BLOG-9 STEEL IN ARCHITECTURE
STEEL IN ARCHITECTURE
Steel is being used as a building material since 17th century
1780 -1840 - cast iron
1840-1890 - wrought iron
1870-1920 - intro to carbon steel
1920- to date steel has become the third most popular material after concrete and timber
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEikfX34L4_S2m35cnbSKTHPNxDTWuMq9jSqO1L0pME37YxHVddCrT0-wj6sUwfBKoKI-HfvYWr_2boDX9bmN9E9A0Tyz4T0fK6A48HZJXz_PccFctI4QYSy-apMFvoQKNWMs-BpSiFpN8S6/s640/13.jpg)
-MUHAMMAD
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