CRSA Verse Testing

“I highly recommend RSS Infrastructure (RSSI) for their exceptional work and professionalism during the renewals work on the HBS route.”
Project Manager, CRSA

Services Delivered

RSS Infrastructure (RSSI) Welding collaborated with CRSA to carry out renewals work on the HBS route. RSSI collected stressing records and conducted Stress-Free Temperature (SFT) readings on reverse curb areas, rectifying stress on two of the six areas surveyed. Their welding team completed the re-stress work. On a tight curve, RSSI’s Verse testing team used stretcher bars to assist with fastening re-insertion, and all works were completed under possession. To meet Network Rail standards, RSSI employed an in-house planning team to ensure proper coordination and structure of worksites, liaising with CRSA weekly.

Key Actions

  • RSSI and CRSA collaborated on HBS route renewals work
  • RSSI collected stressing records and conducted SFT readings on reverse curb areas
  • Only 2 of 6 areas required stress rectification
  • Verse testing team used stretcher bars to assist on a tight curve
  • All works completed under a possession to meet Network Rail standards
  • RSSI employed an in-house planning team to coordinate worksites with CRSA
RSSI at CRSA Verse Testing


HBS Route

Project Value




Project Duration


Project Delivery

RSS Infrastructure (RSSI) worked with CRSA to support in the delivery of the renewals work on the HBS route. RSSI assisted in the collation of stressing records required for the Handback package and conducted the Stress-Free Temperature (SFT) readings needed for several areas of the reverse curb.

The CRSA teams had been unable to establish a constant SFT throughout the entire renewal’s worksite. To ensure that the rail was ready for Handback, Network Rail requested confirmation through SFT. The CRSA survey suggested there was potentially six pulls required. However, following RSSI’s SFT reading, we found that only two of the six areas tested required stress rectification. RSSI’s welding team completed the conventional re-stress of the two sections.

RSSI’s Verse testing team had a significant challenge when undertaking the SFT measurements on a tight radius curve. The team was able to mitigate this issue by using stretcher bars to assist in re-insertion of the fastenings. RSSI completed all the works under a possession.

To ensure that this project adhered to Network Rail standards, RSSI employed an in-house planning team who liaised weekly with CRSA to ensure that worksites were planned, structured and coordinated accordingly.

About Us

RSS Infrastructure provides multi-disciplinary infrastructure services for the rail, civil and utilities sectors. With offices in Birmingham, Cwmbran, and Doncaster, RSSI works with several clients, including Network Rail, WMCA, Midland Metro Alliance, HS2 as well as Tier 1 & 2 contractors. Services offered include; Arboriculture, Construction & Civils, Magnetic Track Safety, Possession Management, Rail Operations, Safety-Critical Resource, Signalling, Track Warning Services, and Welding.


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