Attachment 01_Basis of Design Narrative.pdf
PDF 129 KB Posted
- Attached to
- B409 ROOF REPAIR
- Solicitation number
- W50S8R-25-B-A001
About this file
This is a Basis of Design narrative document for a roof repair project at Building 409 at Mansfield Air National Guard Base in Ohio. The project involves removing the existing TPO roofing system and polyisocyanurate insulation, to be replaced with a new 90 mil EPDM roofing system with cover board and two layers of polyisocyanurate insulation boards fastened to the existing metal deck. The system will include a 20-year weather and finish warranty.
The project (PBXP192103) addresses multiple roof sections that were originally constructed in 1978 and previously replaced in 1988 and 1995, with an additional section (Roof A) added in 2005. All existing roof warranties have expired. The related solicitation (W50S8R-25-B-A001) is set aside for small businesses with a NAICS code of 238160 and size standard of $19M. The project's magnitude is between $2-5M, with bid opening scheduled for February 20, 2025. The work will be performed at the 179th Cyberspace Wing facility in Mansfield, Ohio, under the Department of the Army Ohio National Guard.
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Text version
111 Wood Avenue South, Suite 102, Iselin, New Jersey 08830
Phone: (973) 379-3400
MANSFIELD AIR NATIONAL GUARD
Ohio Air National Guard
Mansfield Lahm Airport, Mansfield, OH
Basis of Design – Type B-3 – Design Intent
PART 1 — DESIGN INTENT
PBXP192103 Repair Roof Building 409
Summary
The project consists of removing the existing TPO roofing system (including polyisocyanurate insulation). The new roof will be a 90 mil EPDM roofing system with cover board, and 2 layers of polyisocyanurate insulation boards fasten to existing metal deck. This system will provide a 20-year weather and finish warranty.
Cover Sheet
The Cover Sheet includes places for the signatures of The Air Commander, BCE, the Using
Organization Representative, Environmental Manager, Fire Chief, Security Chief, Safety Officer and Communications Chief. The BCE will obtain these signatures prior to submission of the
Design Intent document to NGB/A7O.
TAB A – Project Narrative Requirements
The below functional requirements were developed by the A-E based on information gathered during a site visit with of key CE staff members and the subsequent correspondences.
Project Number, Title and Brief Overview of the functions performed at these facilities are included in the following synopsis of scope and project intent.
Project Number: PBXP192103
Project Title: Repair Roof Building 409
Project Location: Mansfield Lahm ANGB, Mansfield OH
This project consists of evaluating the roofing systems and recommending repairs or replacements.
A1.1 Scope
The intent of this contract is to replace the existing roofing systems on Building 409 at the
Mansfield Air National Guard Base. The design will resolve water infiltration throughout the roof
Basis of Design
Type B-3 – Design Intent
Repair Roof Building 409
Mansfield Lahm Air National Guard Base
111 Wood Avenue South, Suite 102, Iselin, New Jersey 08830
Phone: (973) 379-3400 areas. The Main Roof, Roof B and Roof C were originally constructed in 1978 along with the building. They were replaced in 1988 and again in 1995 under a warranty claim. Roof A, over a building addition, was constructed along with a major Alter and Repair project in 2005. The warranties have expired for all of these roofing systems.
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