stairs

[Dregen]

Hello

What is the maximum span for a 45 x 170 as a tread on a staircase, meaning they're laying flat.
In other words, how wide can I make the staircase without having a stringer in the middle, I was thinking 1200 mm.

 

[Qtec]

Sounds like it would go well, wood is a strong material! Make sure to choose a material with as few knots as possible, as each knot weakens the material. Also, avoid using glue in your construction, as the wood moves with changes in humidity, which can result in a staircase that creaks more!

 

[Snowsmile]

Hi

How long can the span be for 45 x 170 as a plan step on a staircase, meaning they will be laying flat. How wide can I make the staircase without having a center stringer? I was thinking 1200 mm.

Sounds long to me, I think you'll get deflection... but I'm just guessing... try placing a 45x170 between two Leca, for example, on the ground and step up with at least 90 kg load... I think there will be a good bend in that piece of wood...

 

[Qtec]

I just assumed in my previous answer that you would be using laminated wood. If not, I also think they will bend too much?!

 

[Styx]

Hello

What is the maximum span you can have on 45 x 170 as a tread on a staircase, meaning they are lying flat.
In other words, how wide can I make the staircase without having a support stringer in the middle, I was thinking 1200 mm.

Maybe you can place something like 45-120 as a riser underneath and thereby reinforce your tread.?

 

[smil]

If you have sättsteg (a closed staircase), it's completely fine. But otherwise, you probably have a child safety strip, which you can use for example 45x70. Depending on how you attach it, it can help to reinforce the step. I don't think it should be a major problem. But preferably glued wood, of course.

 

[jon_h]

Edge-glued wood is hardly stiffer in bending than regular wood, but it might withstand more before it breaks. So the deflection will probably not be less.