What should lines crossing railroads be reinforced with?

Reinforcing lines that cross railroads with double arms and head guys is essential for ensuring safety and stability. The double arms provide added strength and support to the lines, reducing the risk of sagging or failure, particularly in areas where there may be significant tension or load. Additionally, the head guys help to secure the lines from above, maintaining proper tension and alignment. This combination is crucial in preventing potential hazards that can arise from unstable lines near active railroad tracks.

In contrast, the other options do not provide the same level of utility for crossing railroads. Triple supports and side guys focus more on lateral support rather than the specific needs of railway crossings. Single arms and footer supports may not offer sufficient reinforcement for the stresses involved when lines intersect with railroads. Double lines and cross beams are more applicable in structural supports than in line reinforcement specifically for crossing railroads. Thus, the use of double arms and head guys is the most effective method for ensuring that crossing lines remain secure and functional.