Steam Bending the Laths

Why steam bend the laths?

The short answer is described visually here:

Hyperbolic Lattice Wall

If we don’t steam bend the laths the khanas will create a hyperbolic shape like above (where the sides are inverted)

Here is an example of another hyperboloid

Hyperboloid shaped basket at Askews cafe. Notice how all the lines are straight?

Hyperboloid shaped basket at Askews cafe. Notice how all the lines are straight?

Update july 10th 2015 – we are still into hyperboloids it seems. Jed found another way to illustrate the hyperboloid effect. See:

the straight line creates a “Waist”.http://i.imgur.com/sGOvKGT.gif

So to counter this effect in December 2012 we built a steam box and went to bending away.

http://www.youtube.com/watch?v=IWU7VuK2LH4

Here is a better day time view of the steam box we built.

Don't forget to refill the boiling water as it steams off!!

Don’t forget to refill the boiling water as it steams off!!

20 +/- minutess bathed in the steam seemed to be enough time when the fire is ripping.

20 +/- minutess bathed in the steam seemed to be enough time when the fire is ripping.

The steam bent laths resting in their jig built from scrap wood (thanks caleb!)

The steam bent laths resting in their jig built from scrap wood (thanks caleb!). Immediately after taking the hot laths out of the box, Jed found it best to prebend the laths over his knee before placing them in the jig. With this method the bend was more pronounced.

This is what steam bent laths looks like when assembled as a khanas.                                                                                                               See how the overall shape is not concave but bulges out a bit?

This is what steam bent laths looks like when assembled as a khana. See how the overall shape is not concave but bulges out a bit?

 Simply beautiful!

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One thought on “Steam Bending the Laths

  1. Pingback: Assembling the Lattice Wall Section | The Yurt Is Born

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