We pre-cut Douglas Fir Timber Parts for this concrete bridge re and re on the curbs. These bridges have pre-installed rods sticking out of the sides embedded in cement. We precut the bottom risers to attach to the bridge and then the top risers to attach on top. The timber curbs (12″ x 12″) were pre-cut to exact lengths so the install would go well on site. The project went smooth! Pre drilling really helped the crew.