pylon

Metal beam that supports the electric conductors along the overhead transportation lines.

crossarm

Horizontal element that protrudes on each side of the pylon; it supports the bundles by means of suspension insulator strings.

suspension insulator string

Insulators that are assembled in a vertical or oblique chain; the overhead line conductors hang from it.

bundle

Conductor cables that are kept a constant distance apart by spacers; they are used to transport current.

K-frame

Part of the pylon that rests on the waist; it has two branches that end at the beam gantry.

node

Point at which several legs and bars come together.

panel

Part of the pylon between two horizontal members.

horizontal member

Horizontal bar that connects the main legs to strengthen them.

main leg

The main tower legs of the pylon body; they support mainly vertical weights.

base width

Space between the foundation axes of the main legs.

pylon foot

Lower part of the pylon that is usually underground; the legs are anchored to it.

pylon body

Part of the pylon support between the top and the foot.

diagonal

Diagonal bar that connects two main legs or a horizontal member and a main leg.

waist

Demarcation bar between the pylon top and body that is held tightly between them.

pylon window

Space bounded by the inner side of the arms of the K-frame and the beam gantry.

pylon top

Upper portion of the pylon where the insulator strings and bundles are attached.

ground-wire peak

Projection atop the pylon that supports the overhead ground wire.

overhead ground wire

Conductor that is connected to the ground and attached above the bundles of the overhead lines to protect them from lightning.

beam gantry

Horizontal element of the pylon top; it supports the bundles inside the pylon window.