Lineman safety, loading and or unloading poles, from pole piles is our primary concern. Best industry practices indicate, when loading the CMS Portable Pole Rack System, the safest and most stable pole piles are stacked only three layers deep. Poles should be stacked tip to butt on the racking system. The quantities of poles shown below each of our standard Pole Racks are the approximate number of poles that can be stored on the CMS Portable Pole Rack System three layers deep.