1. Truss End
Link Failure
Forth Road Bridge
22 December 2015

2. What’s Been Done – SITE / CONSTRUCTION
• Safety Paramount
• >250 Site Safety Inductions
• Exceptional Dedication in Face of Challenging Environment
• 11 sub-contractors
• Temporary Access – Scaffold / MEWP / Barge
• 67 Scaffolders
• Steel Fabrication / Welding / Jacking
• 46 Specialist Welder / Fabricators

3. What’s Been Done – INSPECTION / INVESTIGATION
• Close Visual Inspection Entire Bridge
• 76 Engineers & Inspectors (55 Rope Access Qualified)
• High resolution Drones used for 1st time
• Non Destructive Testing
• Ultrasonic Tests, Magnetic Particle Inspection
• 21 Engineers & Technicians
• CCTV Camera observing crack 24/7

4. What’s Been Done - DESIGN
• Design / Check / Certification of Repair completed in
parallel with fabricating ‘splints’
• 53 staff (including 21 Chartered Engineers)
• Design of Temporary Access – Scaffold (Hanging &
Tower) ; MEWP ; Barge
• 16 Engineers & Technicians
• Design of Sophisticated Structural Monitoring System
• 14 Specialist Engineers
• 1st Time used on Forth Road Bridge – similar system to Queensferry
• Design of Traffic Routes / Signage / VMS
• 38 Engineers & Technicians

5. What’s Been Done - COMMUNICATIONS
• Websites – Forth Bridge & Dedicated Site
• Media Enquiries
• 120no.
• >400 Press articles
• Twitter Followers
• 43,006
• Facebook Likes
• 360,000
• 2 million engaged via facebook
• Physical Model Created

6. Controlled Load Test To Observe Structural Behaviour

7. Why HGV Restriction
• Lower Pin NOT
rotating as
hoped
• Strain Gauges
measured live
results during
load test

8. Next Steps
• Re-open to all traffic (except HGV’s)
• Load Test verification
• Sophisticated Strain Gauge / Structural Monitoring Device verification
• Non destructive testing verification
• Independent expert verification
• Full inspection of bridge verification
• Permits 91% of traffic to re-use the bridge and a
32% reduction in loading
• Committed to HGV re-opening
• Permanent Design - Completion early January 2016
• Strain Gauge / Structural Monitoring Device
• All 8 truss end link areas – mid January 2016
• Start Construction to NE Link
• January 2016