I have finished what will be my goban but i need a little help placing the grid the board dimensions are 17 15/16 in long by 16 11/16 in wide so i just need help placing the border of the grid.

_________________
Ordo ab Chao
Semper Fidelis
The question is why, the answer: why not?

Well, your aim is to be able to fit (almost flush) 19 stones on in each direction. The lines go in the middle of the stones. So, personally, I would divide the length of my board by 19, and call the result x; then I would mark 0.5x, 1.5x, 2.5x, ..., 18.5x across the board. (Each line will end up a distance of x from its neighbours, and the lines at the edge will be a distance of 0.5x from the edge of the wood.) The same in the other direction (your board is rectangular, so x changes, of course!). Then I'd join it up into a grid. You can test out the process on a piece of paper first - it doesn't matter if the size is different.

http://senseis.xmp.net/?EquipmentDimensions has all the details you need, I think?