Wood expansion

Tricky Dicky · 2018-05-07T19:31:20+00:00

I have just installed a 1.4m X 150mm X 50mm spruce beam between the garage and house. At present it is a good interference fit but I am a little worri ed when it gets saturated it might expand and put pressure on the brickwork . Is there any place I might find the information? I also need to attach a 100mm X 100mm gate post to the brickwork, I intend to use some shield fittings with projecting bolts, the drill size being 20m m diam. With the bricks having frogs which in the past I have found not ful ly filled with mortar, I was wondering if I would be better aiming my holes in the mortar lines rather than the centre of the bricks. Any advise welco me. Richard

May 07, 2018 22 Replies

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The Natural Philosopher 8 years ago

You are right. The tangential and radial rates should be swapped.

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TimW 8 years ago

Exactly. And no bit of wood expands/shrinks 1% along the grain, ever. TW

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The Natural Philosopher 8 years ago

When I get back into my house, I will take a photograph that shows it

Green wood to 'house dried' over 12 years shows well over 1%

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