5.0 INSTRUCTIONS
5.1 Materials
5.1.1 Tubes, units & frame, etc. shall be straight to the eye and shall be free of cracks, splits, excessive corrosion or other defects. The ends shall be cut square with the axis of the tube. Any tube, unit or frame requiring a high degree of maintenance such as wire brushing or scraping shall be replaced. No tube, unit or frame will be painted. The only acceptable coating will be galvanizing and zinc primer. No black steel tube shall be used.