How should all 90-degree corners in line construction be supported?

In line construction, 90-degree corners require additional support to ensure structural integrity and stability, which is why using guy wires is the correct approach. Guy wires provide lateral support, preventing the line from swaying or collapsing due to wind or tension from the wires. This is particularly important at corners where directional changes can create stress and instability in the line structure.

Utilizing guy wires effectively distributes the loads and helps maintain the position of the corner support, ensuring that the overall construction remains safe and functional. Additionally, they contribute to the longevity of the installation by reducing wear and tear on the corners specifically designed to handle substantial tension and external forces.

The other methods of support mentioned—such as claiming no additional support, using less tension, or being freestanding—would not adequately address the unique stresses present at corners, which can lead to structural failure if not properly secured. Thus, guy wires are essential for maintaining stability in 90-degree corners during line construction.