tapered gussets under the treads go a long way to stopping a 100mm sphere. Not so sure at the ends but that could be tweaked.

 

[Triassic]

Thanks everyone, I chose the photo as an example of the type of construction of the single strings staircase. We’ve not even looked at handrails or spindles. To my mind to pass the 100mm sphere rule, I’d need either an upstanding or down stand at the rear of the tread, shouldn’t be too difficult to achieve.

 

Other examples of steel single stringer stairs and comments cost or on the ease of DIY manufacture and assembly most welcome.

[sean1933]

On 11/06/2019 at 07:01, Triassic said:

Thanks everyone, I chose the photo as an example of the type of construction of the single strings staircase. We’ve not even looked at handrails or spindles. To my mind to pass the 100mm sphere rule, I’d need either an upstanding or down stand at the rear of the tread, shouldn’t be too difficult to achieve.

 

Other examples of steel single stringer stairs and comments cost or on the ease of DIY manufacture and assembly most welcome.

 

How did you get over this conundrum in the end, did you do something yourself or have to go to a specialist? ... we are just starting this delightful staircase journey now, and our budget has been well and truly destroyed already. When I started this journey over 3 years ago I thought 10-15k would be fine for a nice floating step design....... apparently that's the starting from prices these days!

[Onoff]

35 minutes ago, sean1933 said:

10-15k

 

That's just BS! Either learn to weld & do woodwork or find a tame, local fabricator.