A seminar organised by the Kochi chapter of Indian Geotechnical Society here discussed different aspects concerning piling for construction of buildings. The piling method should be suited to the nature of the soil, said S.R.Gandhi, Head, Civil Engineering, IIT, Madras. The cracks that occur in buildings due to piling operations in the neighbourhood could be traced through studies and simple solutions could be found out, he said. About 100 civil engineers took part in the programme, a press release said.