The standard T-nut layout for years has been the 72 T-nut pattern. 72 T-nuts is how many T-nuts you will install on a 4' x 8' sheet of 3/4" ACX plywood. You would choose this pattern if you are building a school wall or a trampoline park. There are limitations with the 72 pattern as the vertical space between t-nuts is 16" apart in a straight line. That can leave a lot of open space between holds. If you want to set routes and boulder problems, scroll down to the 128-pattern.
Atomik recommends the 128-hole T-nut pattern (Staggered). It gives you T-nuts that are 6" apart, with each column of T-nuts staggering. Our reasoning for this density is that space is at a premium on a home bouldering wall since most are not very big. When route setting on the standard 72-pattern, you will find significant space gaps between holds. It is easier to set routes on the 128 T-nut patterns because you have more options regarding the staggering locations and the higher quantity of T-nuts—the Atomik standard for bouldering walls to achieve maximum options for route setting.
Please note that standard framing of 16"-on-center will not work for this layout; the vertical row of t-nuts at 32" will be blocked by the stud. Framing this wall at 12"-on-center instead adds just one extra stud to the wall and will work with all of the t-nuts.
128-t-nut System Walls use a 6" grid pattern. System walls need to be symmetrical with a tight T-nut spacing for most options to overlap paths. This 128 T-nut grid pattern makes setting up repeating holds/moves easy.
The 256 pattern is the pattern we are using for our 22-panel wall here at Atomik. It gives us the most amount of staggered T-nuts possible per panel which gives us the most options to set five-star quality boulder problems. The layout is directional so that when you stack panels on top or side by side, the spacing is consistent between the panels.
Here is an example of a finished 256 T-nut Layout wood wall: