Comments

Under 3.3 Hollow and Solid Precast Slabs

The 1220 mm wide hollow slab typically contained three circular voids. However, they are not recommended for several reasons.

maybe use included in the standard OPSD? that will be more specific.

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Tightly spaced girders make it physically harder to properly view between the girders. The minimum spacing between NU girders should be 1.8 m.

The sentence in between the above seems not necessary.

I reviewed proposed prestressed concrete girder guidelines and drawings, the guidelines are concise and perfect, and covered all girder design issues, which is easy for design engineer to follow, and also the standard drawing are so much in details. Read more

Thank you for the opportunity to provide comments. Please see attached MTO standard drawings and Girder Guidelines marked-up with our member's comments. Note that we only commented on the NU2400 unit drawing as the comments are applicable to all the other NU girder sizes as well. Read more

This is a comment on the Prestressed Concrete Girder Guidelines (August11 2023).pdf document but more specifically on OPSS.PROV 909 clause 909.07.12.01. Read more

NU girder depths documented in the guideline vary by different increments with a 300 mm difference between the 900 and 1200 girders and 400 mm difference between the 2000 and 2400 ones. Girder depths have been produced in the past that are different than the 7 sizes in the guidelines. Read more

Prestessed Box Girders: - On the standard grid arrangement on SS107-13, strands have been removed from the bottom corners of the cross-section and placed at the top of the cross-section, why have these been omitted from the corners? Read more