Do you have any pictures or a sketch of the table and the parts? There are a few ways to arrange for fasteners. Basically, you need either a cleat or hardware that gets installed parallel to the top, mounted inside of the apron (if any), or supports. Across the grain, elongated holes for screws/washers to allow for movement. these can be snug but not tight. At the ends, the center can be screwed tight, but towards the sides, elongated holes for fasteners, done like the sides.Im building coffee table and wonder how I should secure the top? Allowing for movement, how tight do you tighten the screws ? How far apart?