751.22438.ABG - TFSP ARPA II&M - B.1 Brink Overlook - Addendum 3.pdf

This addendum is a contract modification issued by Michigan Department of Technology, Management & Budget (DTMB) for the Tahquamenon Falls State Park Upper Falls Brink Overlook project. Addendum No. 3, dated June 5, 2024, provides specification clarifications for structural steel materials and fasteners at the viewing platform. The bid date remains Wednesday, June 12, 2024, and this addendum is incorporated into the contract documents dated April 25, 2024. The modification specifies steel types for beams, plates, and columns, as well as bolts, nuts, and washers required for the project.

The addendum revises Section 051200 of the Project Manual regarding Structural Steel Framing to establish specific material standards. W-shapes, channels, and angles must comply with ASTM A588/A588M specifications, while plate and bar materials also require ASTM A588/A588M compliance. Cold-formed hollow structural steel sections must meet ASTM A847/A847M standards. High-strength A325 bolts, nuts, and washers must be Grade A325, Type 3 heavy-hex steel structural bolts per ASTM F3125/F3125M, Grade DH heavy-hex carbon-steel nuts per ASTM A563, and Type 3 hardened carbon-steel washers per ASTM F436/F436M, all with plain finish. These specifications ensure consistency and quality standards for the structural components of the viewing platform project.