| Description | The file contains correspondence and enclosures, photocopies of parts of plans and diagrams and graphs largely related to Theatre Projects Consultants Ltd's process of seeking approval from the Greater London Council (GLC) for various aspects of the stage equipment, including auditorium lighting; sound and fire doors; property store door; wagons; stage dividing doors; smoke seal; mechanism, battery, trap arrangements and rising handrail for drum revolve; safety curtain; matrix cubical; electrical installation; false proscenium and fascia; main motor for the paint towers; slide projection rooms; lighting hoists and flying equipment as well as safety tests and licence restrictions on the use of certain equipment. Further correspondence refers to sound insulation for doors and control room windows and insurance tests. Correspondents include Theatre Projects Consultants, Greater London Council (GLC), Evershed Power Optics Ltd, Flint & Neill, Denys Lasdun & Partners, Mole-Richardson (Stage & Studio Engineering) Ltd, Henry R Humphreys ARIBA (Acoustical Consultant), Tele-Stage Associates Ltd, London Fire Brigade Headquarters, the National Theatre, National Vulcan Engineering Insurance Group Ltd. Items include letters from the GLC granting approval for various aspects of the equipment installation, an internal memo 'National Theatre Acoustics' describing the acoustics problems noticed by David Collison and his team and a graph showing noise levels caused by operation of the side door to the Cottesloe Theatre. Original card folder disposed of. '904/3D (2) Consultants. Acoustic and Others opened. 1-3-74 onwards' was written on the spine. |