An Elevator test tower is a structure usually 100 to 140 metres tall that is designed to evaluate the stress and fatigue limits of specific elevator

Elevator

An elevator is a type of vertical transport equipment that efficiently moves people or goods between floors of a building, vessel or other structures...

 cars in a controlled environment. Tests are also carried out in the test tower to insure reliability and safety in current elevator designs and address any failures that may arise. Examples of an elevator test tower are the Express Lift Tower

Express Lift Tower

The National Lift Tower is a lift testing tower built by the Express Lift Company off the Weedon Road in Northampton, England...

 in Northampton

Northampton

Northampton is a large market town and local government district in the East Midlands region of England. Situated about north-west of London and around south-east of Birmingham, Northampton lies on the River Nene and is the county town of Northamptonshire. The demonym of Northampton is...

, England

England

England is a country that is part of the United Kingdom. It shares land borders with Scotland to the north and Wales to the west; the Irish Sea is to the north west, the Celtic Sea to the south west, with the North Sea to the east and the English Channel to the south separating it from continental...

, and the Shibayama Test Tower in Shibayama, Japan

Japan

Japan is an island nation in East Asia. Located in the Pacific Ocean, it lies to the east of the Sea of Japan, China, North Korea, South Korea and Russia, stretching from the Sea of Okhotsk in the north to the East China Sea and Taiwan in the south...

, which is also the world's tallest at 154 metres.