I use 5 ft long shelving out of hosp carts that are stainless steel with the black plastic horses that have the little tabs that pull up on top which holds the trays on just fine.
Smokin Blues BBQ
The Pigman (Roger) Pitmaster
KCBS CBJ #30390
Lead for State of Ohio & Indiana for Operation BBQ Relief
Operation BBQ Relief Founding Member
Lang 84 Custom Longneck with warmer
Mobil Food Lic. With State of Ohio