The series of alloys used is sensational: weathering steel for aging, marine-grade aluminum for weight cost savings
https://knoxznxp391.wpsuo.com/designing-for-2126-custom-snow-guards-in-copper-that-prove-their-worth-over-time
The variety of alloys utilized is sensational: weathering steel for aging, marine-grade light weight aluminum for weight financial savings, and duplex stainless for rust resistance in harsh environments.