CS3.1  Double Shelf Support
Shelf thickness: 
Minimum: 4mm (5/32")
Maximum: 8mm (5/16")   

Cable spacing: 
Shelf width + 19mm (3/4")

CS3.2  Double Shelf Support
Shelf thickness: Minimum: 4mm (5/32")
Maximum: 10mm (5/8") 

Cable spacing: 
Shelf width + 19mm (3/4")