I have the messurements...
The best option is to use the current hatch boards for a reference. If they are not available, see attached picture with dimensions. There are 2 hatch boards. They fit together at a 45 degree joint. Width across the top - 22 3/8" Width across the bottom of the upper section - 21 1/16" Width across 3" up from the bottom - 19 7/8" Length of top board - 13 5/8" Total length - 27" Estimated radius of curve of bottom corners - 3" Thickness - 9/16" (I think 5/8" will fit in tack)
