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Royal College of Surgeons, 41-42 (now 35-43) Lincoln's Inn Fields, Holborn, Camden, London, 1805-12 (with James Lewis)
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Reference number
SM D5/6/12
Purpose
Royal College of Surgeons, 41-42 (now 35-43) Lincoln's Inn Fields, Holborn, Camden, London, 1805-12 (with James Lewis)
Aspect
[153] Rough details of curved iron beam spanning the gallery lengthwise
Scale
to a scale
Inscribed
(verso, Dance) Iron Truss / front of Galleries / Museum
Signed and dated
- 1805-12
Medium and dimensions
Pencil on laid paper (480 x 845)
Hand
Dance?
Watermark
D & C Blauw IV and D&CBxX in cartouche surmounted by fleur-de-lis
Notes
See also [SM D5/3/37], [SM D5/3/36], [SM D5/6/13] for rough preliminary related details.
David Yeomans (correspondence, 2 August 2001) suggests that an arched flitch or trussing piece was proposed since the design shown on [SM D5/6/13] would not work. 'The trussing is clearly shown in the section as well as the elevation. This [Dance] braces at its ends against the straight pieces at the bottom of the beam that runs over the supports. He would need these because any tendency of the beam (and hence also the arched trussing pieces) to sag would result in the trussing pieces thrusting outwards. Thus the flat end pieces act as the skewbacks of the arch. Dance seems uncertain how to make these because he draws two arrangements. In the lower one the beam seems to be supported by iron brackets. He takes care in both arrangements that the minimum of iron shows under the beam by taking the line of the iron up from the soffit of the beam'.
David Yeomans (correspondence, 2 August 2001) suggests that an arched flitch or trussing piece was proposed since the design shown on [SM D5/6/13] would not work. 'The trussing is clearly shown in the section as well as the elevation. This [Dance] braces at its ends against the straight pieces at the bottom of the beam that runs over the supports. He would need these because any tendency of the beam (and hence also the arched trussing pieces) to sag would result in the trussing pieces thrusting outwards. Thus the flat end pieces act as the skewbacks of the arch. Dance seems uncertain how to make these because he draws two arrangements. In the lower one the beam seems to be supported by iron brackets. He takes care in both arrangements that the minimum of iron shows under the beam by taking the line of the iron up from the soffit of the beam'.
Level
Drawing
Digitisation of the Drawings Collection has been made possible through the generosity of the Leon Levy Foundation
If you have any further information about this object, please contact us: drawings@soane.org.uk