The lumber industry uses the “Janka hardness test” to test and rate common woods for hardness. The test involves pressing a steel ball to gauge how much pressure each wood species takes to push the ball half way into the wood. You can download my free PDF of the Janka chart here. {If you can’t open a PDF then install the free Adobe PDF Reader here.}
The final building step is to lay each plank in place. These will be cut to 20” long each. Attach each piece using wood glue and brad nails. Just make sure the length the nails isn’t longer than the width of the planks and plywood combined. Once you have finished that, you can paint or stain and add your hardware!  Because I was using pre-finished white barn wood from Porter Barn Wood, I painted the table before adding the planks.  Check out these planks….