RFI RESPONSE 4 Abide RFI.rtf

October 17, 2016 Abide International Control Wing Basement and Chiller/Cooling Tower Modernization Oakland ARTCC, Fremont, California

Pre-Bid RFIs

10. Please confirm that all the construction materials are to follow the buy american act.

Refer to Contract Solicitation and FAA Contract Clause 3.6.4-3, Buy American Act-Construction Materials (Oct 2014). Exceptions –None.

Spec section 23 07 19-3.18-b.1 the specified .024 stainless steel outdoor field applied jacket cannot be applied to the condenser water pipe insulation diameters exposed to weather at the towers. The manufacturer’s recommendation for the job diameters is .010 thick. Please advise if

.010 stainless steel is acceptable or if the use of a comparable .024 gauge aluminum jacket is acceptable.

Specified jacketing shall be used

Spec section 23 07 19-3.17-d.1 is the specified pvc jacket that is color coded required or can the standard white colored pvc jacket be used on all systems specified?

Comply with Specifications

Spec section 23 07 19-3.13 the following equipment is not listed in the schedule to insulate. Please advise if they are required, and if so, please provide the insulation type, thickness, and method:

Chw pumps - Provide insulated box to match existing

Hhw pumps- No insulation required

Temporary and new exposed to weather condenser water pumps- No insulation required

Chw heat exchanger- Provide factory insulation.

Per Door Schedule Note 2 on sheet A 801, “Retain the FAA’s security system design integration (SSDI) contractor to relocate and provide as required access control door hardware.” This applies to hardware groups 1, 2, 3, 15 & 16. It is not clear what new access control equipment will be required and what will be allowed to relocate. Please confirm whether access control apparatus for the hardware groups above shall be priced for all new equipment, relocate all existing equipment or price all new equipment as an alternate.

Note referenced states “relocate as required”.

Specification section 05 12 00 regarding Structural Steel Framing require the fabricator and the installer to be AISC Certified. The AISC certification for fabricators and installers is generally reserved for major structural steel projects i.e. high rises, major bridges etc. Specification sections 05 50 00 regarding Metal Fabrications & 05 51 13 Metal Pan Stairs allow AWS D1.1/D1.1M and AWS D1.3/D1.3M. Will fabricators and installers with qualifications under the AWS structural welding code be acceptable for work performed under this project? All work will conform to the AISC code per note E1 under Structural General Notes on sheet S001.

Comply with contract documents

Will it be allowable for the site superintendent to also carry the roles of quality control manager and safety and health officer?

Comply with specification section 01 31 00 Section 1.5A

Per 3.2.2.3-71 Commencement, Prosecution, and Completion of Work: “complete the entire work ready for use not later than 465.”

It does not state whether this is calendar days or working days. Please clarify.

Calendar days