Rainbows in the Lehigh Valley Gorge

[BR60103]

One thing I did with my duckunders was cover the sticks underneath with foam. I used the foam insulation for plumbing pipes -- the kind with a slit along it (and maybe tape).
This sometimes could be opened up enough to go over a 1" wide board or might have to be cut apart. This keeps the sharp corners from doing as much damage to your head (or your guests' heads).
Too bad the hole inside is round.