Digging up the past

Digging up the past - 1989 - Construction News (6112) 18 May 1989, 20(1) .

Focuses on building techniques uncovered by archaeologists at a redevelopment site in the City of London ; a Roman public bath-house under a 1960s office block. Describes the Romans` use of raised floors for the distribution of heat, roof tiles, bridging tiles and clay drainage pipes.