Attachment_2_-_Addendum__1_to_the_Specifications.pdf

Addendum #1 to FY-16-CoF-Repair Research Aircraft Integration Facility (RAIF) Mechanical Systems, Solicitation Number NND16568486E

Purpose:

The purpose of this request for changes to the solicitation is due to the discovery of deficiencies effecting the drawings of this project requiring edits to Mechanical and Electrical disciplines. Items to be amended are as follows:

a. Sheets A-103. Revise size and relocate new walls of Boiler Room 158A per attached Detail 3 – Addendum 1 – Sheet M2.11 - Mechanical Central Plant Boiler Room Plan. Wall and door types remain unchanged.

b. Sheet A-203. Revise size and relocate new walls of Boiler Room 158A per attached Detail 3 – Addendum 1 – Sheet M2.11 - Mechanical Central Plant Boiler Room Plan. Revise Reflective Ceiling Plan accordingly (fixture count remains unchanged, adjust existing fire suppression system sprinkler heads locations as required for coverage, adjust suspended light fixtures per new room size and mechanical equipment and piping layout).

c. Sheet M2.11. Revise size, relocate new walls, and relocate mechanical equipment layout in Boiler Room 158A per attached Detail 3 - Addendum 1 – Sheet M2.11 - Mechanical Central Plant Boiler Room Plan.

d. Sheet M1.30. Delete Detail bubble 4/M4.01. Security bars in ductwork that penetrates roof are not required.

e. Sheet M5.03. At Hangar Variable Flow Air Handling Unit (AHU’s) schematic control diagram, change hot water coil control valves from three-way control valve to modulating two-way control valve. Contractor shall demolish existing three-way control valves and replace with direct digital electronically controlled modulating two-way control valves. Typical of five existing AHU’s (AHU-14, 15, 16, 17, and 18).

f. Sheet M5.08. Heating Hot Water Central Plant Flow Diagram. Field verify location of existing DPT and notify Facilities Project Manager/Contracting Officers Representative of exact location. Relocate Primary Hot Water Flow (P)HWF meter and Primary Hot Water Supply PHWS temperature sensor from Boiler #3 hot supply piping to common hot water supply piping downstream of primary hot water pumps.

g. Sheet E1.1C. Electrical Plan Note 7 shall be listed under Optional Work (Secondary Scope of Work) as Option 1.

h. Sheet E2.11. Revise size, relocate new walls, and relocate mechanical equipment layout in Boiler Room 158A per attached Detail 3 – Mechanical Central Plant Boiler Room Plan.

i. Specifications Section 01 11 00 Summary of Work, page 8, Secondary Scope of Work, revise per attached page 8 to include new Option 1 - Installation of Dynasphere Mast and Dome lightning suppression system to protect Global Hawk electronics doghouse on Roof of B4840 above Hanger Bay 3.

Installation manual and location drawing are attached to and apart of this addendum. Government furnished equipment includes the mast, roof anchor assemblies, guy wires, the Dynasphere dome. Contractor to furnish #4/0 copper conductor from mast mounted Dynasphere dome to existing lightning suppression grid. Connect to existing building lightning suppression grid with Cad-Weld.

Attachments:

1. Detail 3: Amendment 1 –Sheet M2.11 – Mechanical Central Plant Boiler Room Plan.

2. Specification Section 01 11 00 – Summary of Work, page 8, Prioritize list of Secondary Work (Additive Bid Options).

3. Dynasphere Mast Mounting Details

4. Eritect System 3000 Installation, Operations, and Maintenance Manual

Shelter

50'-0"

8'-0"

8'-0" ejcarrol Callout Mast/Dynasphere location. Contractor to provide #4/0 copper conductor from Dynasphere to existing lighting suppression grid branch dead end (labeled as point A above). Connect to dead end with Cad-weld.

ejcarrol Line ejcarrol Line ejcarrol Line ejcarrol Callout Existing branch dead end conductor "A". Connect Dynasphere conductor to branch dead end conductor using Cad-weld.

ejcarrol Callout Existing Lighting Suspression Grid

18.0in.

Antenna Mast Base Plate

Roof Panel

Raised bracket

1 ½” Aluminum angle

3/8” Hex Bolt

8 places

18.0

Roof Panel

Raised bracket

1 ½” Aluminum angle

3/8” Hex Bolt

2 places

18.0in. 18.0in. 18.0in.18.0in.18.0in.

~3'-4"~3'-4" 3'-4" 3'-4"

3'-4"

3'-4"