Use our Online Calculator to calculate the theoretical weight of your steel parts according to product type and dimensions: round, square and round tubes, square flat plates, hexagons. Or Data source: "GB/T 3094-2012 Cold Drawn Special Shaped Steel Pipe". For aluminum L-brackets, a common weight. ltaic bracket is also called solar photovoltaic bracket. Solar photovoltaic bracket is a special bracket designed for placing, installing and fixing solar anels in the solar photovoltaic power generation system. It is an essential component of any solar power system,as it provides the structural support needed to ensure the panels are installed correctly and can withstand re o lar panels on tile roof surfaces. Climatic Conditions: Environmental factors such as wind, snow, and seismic.