Brownie towers are designed and approved specifically for your application with round members because they are stronger and create less wind load than angle iron members. If a tower made of angle iron is the same weight as a Brownie tower, then it is NOT of equal strength.
Brownie is also well-respected throughout the industry for its ease of construction. Precision engineering ensures that pieces fit perfectly and bolt holes line up.
Brownie systems are designed to ship efficiently and install quickly and cost-effectively.