Note: detailed notes,…

Note: detailed notes, comments and highlights are provided in the attached file.

960.05.02.01 Backfill to Structure, 3rd paragraph - Remove Granular B Type I (keep Granular B Type II). Granular B Type I does not have enough gravel content and not enough crushed content to be suitable for engineering backfill on a soil-metal structure.

960.05.03 Bedding Material, 1st paragraph - Remove line "... unless bedding layer has a thickness... ... not exceed 37.5 mm in diameter". Maximum bedding particle size should not exceed 25 mm (or 26.5 mm) to prevent bridging of the backfill between the corrugation profile for 152 x 51 mm corrugated plate.

960.05.08 Granular Cover, 3rd paragraph - Remove Granular B Type I (keep Granular B Type II). Granular B Type I does not have enough gravel content and not enough crushed content to be suitable for engineering backfill on a soil-metal structure.

960.07.13 Assembly and Installation of..., 2nd paragraph - Will the Contract Administrator have proper knowledge of this this requirement. My experience is that 80% of MTO contracts cannot meet this requirement due to staged construction methods and structures involving extensions. More information/discussion can be provided is desired.

960.07.13 Assembly and Installation of..., 3rd paragraph - Consider adding text "for longitudinal seams of 152 x 51 mm Structural Plate corrugated Steel Structures" at the end of the paragraph. This requirement only pertains to the longitudinal seams on 152 x 51 plate structures. It does not apply to the circumferential seams or to any seams Deep Corrugated Plate Structures.