11 Diagonal Street
Multi use, Office in Johannesburg, South Africa
From Wikipedia, the free encyclopedia
11 Diagonal Street (also known as the diamond building)[2] is an iconic office tower in downtown Johannesburg, South Africa, that was built by Anglo American Property Services.[3] The 22 floor building is the 15th tallest in the city.[4]
| 11 Diagonal Street | |
|---|---|
A view of the building from street level | |
 Interactive map of the 11 Diagonal Street area | |
| General information | |
| Status | Completed |
| Type | Multi use, Office |
| Location | Johannesburg, South Africa |
| Coordinates | 26°12′15″S 28°2′9″E |
| Construction started | 1981 |
| Completed | 1983 |
| Opening | 1984 |
| Cost | R65 million |
| Owner | Rebosis Property Fund [1] |
| Height | |
| Antenna spire | 80 m (260 ft) |
| Roof | 75 m (246 ft) |
| Top floor | 75 m (246 ft) |
| Technical details | |
| Floor count | 20 |
| Floor area | 20,000 m2 (220,000 sq ft) |
| Lifts/elevators | 6 |
| Design and construction | |
| Architect | Helmut Jahn |
The building's architect was Helmut Jahn.[5] It was conceptualized in 1981 and excavations began in December that year. Construction ended in 1983 and the building was tenanted in 1984.[6] The building is designed to look like a diamond as it reflects different views of the Central Business District from each angle of the building.[7] Apart from its unique exterior, the structure was built with concrete instead of steel, demonstrating that concrete could be used instead of steel in both speed and cost.[8]
The building is shown on the album cover for The Very Best of Level 42.
