Galvanized Steel Rsj Poles, Thickness : 9 Mm, Packaging Type : Gray

RSJ poles typically refer to "Rolled Steel Joists" (RSJs) in construction. They are structural steel beams used to support loads, commonly seen in buildings, bridges, and other heavy-duty structures. While RSJ is often associated with beams, it's possible that you're referring to RSJ-style poles used in certain applications, such as for utility poles or specialized support structures.