Historic Churches 2018

BCD SPECIAL REPORT ON HISTORIC CHURCHES 25 TH ANNUAL EDITION 27 always be hidden in service ducts and never used for visible final circuit cabling. With all cable types, the method of surface fixing should be considered in respect of the surface as well as the cable type. Normally, ‘P’ clips will occupy less space than saddles and require only one rather than two fixings. However, where multiple cables are to run parallel to each other, a bespoke saddle may be a better solution. For SWA cables the normal cleats are excessively bulky and alternative strapping or saddles will have less visual impact. Conventional containment such as trunking, cable tray and cable basket may be appropriate in unseen service ducts and roof voids, but is rarely acceptable if in view. Bespoke containment fabricated with timber cladding or decorative mouldings is often an excellent way of disguising cable runs where standard metal trunking would not be acceptable. All cabling systems should be designed to avoid vulnerability to damage by rodents or other wildlife so any PVC cabling, including final circuit wiring, should be in suitable containment. The risks to all cabling in roof voids, panelled walls and ceilings, or floor ducts should be fully assessed when the system is designed. RECORD DRAWINGS While a project may not have started off with a good set of record drawings, today’s standards and codes of practice require that every effort should be made to provide a thorough set of O&Ms. This is not only to provide every assistance to good maintenance in the future but is an important part of a building’s Health and Safety File. THE ULTIMATE GOAL Working in historic buildings is both challenging and stimulating. Since no two problems are quite the same, the solutions are rarely identical. Finding the right approach for each scenario can be difficult, especially when a project needs to satisfy multiple stakeholders, many with different agendas. The ultimate goal is to allow historic buildings to remain relevant and vibrant by implementing appropriate and reversible technical solutions which enhance their use. In effect, to achieve a thoroughly modern installation that is totally in harmony in a historic space. BRUCE KIRK is the principal of Light Perceptions Limited, an independent lighting design practice specialising in works in historic buildings. He is a member of the technical panel of the Cathedrals Fabric Commission for England, an advisor to three DACs and a member of the Westminster HCC. The nave altar at Lichfield Cathedral, lit by pendants in the arcades and high level spotlighting from within the triforium. The pulpit and screen (by Scott and Skidmore) can be seen in the background. Lighting Consultancy and Project Management for Historic Buildings LIGHT PERCEPTIONS e: mail@lightperceptions.co.uk w :www.lightperceptions.co.uk t: 01494 899440 Lighting Consultancy and Project Management for Historic Buildings