We say we never do the same project twice. In this project we didn't even do the same beam twice!
The roof beams for this amphitheatre in New Hampshire all have variable bevels. Roof purlins are typically beveled on top in order for the purlin to sit plumb and support sloped decking. The roof slope changes in this roof, so the beveled cuts need to vary - visually twisting along the purlin length.
In this photo, if you follow the top and bottom left edges of the beam you can see the variation along this header beam. It is nearly flat at the near and far ends, while steep in the middle.
In this stack of finished purlins, you can see the different angles at each end. The top and bottom of the purlins were beveled on this project.
Here you can see all of the glulam framing assembled!
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