[TheForge] spirialstairs

Fri Jan 24 12:33:01 2003

This response is off the cuff, and untainted by any real knowledge of or =
experience in the matter :^)

I'm reminded by this discussion of Francis Whittaker's Blacksmith =
Cookbook, in which he relates the trick to bending an angle iron.  First =
you bend it 1/3 as much the wrong way, then bend it the right way.  =
(Admittedly, that's incomplete info.  See the book for exact instructions.)=

Two points come to mind here.  A trick like Whittaker's MIGHT work for =
spiral railing.

Then again it might not for a reason not obvious.  Namely, the WAY a piece =
of iron bends depends upon its shape.  Grab a square bar by the ends and =
bend it and it bends ON THE DIAGONAL.  I know just enough about this to =
make a complete bollux of any explaination, so I won't explain.  Anyway, =
such a phenomenon might also occur with a railing of arbitrary cross-sectio=
n.

So, my final thought is that maybe the twist could be done first, then the =
curve could be put in afterwards. =20

Bruce
NJ

>>> [email protected] 01/24/03 09:30AM >>>
A long handle wrench and a vice stand is the way I have doing it for a=20
flat helix,
If there is a better way I also would like to know...
Mike Wolfe

R.C.Mundt wrote:

>The rail for a curved stairway has a twist in it as wellas a curve.
>Do any of you have any good ideas for doing this twist?
>I've done several of these, the curve is easy, make a pattern from the =
stairs or lay out the curve on the shop floor and bend the iron to it.
>The twisting is where I always have trouble.  I go to war w/ big wrenches =
etc. and fight for hours to get it right.
>Randy Mundt
>
>
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