What type of braces should not be used when supporting unguyed corner loads?

Log braces should not be used when supporting unguyed corner loads because they typically lack the necessary structural integrity and stability needed for such applications. Log braces, which are designed primarily for use in specific applications that do not require the same level of support, can fail under the stress and load associated with unguyed corners. This is particularly important in the context of telecommunications infrastructure where maintaining the integrity of support structures is crucial to prevent sagging or collapse, which could endanger both the equipment and personnel.

In contrast, plank ground braces and side guys are specifically designed to provide effective support and stabilization for corner loads. Plank ground braces are used to distribute loads more evenly and create a stable base at the ground level, while side guys provide additional anchoring to resist lateral forces. Therefore, the preference for using these other forms of support over log braces in situations involving unguyed corner loads is essential for safety and structural reliability.