The mean depth of water in which part of the building is located varies from zero at low tide to a maximum of about 4.5m at high tide. However, the waves can be much higher and spray could possibly envelop the buildings. The height of the waves is determined by many factors including the offshore wave conditions, the mean depth of the water, the form of the seabed and coastline and the relationship of the gallery building to the stone pier.

It is not possible to carry out calculations that can reasonably predict the effects and inter-relationships of all these variables. Hence, the decision to construct a physical scaled model of the building, the pier, the seabed and coastline in a wave generating test tank at HR Wallingford.

The first of the tests underway will identify key 'pressure points' on both elements of the building.

By placing the sensors at those points, HR Wallingford are able to take measurements that can be computer analysed to determine the true forces at play on the building. A variety of wave conditions, through to the most extreme, will be tested. Sea level predictions will be included in the simulation of conditions.

The 3D modelling exercise will give the designers greater confidence as it informs their detailed structural design.

Tests will also be undertaken to ensure that access to the Turner Centre is possible in all weather and sea conditions. The tests will investigate concerns for possible 'overtopping' as waves impact on the stone pier in severe weather. HR Wallingford will also study the possible effects of scouring to the foundations of both the gallery building and the stone pier building. To obtain an understanding of these effects, dyes and particles will be put into the test tank and their movements filmed both with and without the Turner Centre model in place.

MJ Information No: 18924