The Euclid Company of Ohio was a company specialized in heavy equipment for earthmoving

Earthworks (engineering)

Earthworks are engineering works created through the moving or processing of quantities of soil or unformed rock.- Civil engineering use :Typical earthworks include roads, railway beds, causeways, dams, levees, canals, and berms...

, namely dump truck

Dump truck

A dump truck is a truck used for transporting loose material for construction. A typical dump truck is equipped with a hydraulically operated open-box bed hinged at the rear, the front of which can be lifted up to allow the contents to be deposited on the ground behind the truck at the site of...

s and wheel tractor-scraper

Wheel tractor-scraper

In civil engineering, a wheel tractor-scraper is a piece of heavy equipment used for earthmoving.The rear part has a vertically moveable hopper with a sharp horizontal front edge. The hopper can be hydraulically lowered and raised. When the hopper is lowered, the front edge cuts into the soil or...

s, that operated from the United States of America from the 1920s to the 1950s, then it was purchased and converted into a section of General Motors

General Motors

General Motors Company , commonly known as GM, formerly incorporated as General Motors Corporation, is an American multinational automotive corporation headquartered in Detroit, Michigan and the world's second-largest automaker in 2010...

 and later on by Hitachi, Ltd.
The Euclid Company of Ohio specialised in off-road heavy haulers, specifically designed as off-road haulers - as compared to other companies, that modified OTR

OTR

Otr or OTR may refer to:* Ótr, a dwarf in Norse mythology* Otr, the abbreviation for the orchid genus Otaara* Coto 47 Airport , an airport that serves Coto 47, Costa RicaOTR may refer to:...

 truck

Truck

A truck or lorry is a motor vehicle designed to transport cargo. Trucks vary greatly in size, power, and configuration, with the smallest being mechanically similar to an automobile...

s for off-road earth-hauling.

The Euclid Crane and Hoist Co, owned by George A.