In the center of the vessel is a single mast with a tripod base.

Then Nylan's legs collapsed as he slid to the packed clay beside the tripod base of the laser.

The weapons were mounted on the same type of tripod base which Roman engineers used for cranes and hoists.

It consists of a bowl with a cover, standing on a tripod base.

Folded, it becomes a slender column on a tripod base.

On Wednesday it was removed and workers are now tackling the huge tripod base.

Its round top is centered on a tripod base of a turned shaft and tapered spider legs.

The 30-foot sculpture is supported by its static tripod base with a 14- to 15-foot diameter.

In recent times times tripod bases of fabricated steel have become popular with some smiths.

Some sources say the Unisphere weighs 900,000 pounds, a figure which includes the additional weight of its 100-ton inverted tripod base.