Here's a posting with posts. These slanted vine anchor staves are at the Corcoran Vineyards near Waterford, VA. The vines are trained to go along horizontal wires which are strung from the posts. The posts themselves are anchored to the ground by other wires, reminding me of the physics problems I did in the previous decade which dealt with tension on wires and supporting cords.
The usual disclaimer: this drawing was done from a photograph. Colorization in watercolor will follow shortly. Drawing is done in technical pen using brown ink, about 10" x 8", September 13-14, 2011.