Bolting treads to steel stringer

[Schumi]

Hi,

My welder who is fabricating a set of steel stringers for me has asked me how many fixing points I would like per tread.

I will be using 2 140x45 per tread. From any experience out there is 1 bolt per 140x45 sufficent for each side or should I be using 2 per piece.

The treads will be bolted to 255mm angle which is welded to the stringer so there will be a slight over hang on each end of about 10-15mm.

From my understanding any overhang between treads should not be included in the overall run is this correct?

I have decided to fabricate a set of stringers out of ply as template prior to handing over all the measurments . I have learnt my lesson once before when using steel.

Thanks

Anthony

[mijati]

Using 2 bolts each end will ensure the timber tread doesn't skew over time.
Good luck with it...

[Bloss]

Using 2 bolts each end will ensure the timber tread doesn't skew over time.
Good luck with it...

:whs: Two each side minimum. Go to forum member blocklayer's (Greg) site for help in designing the stairs: Builders Construction Calculators - Contractors, Tradies and DIY (http://www.blocklayer.com/) more precisely here: Stair Calculator - Layout Stair Stringer, Headroom Rise Run - Metric (http://www.blocklayer.com/Stairs/) :2tsup: