Interlake Interack 30 Welded New Style Uprights with U-Punch are NO longer manufactured by Interlake Mecalux. Interlake Mecalux is now only manufacturing the Interack 30 Welded F-Punch Rounded Teardrop Upright Frames.
What is the compatibility of Interlake Interack-30 Old Style Teardrop uprights with F-Punch rounded teardrop shaped holes and New Style Uprights with U-Punch squared top shaped holes (Pictured)? New Interlake Mecalux teardrop beams are compatible with BOTH F-Punch uprights & U-Punch uprights. This is accomplished by using Interlake style end connectors with shaved lugs.
Beware, there are other suppliers of teardrop beams (and used beams on the market) that have a rounded lug on end connector that is only designed for rounded teardrop uprights and will not work with new style uprights. If you are buying used teardrop beams to fit into U-Punch New style uprights be sure to check lugs on end piece of beams and make sure it has a shaved (and not round) lug.