Here you can see the longitudinal cut. These make for easy layout work as you can hook the groove with the end of a tape measure or set a carpenters square right in the groove. Another thing I like about the melamine is it is washable. Doing layout work with a pencil is easily visible AND when it comes time to change or work on another project it washes right off. back to a clean top (or slate if you will...)
Here is the main table being used to build the chassis for my Astro van. I laid out the lower rail positions then drilled holes in the top for the u-bolts. Once these were tightened up the lower rails were solid to the table and very easy to build too.
The table was more then strong enough to set the mock-up engine and trans in place to build motor mounts. Didn't complain one time.
Thanks for looking