CRL SPS Overhead Track and Access Splices are 6063-T6 Alloy Aluminum, and are designed to accommodate the heavier loads required in stacking system installations. Two configurations, three lengths, and two finishes are carried in stock for immediate shipment. Lengths requiring cladding require 5 to 7 working days to fabricate. All lengths are pre-drilled at 24" (610 mm) on center for 3/8" (10 mm) fasteners. Contact our Technical Sales Department for additional information. Important Notes: STRUCTURAL DISCLAIMER - All customers who in any way utilize this product are solely responsible to consult a structural engineer to determine the suitability of the product for the intended use and site conditions. All installers must be qualified and have professional knowledge about compliance with local, state and federal regulations, safety factors, and the appropriate choice of fixing material and procedures.