Case studies

Lincoln Cathedral - Derlyton Tower - Ivy Conduit - White Rock Hastings - Willingford Bridge - Somerhill Bridge

based on DHD structural's expertise, we areable to provide effective repair solutions for properties where masonry has effectively spalled, cracked or failed.

Using our considerable experience and expertise, D H D Structural Ltd has successfully undertaken structural stabilisation projects of all sizes and complexity on a comprehensive range of structures from Victorian terraces and modern tower blocks to castles, and bridges listed below are a few of our more recent projects.

By combining the latest technology with considerable experience and expertise, the company’s skilled personnel are able to supply an efficient, reliable and modern contracting service throughout the UK. Our clients include home owners, English Heritage, many Main Contractors and Local Authorities.

THE DEANS EYE WINDOW LINCOLN CATHEDRAL

The Dean’s Eye Window sits in the North Transept gable of Lincoln Cathedral. This 13th century circular plate tracery window, is the subject of an ongoing £4 million restoration scheme. The window was surveyed and found not to be perfectly round, with some distortions having occurred due to various loads over many years. In addition to this, the front face of the window had twisted within the gable itself, meaning that the new window would need to be fixed slightly angled within the existing gable wall.

We were asked to install the anchor system, which was specifically designed to hold the new tracery stones. Before any stones could be positioned, working at ground level, we had to cross-stitch each stone to allow for the further drilling and later installation of 2no. 1.8m long Cintec anchors per stone.

The success of the whole project depended on the precision core drilling and extreme accuracy employed by our skilled personnel, as each anchor had to cross in the middle of each stone, with a distance of only 5mm between each anchor. Then, when each stone took its place in the window, all drilling had to take place between a gap of 250mm in the closure stones.

2no Cintec anchors defying gravity holding in place 1 stone approx. 150kgs 120ft in the air, part of the New Deans Eye Window at Lincoln Cathedral.

Please click below for other projects in PDF format

Derlynton Tower The Great Hospital

Ivy Conduit Holy Cross upon thames

White Rock Cliff Stabilisation Hastings

Somerhill School Bridge Kent

Willingford Bridge Arch Stabilisation