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dean's eye window

Deans Eye Window

Project: the dean's eye window
Masonry Contractor: The Cathedral Works Department, Dean & Chapter of Lincoln Cathedral
Architect: Buttress Fuller Alsop Williams

Stewart Design were appointed to carry out the setting out of the intricate tracery to this 13th Century circular plate tracery window, which is being completely replaced within the gable wall, utilising 3d photogrammetry technology. The window sits high in the north wall of the North West Transept to the Cathedral.

This project was made all the more callenging by the fact the window is not a perfect circle, distorted up to 200mm in places, the distortions having occurred due to the various loads over the many years. The wall is also twisted (i.e. out of square) on the plane of the front face within the gable itself.

he new window is to be manufactured flat, but fixed slightly angled within the wall in order to fit within the existing gable wall profile. Stewart Design developed the digital photogrammetry information supplied by Photarc Ltd to produce the setting out drawings and all the templates. The fixing of the stone window into the gable end is now nearly complete. The fixing of the glazing will now take place, with the whole project due for completion in mid-2006.

Architecturally the plans and intent for the building to complete the original design by Sir Reginald Bloomfield had been approved, however the detailing, scheduling and production of working drawings required a design company with the experience of age old masonry techniques and the ability to fuse them with modern methods of construction, whilst appreciating the increasing demand on shorter programmes and financial viability.

Stewart Design (UK) Ltd were engaged by Marlborough Brickwork to carry out this role on what is now an award winning scheme. As part of the package Marlborough installed 250m3 of Portland Stone in varying unit shapes and sizes from 200-1400kg. An innovative 'mono-rail' system was used to transfer these units to their positions on the 5th & 6th floor fašade.