Arched Bridge – Day Two

Our task for Day Two was to complete the two structural beams of the arched bridge, so we simply continued building up the glued-and-screwed laminations until each of the curved beams got to the full 10-inch depth I wanted.

After that I affixed the cross-ribs to tie the two beams together.  The end result was something with near-zero vertical deflection under load, but a little too much lateral wiggle for my taste.  I solved that in the very end, but for now the structure was done.

Before laying on the decking I painted everything I could reach with polyurinate paint, which is actually the appropriate application for this product.