Showing posts with label anticlastic. Show all posts
Showing posts with label anticlastic. Show all posts

Thursday, May 08, 2008

Hollow Branch Forms in Steel

A few entries back, I posted about some tree shelf brackets that I've been working on.  Here's how they turned out! 
Tree Shelf Brackets


Tree shelf brackets
I used a U shaped beam at the top.  The shelf should be routed to fit over the u shape, so that it looks like the tree is going right up into the shelf. 


The shelf brackets are large, about 30 inches high with a shelf support length of 12 inches.  Surprisingly enough, they are not very heavy.  I specifically designed them to be strong, but also to be lightweight.


Let me back up a little.  When the client first approached me about the project, I sure "sure!" jumping in headfirst like I usually do, without thinking about it enough.  I originally thought I would use branch textured bar stock.  Then I realized a few things.



  1. I don't have a power hammer anymore, so it would be terribly difficult to for me to texture my own bar stock like I used to. 
  2. Those would be heavy!  I'm trying to avoid heavy.
  3. Propane is very expensive right now, so that means hot forging is very expensive for me.  I've been adapting my work to use much less propane.

So I started to re-think the process.  At first I thought I would use plain un-textured bar stock.  Still that would use lots of propane for forging and would be heavy.  Then I thought, well I'll just buy the bar stock.  That was a mistake.  That supposedly "branch textured" bar stock from King Metals is UGLY and doesn't look at all like a branch.  Finally I realized, I need to go back to the rough anticlastic technique that I've used in the past to make hollow twig/branch forms, in both large and small sizes.  I used to use it a lot for steel work, but I only have the pictures as slides, with no slide-scanner.  If you look back through my jewelry pages on flickr, you can see the technique on the twiggy copper bracelets and on many of my leaf stem pendant bails.


Basically, I cut asymmetrical long strips of metal.  Then I shape them over the step of my anvil into a tube shape.  To finish up, I close up the tube, letting the metal overlap and wrinkle at the edges.   I also hammer around the hollow tube form, to create more texture and form.  This creates a surprisingly strong and lightweight hollow form, that is very organic and convincing as a branch form.


I agonized over this for ages before I started!  I hadn't done it large scale in so long and I was worried that it might not work after all the effort I put into it.  But as you can see from the pictures above, it worked beautifully!


I was so pleased after I finished the brackets, that I even created a few small steel branch sculptures, and a candleholder, using the same technique.  Click on each photo for full details.
Handforged Oak and Acorn Branch

Wrought Iron Oak Bough

Wrought Iron Grapevine Candleholder


All in all, it's turned out to be a great example of how a challenging project can lead to exciting new directions, or exciting new takes on old directions.