London Benchmark at new Shell Centre Posed Some Corrosion Problems

IMMEDIATELY under London the ground is in a state of permanent—if diminutive—motion. In general it is settling down so that the buildings upon it are sinking lower and lower. Subservient to excess wet or dryness, this sinking motion is irregular and varies in adjacent places. The movement of buildings, depending largely upon the type of foundation used and their total weight varies as well. These facts present a number of problems to both architect and surveyor, especially when planning and preparing for the massive buildings of today.