2.) After laying out the horizontal members, locate and drill two (2) 17/32 minimum diameter holes in the top horizontal. Locate each trolley hole at dimension "A" from the end and 1" from the inside face. See chart above for recommended dimension.
3.) With the top, intermediate and bottom horizontals properly fitted and spaced in the verticals, secure the grid at each of the four corners using one (1) #8 self-drilling, self-tapping fastener. The fastener should be located in the extruded pilot groove as shown Fig. 3
