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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 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.