Dimensions:
16" x 16-3/4" x 44" long
Wood:
1X8 x 6' long board #1 grade redwood (Knot-Free) Board
If you don't mind the look of knots, use a lower cost #2 grade lumber.
Saw:
Table saw and band saw
Parts:
3/8" dia. Wooden Plugs (#PLG375)
Sealer (Optional): High-grade, non-yellowing, semi-gloss UV protected project sealer for outdoor protection (#POLYQT).