A356 alloy sand cast aluminum, four bolt base. Bolt covers are provided.
All square standards include a peripherally reinforced
surface-mounted covered handhole centered 18"
above the bottom of the standard. The opening is
rectangular in shape with the major dimensions along
the vertical axis. The opening in the 4" square
standards is 2" x 4" and the 6" square standards is
2 1/2" x 4". A grounding lug is also provided.