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CAIS 1440 is created for OPSS 1440, December 2021. This updates the existing CAIS 1440, December 2021 that is published on Tech Pubs.

CAIS 905 is created for OPSS 905, November 2024. This updates the existing CAIS 905, Mar 2023 that is published on Tech Pubs.

Updating CAIS BITU 0030 to match changes in BITU 0030.

SP109S24 has been updated to update crack repair criteria and have included the description of “Stress immediately prior to transfer”.

OPSS 905 &OPSS 1440 has been updated to incorporate existing SPs & feedback collected from internal groups and committees.

As part of the specification publication process, Engineering Materials Office (EMO) Concrete Section is posting the draft update to OPSS 1350 for external stakeholders’ consultation prior to publication in November 2024.

As part of the specification publication process, Engineering Materials Office (EMO) Concrete Section and Structures Office is posting the draft update to OPSS 904 for external stakeholders’ consultation prior to publication in November 2024.

CAIS 1301 is created for OPSS 1301, November 2024. There is no existing CAIS for 1301.

As part of the specification publication process, Engineering Materials Office (EMO) Concrete Section is and submitting OPSS 1301 for external stakeholders’ consultation prior to publishing the updated specification. Portland Limestone cement has been added to OPSS 1301, therefore, where OPSS refers to Portland cement it is deemed to mean Portland cement or Portland limestone cement. There is an SSP accompanying this change.

Updating CAIS 510 to match changes to OPSS 510

MTO is seeking feedback on the proposed change to the publication date of OPSS PROV 127 from April to July starting in 2025, allowing MTO to better align with timing of the inputs to the rate calculations. MTO is not changing OPSS PROV 127 and MTO is not looking for comments for the OPSS PROV 127 at this time.