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Islamic Architecture
 
mosque columns-structural connections
Many columns have bronze girdles at the base-to- plinth connection and at the capital-to-impost connection. My theory is that it reduces the moment in an earthquake event. Is this correct? Were they installed during the assembly of the column or wrapped later?
Also were the wrought iron tie bars at the column capitals usually installed at time of construction or added later?
Stephen Waite
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mosque columns-structural connections
Stephen, This phenomena applies to European architecture as well, so I too, am interested in answer posts.
Frank John Snelling
mosque columns-structural connections
Frank,
My interest is in the seismic region of Turkey and buildings from the 5th C to 17th C. I don't remember seeing these on the continent. Do you recall where and the construction dates?
Thank you.
Stephen Waite
mosque columns-structural connections
Stephen, I assume you mean Continental Europe when you say "continent"? Please remember that Britain is an island culture and quite separate from the cultures in Continental Europe.

Offhand, I cannot direct you to any one building, but I have noted iron ties and straps on pre-industrial buildings in Spain and Italy.
Frank John Snelling
mosque columns-structural connections
dear, the greeks poured metal in central hole in columns. in french, the parts of columns are called tambour; and every tambour had a vertical hole in its center. and between eact tqo superimposed tambour the greeks poured tare.
Magyda Cherradi
mosque columns-structural connections
Magyda, I have never heard of metal being poured into the centre of a stone column. To me this sounds like the ancient Greek and Roman practice of joining two stones together with iron staples which were set in place by pouring lead into small holes.
Frank John Snelling
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