Aluminum, Not Steel.
Every eme structural extrusion is 6061-T6 aluminum. That's not a finish choice — it's why a 22,000 lb eme gantry can weigh roughly 1,030 lb while comparable steel gantries can weigh several times more, why a small crew can assemble it on the ground, and why a maintenance shop can store it in the same footprint as a pallet rack. The weight comes off the operator, not the rated capacity.