Computer tests have shown weak spots due to welding faults and there are problems with the concrete foundations.

BBC: NEWS | UK | England | London | Delay to raising Wembley's arch

The faint traces of concrete foundations in the earth are a poignant reminder of the town that has been lost.

ECONOMIST: Japan after the 3/11 disaster

Mr. Rana built Rana Plaza by draining water from a pond and filling it with concrete foundations, according to local residents.

WSJ: Local Officials Punished Over Building Collapse In Bangladesh

Mr. Rana constructed Rana Plaza in 2007, draining water from a pond and filling it with concrete foundations, according to local residents.

WSJ: Bangladesh Factory Lacked Building Permits, Officials Say

The second week of April is the first week since Christmas it has been warm enough to lay the concrete foundations to support the turbine.

BBC: Shropshire

The vast amount of rubble that once filled the city's streets has been cleared away and many unstable buildings have been leveled, leaving behind the concrete foundations on which to rebuild again in the future.

CNN: Witness to disaster: Six months on from Japan's tsunami

The first phase of construction includes early earthwork and concrete foundations for a mill and on-site power plant, expansion of the existing water-supply system, construction and operation of the initial phase of a new tailings facility, and expansion of camp facilities by approximately 6, 600 additional beds for workers.

FORBES: Kinross: Tasiast-Expansion Commitment To Hit $1 Billion By Year-End; Production Set For 2014

In a radical experiment which he called "building without foundations", he skipped the concrete substructure and instead built the guest wing on a pre-existing natural rock formation.

BBC: An Alvar Aalto tour of Finland