anyone know why they put a pine tree at the top of a metal structure...

[iam4u2nv]

They are building an addition to a building I pass everyday and they just finished the metal structure. They put a pine tree at the top of it. My co-worker told me they always do that with a metal structure but he did not know why. Anyone here know?

 

[klah]

http://www.aisc.org/Content/ContentGroups/Modern_Steel_Construction3/December_2000/0012_05_christmas.pdf

Check out the caption for the photo on the 2nd page.

 

[MichaelD]

That was a very informative post, Klah. Thanks.