The series of alloys made use of is spectacular: weathering steel for aging, marine-grade light weight aluminum for weight savings
https://franciscoaocu941.theglensecret.com/snow-guard-truths-copper-s-unequaled-longevity-in-alpine-and-coastal-projects
The range of alloys used is stunning: weathering steel for aging, marine-grade light weight aluminum for weight financial savings, and duplex stainless for deterioration resistance in harsh environments.