BL148_23 Ad _1.pdf

PDF 3 MB Posted

Attached to
BL148-23 General Building Roof Replacement Project-The One Justice Square Building
Solicitation number
PE-77023-NONST-2024-000000031
Issued by
Gwinnett County, Georgia

About this file

This document is an Addendum to a Request for Proposal (RFP) for a General Building Roof Replacement Project at the One Justice Square Building in Lawrenceville, Georgia, issued by the Gwinnett County Board of Commissioners. The addendum provides updates to the drawings, specifications, and clarifications to questions received. The project requires the installation of a new mechanically attached 80-mil TPO roof membrane system on new 1/2" protection board over 2" new polyisocyanurate insulation over the existing 2" polyisocyanurate insulation on the metal deck. Additionally, new metal coping, flashings, and other roof components are to be installed in accordance with FM Global requirements for wind uplift resistance. The addendum also notes that the roofing contractor must complete the FM Global checklist and provide a contractor's package from RoofNav for review and acceptance prior to installation.

The addendum provides pricing alternatives for a 60-mil TPO membrane and clarifies that Firestone Building Products and Uni Clad Metals are acceptable alternate manufacturers. The roofing work must be performed in accordance with FM Global Property Loss Prevention Data Sheets for roof deck securement, above-deck roof components, and perimeter flashing requirements, with specific enhancements needed in Zones 2 and 3 to the fastener spacing and stress plate/batten bar placement.

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Text version

ADDENDUM #1

BL148-23

General Building Roof Replacement Project The One Justice Square Building

October 04, 2023

1. PRIOR ADDENDUM:

1.1 N/A

2. SPECIFICATION MODIFICATIONS:

2.1 N/A

3. DRAWING MODIFICATIONS:

3.1 DRAWING A151

A. FM Global Requirements. The table with FM Global roof classifications for each roof area has been added.

B. Renovation Notes.

1. New keynote R-14 has been added.

2. Keynote R-4 has been revised to reference the detail 7/A151.

C. Renovation Roof Plan.

1. Section references 2/A152 and 3/A152 have been added at the elevator shaft roof.

2. Key note R-14 has been added at each housing for electrical conduits.

4. CLARIFICATIONS:

4.1 Question: Will you accept Firestone Building Products as an alternate manufacturer for membrane?

Response: Firestone is acceptable manufacturer.

4.2 Question: Will you accept Uni Clad Metals as an alternate manufacturer for sheet metal/metal roofing?

Response: Refer to Specification Section 07 61 00; 2.2.A.1.d.8)

Attachments:

Please see the following attachments for the above solicitation.

• Drawing A151

• Pre-Bid Conference Sign-in Sheet

Acknowledge receipt of this addendum on the Bidding Form, Page 000410-4.

END OF ADDENDUM #1

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