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Author Topic: Tie Beams
Ken Hume
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Posts: 431
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Post Tie Beams
on: October 29, 2015, 08:18
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We are getting on towards the end of hewing the major principal components for the woodland barn cruck frame and so are now possibly selecting less than perfect logs from the log pile and bucking same (cutting to length) to produce an acceptable component.

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The top of the log can be used to make a very useable gate post or corner fence post.

The central portion of this 28 ft log has been marked and cut to produce a 17ft log that will be hewn to produce a slightly cranked tie beam.

The bottom of the log is spiral and so most likely will be cut up for firewood or blocking that will be needed for framing the cruck.

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The tie beam no 3 log was satisfactorily hewn on two sides and when turned for hewing the third side some bulges and overgrown areas were visible. The log will be hewn to reduce the visual impact of these imperfections and hopefully this will not reveal any major underlying defects.

Ken Hume OWG

Ken Hume
Administrator
Posts: 431
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Post Re: Tie Beams
on: November 1, 2015, 11:48
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After hewing the third side of tie beam no 3 it became obvious that the defect was fairly localised since it did not pass through the log to the third side.

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After hewing the fourth side it was possible to make a closer examination of the defect which confirmed that was most likely due to loss of bark by branch rub and subsequent healing by bark regrowth and resin infil of the gap between old and new wood. The knife edged Wetterlings long handled broad axe is proving useful when working round knots as this can be swung from two directions i.e. either up or down the log whereas the chisel edged Kent pattern axe can only be used in one direction (preferably down the log).

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Because the defect is on the top surface of the tie beam it will not be visible from below and also it will be in compression near the aris (corner) where bending stress is low and no joints will be cut into this area of the tie beam. The tie beam waney edges were cleaned using a draw knife to form a very useable beam.

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The finished beam looks good.

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With much use the Woodcraft Kent pattern hewing axe and Wetterlings long handled broad axe are now developing a nice mirror sheen on the blade edges and forged faces.

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Ken Hume

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