How giant oak beer barrels are made - GIF

Making giant oak barrels for Pilsner Urquell. Pitch-filled interior? Had no idea.

<video controls autoplay loop>
<source src="https://s3-us-west-1.amazonaws.com/hmt-forum/how_giant_oak_beer_barrels_are_made.mp4" type="video/mp4">
Your browser does not support the video tag.
</video>


Previously:

https://www.homemadetools.net/forum/...3286#post98587
https://www.homemadetools.net/forum/...5062#post81114
https://www.homemadetools.net/forum/...3095#post98045
https://www.homemadetools.net/forum/...286#post101209

gives a whole new meaning to cooperation of coopers

The biggest oak casks in the USA are just a few minutes up the road from me. They're quite a bit bigger than what I'm seeing here too.
http://2.bp.blogspot.com/-fjk_Z_KAfn...ak-barrels.jpg