From Swine Equipment
Construction & Specifications for Standard Nursery Pen: Legs constructed of 2' x 2' x 3/16' Angle with side panel and end panel brackets and floor rack bracket (can be built to any height on order). Side and End Panels are constructed of 3/8' x 1' Flat Bar at top and bottom with 5/16' Rod welded vertically on 2' centers. Bottom Rack made of 1/4' x 1-1/2' Flat Bar turned on edge for strength. Requires no bolts to fasten to legs. Built to accommodate woven wire, Filter-Eeze® vinyl, or Tenderfoot NS® coated flooring.
Construction & Specifications for Heavy Duty Nursery Pen: Legs and Floor Rack are same as above. Side and End Panels are constructed 7/8' Round Solid Bar at top and bottom with 7/16' Rods welded vertically on 2-1/2' centers.