OPSS 960 - Construction Specification for Buried Corrugated Steel Structures with Span Greater than 3.0 m OPSS 1805 - Material Specification for Corrugated Steel Structural Plate OPSS 1863 - Material Specification for Geomembrane

TCP number

000-0289

Notice type

Standard

Applies to

OPSS - Ontario Provincial Standard Specifications

No. specification

960, 1805 &1863

Posted by

Structures Office

Notice stage

Proposal

Proposal posted

March 11, 2026

Comment period

March 11, 2026 - April 1, 2026 (21 days) Open

Last updated

March 11, 2026

This consultation closes at 11:59 p.m. on:
April 1, 2026

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Proposal summary

Three new Specifications OPSS 960, OPSS 1805 and OPSS 1863 are being posted for review and comments.

Proposal details

With input from industry stakeholders, MTO’s Structures Office has developed updated construction and material specifications for Buried Corrugated Steel Structures & their supplementary documents. The new specifications include:
OPSS 960 – Construction Specification for Buried Corrugated Steel Structures
OPSS 1805 – Material Specification for Corrugated Steel Structural Plate
In addition, a supplementary specification, OPSS 1863 – Geomembrane, has been developed. The use of a geomembrane over buried structures is recommended to enhance durability and overall performance.

Supporting materials

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