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Bridge Inspection, Katherine Aqueduct

Midgie hoods donned as an important part of their PPE for some truly Scottish rope access bridge inspection work, the SG Access Rope Access Bridge inspection team undertook inspection for assessment of Duchray Old Truss Bridge / Katherine Aqueduct, a three span metallic truss girder bridge carrying a drinking water supply in Queen Elizabeth National Forest, Stirling, Scotland.

  • Rope Access Bridge Inspection_Katherine Aqueduct
  • Rope Access Bridge Inspectors _ Duchray Old Bridge
  • Bridge Inspection via rope access _ Katherine Aqueduct
  • Bridge Inspection via rope access _ Duchray Old Bridge

Bridge Inspection, Katherine Aqueduct

Midgie hoods donned as an important part of their PPE for some truly Scottish rope access bridge inspection work, the SG Access Rope Access Bridge inspection team undertook inspection for assessment of Duchray Old Truss Bridge / Katherine Aqueduct, a three span metallic truss girder bridge carrying a drinking water supply in Queen Elizabeth National Forest, Stirling, Scotland.

Mode of access: Rope Access

Task in hand: Rope Access Bridge Inspection

Location: QE Forrest, Scotland

Team Size: 4

Duration: 1 week

51m long, with a central span of approximately 25m, Duchray Old Truss Bridge was constructed in 1859, and is a three-span twin truss girder bridge structure founded on masonry piers and abutments. The Loch Katrine Aqueduct is a pressurised pipe carried within the truss carrying drinking water.

SG Access rope access bridge inspectors were tasked with Inspection for Assessment of Duchray old Truss Bridge, including:

  • provision of method statement and risk assessment for the task in hand, including safe access, egress and rescue via rope access.
  • familiarisation  with the current defect schedule on the structure, prior to commencing site work in order to accurately report on the condition of all defects previously recorded.
  • record the length and depth of each truss, as well as the spacing between the two parallel trusses.
  • record structure dimensions including section sizes sufficient to produce a GA drawing.
  • measure areas of section loss, and record their locations and extent, sufficient to allow a numerical assessment of the structure’s load capacity.
  • record the location, extent and form of any new defects identified during the inspection, including provision of photographic report.

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