What are these called?

[Forest2Furniture]

The general idea is to take them out before they go through the saw otherwise you'll have a knackered blade!

[dumper]

2 hours ago, Forest2Furniture said:

The general idea is to take them out before they go through the saw otherwise you'll have a knackered blade!

wow ! I never realised that I’ve been cutting timber for 45 years now I know where I’ve been going wrong
So how do you remove them the picture show them driven fully into the log 

[Deafhead]

3 hours ago, dumper said:

So what happens when the log goes through the saw how do you get them out?

With the saw blade, same as nails, barbed wire and anything else you haven't spotted

[se7enthdevil]

the ones i've seen are just a steel corrugation and only go in 1" to the end of a sawn board to stop it splitting during the kilning or air drying process and the end is usually cut off before you do anything.

 

i have sawn through one though and TCT blades go through them with ease...

[openspaceman]

1 hour ago, se7enthdevil said:

the ones i've seen are just a steel corrugation and only go in 1" to the end of a sawn board to stop it splitting during the kilning or air drying process and the end is usually cut off before you do anything.

 

i have sawn through one though and TCT blades go through them with ease...

Corrugated Fasteners 6x1 SC - fixings - corrugated fasteners - Corrugated Fasteners 6x1 Sc - Timber, Tool and Hardware Merchants established in 1933

WWW.SWANSEATIMBER.CO.UK

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Corrugated Fasteners 6 X1 Steel - Timber, Tool and Hardware Merchants Established in 1933. Specialising in Ironmongery...

I used to see these a lot  joining corners of boxes, they seem to have fallen out of fashion now, I hadn't thought of using then to prevent splitting. I had assumed the ones in the original post were hard plastic, like the timber tag shown, but never seen them either.

 

Interesting idea but wouldn't thy just move the stress crack elsewhere? Mind we do weight wood while seasoning to control movement...

 

[Forest2Furniture]

7 hours ago, dumper said:

wow ! I never realised that I’ve been cutting timber for 45 years now I know where I’ve been going wrong
So how do you remove them the picture show them driven fully into the log 

Everyday is a school day.

The ones I've seen haven't been hammered below the surface