Glen Buchberger, Head of Plant Maintenance, and Helen Obuchowicz, Assistant Manager, Maintenance Design, provided the platform gap update. The TTC has committed to repairing the platform gaps at five locations in 2018. An overview was provided of the potential locations and estimated timelines. The proposed stations listed for repair are:
- Eglinton: The proposed plan is to work on the gaps in advance of work to be conducted by Metrolinx, to retrofit the north and southbound platforms.
- St. Clair: Both northbound and southbound platforms have vertical and horizontal issues.
- St. George: The southbound station would be scheduled for the fall, due to the temperatures within the station.
- St. Clair West and Dundas: These stations have been added to the list of station platforms to be considered for repair, in the short term. The list is not definite, as locations to be repaired are variable, depending on issues found at each station.
A sample of the platform edge replacement tiles was presented to ACAT. These tiles will be used to raise or lower the level of the gap in order to obtain the optimum platform gap vertical height. Use of such tile is flexible to accommodate a variety of gaps across several stations. A sample of a horizontal gap filler was also shown, which will be attached to the vertical face of the cantilevered slab and used to fill any horizontal gaps.
The tile material is impervious to water and will not allow water to drain off the edge of the platform. Less maintenance of the new tiles is expected as they are thicker and more rigid and should not be damaged by overnight work. The product is used worldwide across various transportation networks, is designed to withstand various internal and external temperatures, and has a warranty of 15 to 20 years. In addition, there is little chance of objects getting caught within the rubber fingers of the horizontal gap filler.
Retrofits will be dependent on station closures. Construction will proceed by first removing the old tiles and using adhesive to fasten the new tiles to the existing system.
Questions and Comments from Committee Members
A member commented that Davisville Station has one of the worst gaps, along with having a narrow platform. Support was expressed for placing Davisville Station on the list, given the frequency of customer use. While members were informed that some locations are more technically challenging than others, further comments were made that the deficiencies at Davisville surpass those of St. Clair Station. The determination of what stations are initially scheduled for repair will be based on the schedule, as well as the difficulty of removing tiles at certain stations. Five stations is a realistic number given the unknown conditions and potential of difficulty at various stations. In addition, the schedule is constrained by the number of available subway closures. Davisville may be placed on the contingency list. Other factors include consultation with the manufacturers, purchase and delivery of materials, as well as further modifications that still need to be discussed. Construction is scheduled from June onwards, which will provide enough lead time to obtain the materials. ACAT’s recommendations of what locations should be prioritized will be reviewed to determine what can fit into the schedule.
A member requested the chance to try out a station once the repairs are near completion in order to determine how various mobility devices can move on the surface. Depending on the completion of installation (expected to take a month), feedback may be obtained once certain sections are complete.
Staff were urged to work on the stations that are considered to be the most problematic and unsafe. St. George Station was identified as a good choice, as it is an interchange station and is heavily used, given the number of students who attend University of Toronto.
The Chair observed that ACAT members are pleased that the project is being prioritized and is moving forward after many years of discussion.