On 1 Mar 2005 07:40:58 -0800, babbled like a
waterfall and said:

Hello

Our house has a steel framed, spiral (well, helical actually)
staircase. At four or five points (generally underneath the treads,
which can be removed) the frame has snapped.

My question is .... is this the sort of thing it is generally possible
to weld 'in place', or does it sound as if the stairs will have to be
dismantled, taken somewhere off-site, welded, then reinstalled?

The wooden stairs can be removed easily enough, leaving just the frame,
but the stairs are in the corner of the room, which is why I'm
suspecting the welding will have to take place elsewhere.

Any ideas?

I would be more worried as to why it snapped. It is obviously bearing
a greater load than it is made for/badly made.

I would consult the manufacturer and get their comments and
replacements from them

If welding is required this should be fine in situ but certainly
strengthening should also be undertaken.