Hi,
I don’t know if this is the right section of the forum to post this up in, but it's related to architectural steelwork. I’ve got a quick question I’m hoping some of the forum members might be able to help with.
At work we’ve got a pair of steel steps that we’ve fabricated. The stringers are formed from 10mm thick steel plate, to which tread plates are welded (see pic below – sorry for the poor quality photo). This is the first time we’ve made stair this way – quite often we use mechanical fixings to support the treads, but welded joints are what have been asked for in this instance.
The problem we have is that the stringers have twisted slightly along their length. We’ve tried to un-twist them with some success by clamping one end to our welding bench and using turning bars to get leverage on them at the other end.
We also used a Bullfinch Autotorch propane brazing torch (unfortunately no access to oxy-acetylene kit) to try and heat up localised areas but it's not really powerful enough to get it up to a significant temperature.
We’ve managed to get the worst of the twist out of the first stringer we’ve tried, but there are still localised ripples which I recon will be harder to straighten.
Has anyone had experience with twisted stair stringers (or similar steel plate that should be flat but isn’t) and if so any hints n’ tips on sorting it out.
Thanks in advance.
Regards,
Mark
I don’t know if this is the right section of the forum to post this up in, but it's related to architectural steelwork. I’ve got a quick question I’m hoping some of the forum members might be able to help with.
At work we’ve got a pair of steel steps that we’ve fabricated. The stringers are formed from 10mm thick steel plate, to which tread plates are welded (see pic below – sorry for the poor quality photo). This is the first time we’ve made stair this way – quite often we use mechanical fixings to support the treads, but welded joints are what have been asked for in this instance.
The problem we have is that the stringers have twisted slightly along their length. We’ve tried to un-twist them with some success by clamping one end to our welding bench and using turning bars to get leverage on them at the other end.
We also used a Bullfinch Autotorch propane brazing torch (unfortunately no access to oxy-acetylene kit) to try and heat up localised areas but it's not really powerful enough to get it up to a significant temperature.
We’ve managed to get the worst of the twist out of the first stringer we’ve tried, but there are still localised ripples which I recon will be harder to straighten.
Has anyone had experience with twisted stair stringers (or similar steel plate that should be flat but isn’t) and if so any hints n’ tips on sorting it out.
Thanks in advance.
Regards,
Mark