Turkey earthquake: UK team to assess building damage
Structural and civil engineers from the UK have travelled to Turkey to help to investigate the damage caused by last month's powerful earthquake.
Structural engineers from Turkey, who are working with the team, have already found some problems.
Samples of concrete taken from a collapsed building in Adiyaman have revealed that it contains 6cm-long stones. They have come from a nearby river and have been used to bulk out the concrete.
And steel bars inside the concrete, which should reinforce it, have been found to be smooth instead of ridged.