SafeStak shelving exceeds all national standards for whatever seismic zone your facility is in. All our shelving is fully modular and interchangeable, so you're never stuck with shelving that won't adapt to your needs. Each side of our standard and divider shelving comes in standard heights of 42" (3-shelf), 66" (5-shelf), 78" (6-shelf), 84" (7-shelf), and 90" (7-shelf), with a standard width of 36". Our peridoical shelving comes in the same standard heights, with a different number of shelves depending on which combination of shelves you choose. Custom shelving sizes are available upon request.