Steel section sizes, dimensions and properties
Typical pre-1976 steel building systems used in New Zealand
A good summary of the use of iron and steel in structures from 1780 to the present day is given in (Bussell, 1997). For a New Zealand context the relevant period is from 1900. Existing New Zealand building with ferrous material will mostly be steel. This was the preferred material for structural members in buildings from 1880 onwards. The exception is columns, especially gravity columns functioning as vertical props for the floor. Cast iron was used for these through to just after 1900 and cast iron columns are found in some of the oldest New Zealand buildings (NZSEE, 2006). They are typically “chunky” with thick sections, often ornate or complex profile fluted or plain hollow circular or cruciform columns. Their surface is typically pitted with small blowholes…..(full article available here).