Glue post?

[cpalm]

The problem is that there is heartwood in such and it can start to twist, as well as crack.

Yes, a post with heartwood is almost guaranteed to crack. Not that it directly matters, other than cosmetically, though.

 

[fribygg]

ok
have the materials and machines

Do you have knot-free spruce in larger dimensions?

 

[jonaserik]

My post is a bit different. Just put together with gluing. The one with the rings doesn't become a happy or sad face. It has 2 visible sides and they don't matter. It's best if they're interwoven with the rings. Wood negates itself then, in case there's a tendency to twist. You can place it as you like. Pine is good enough if it's under a roof. Spruce is a bit finer-grained and more like outer paneling. Then you can varnish with clear varnish, maybe not so great if the sun can shine on the post. Varnish cracks, but a clear stain works well. Just remember, weather and wind can change the post's color after maybe a year. It darkens, especially where the sun can reach. It's also possible to make a post that's hollow, but a bit trickier to glue together without screwing.

EDIT What will the post support?

 

[ante.b]

My post is a bit different. Just put it together during gluing. The one with the rings doesn't become a happy or sad face. It has 2 visible sides and doesn't matter. It's best if they are staggered with the rings. The wood counteracts itself then, if there's a tendency to twist. You can lay it as you want. Pine is good enough if it's under a roof. Spruce is a bit finer-grained and more for outer paneling. Then you can varnish with clear varnish, maybe not so good if the sun can shine on the post. Varnish crackles, but a clear stain works well. Just keep in mind, weather and wind can cause the post to change color after maybe a year. It darkens, especially where the sun hits. It's also possible to make a hollow post. But a bit trickier to glue together without screwing.

EDIT What is the post supposed to support?

patio roof
not all growth rings in the same direction?

 

[jonaserik]

altantak
not all growth rings in the same direction?

No matter, because it's 4 pieces being glued, so you can't make them one way or another. Just put together when gluing. What can be good is to reverse the top and bottom sides. (the ends are rotated 180 degrees on 2 of them) Then the long fibers will be somewhat resistant to each other. Do you follow?

 

[ante.b]

yes