Attachment 15 - MAHG211009 Technical Questions answered.pdf

FA301024R0008 Technical Questions from Pre-Bid Site Visit

Q1. VAVs in the attic did not appear to have maintenance disconnect switches, are we to add them?

A1. Per drawings, sheet 4 and sheet 26, under VAV Box Schedule: 1. Each VAV box shall be provided an individual 120 VAC disconnect switch.

Q2. Please confirm the maintenance disconnect switches exist on the room VAV’s?

A2. Yes, disconnect switches exist on the room VAVs.

Q3. Will fire watch be required when disabling the duct detectors in the units being demoed? Or is it just for full system shut down?

A3. Yes, per SOW, section VID, “During the times that the fire alarm system or fire suppression system will be rendered non-functional in any manner, an approved/certified fire watch will be provided and coordinated with the user and the inspector prior to shut down in accordance with any requirements of the Fire Marshal. The watch will be maintained during the times any part of the building is unoccupied.”

Q4. What is the approximate distance to the 120v source to feed the UV lights?

A4. The approximate distance is 20 feet.

Q5. Are new panels required for every AHU?

A5. Yes.

Q6. It is stated that conduit may be reused if in good shape, but all wiring must be replaced. Please confirm.

A6. Reference controls notes in the drawings.

Q7. For VAV transformers, are they allowed to be packaged with the equipment or do they need to be provided specifically by the controls subcontractor?

A7. Yes, they may be packaged with the equipment however, the VAV transformers will have to be compatible with the newly installed controls system.

Q8. For VFDs, are they allowed to be packaged with the equipment or do they need to be provided specifically by the controls subcontractor?

A8. Yes, they may be packaged with the equipment however, the VFDs will have to be compatible with the newly installed control system.

Q9. Is 3rd party commissioning required or can commissioning be completed by the mechanical contractor?

A9. Commissioning may be completed by the mechanical contractor if the commissioning agent is independent of the DDC controls contractor and is ASHRAE certified according to SOW, VI. Scope, C Mechanical,2. New Work, sections iv and v. If not, a 3rd party commissioning agent will be required.

Q10. Per the SOW, Project Phasing, only one AHU can be demolished and replaced/started at a time since the building is to remain operational during construction. However, for these units to run properly, they will need to be connected to a controls system. Is the intent to keep the old controls system in place and operational during construction and at times having two controls systems operating the building simultaneously?

A10. The new controls system will be installed first.

Q11. Please confirm the government would like the following design submissions

– 65%, 95%, 100%, 100% IFC, As Builts.

A11. Yes, per SOW, Section VII Project Coordination, B Project Design Coordination.

Q12. So that we can build our schedule properly for the technical proposal, please confirm the amount of time (calendar days) the government will have to review each of the design submissions.

A12. The government will have 15 calendar days to review each design submission.

Q13. So that we can build our schedule properly for the technical proposal, please confirm the Design NTP will be issued after the contract award and after the preconstruction submittals have been approved by the government.

A13. Per SOW, Section II C, a Notice to Proceed (NTP) will not be provided unless a draft Project Schedule is received within 5 days prior to the Design Kick-Off meeting. Following the issuance of the NTP, the contractor shall provide an updated schedule that illustrates the project in real time within three (3) days.

Q14. Please confirm the amount of time in calendar days the contractor will have from receipt of Design NTP for the design phase of this project.

A14. Per SOW, Section III, A, 90 calendar days.

Q15. Please confirm the amount of time in calendar days the contractor will have from receipt of the Construction NTP for the construction phase of this project.

A15. Per SOW, Section III, B, 270 calendar days for the construction phase.

Q16. Please confirm the hours during the day we will be able to operate onsite for construction.

A16. Per SOW, Section VII E, project work area(s) will be available for contract work between 7:00 A. M. (0700) and 5:00 P.M. (1700) on Monday through Friday (excluding Federal holidays).

Q17. Please confirm the building has been tested for Asbestos and that no asbestos is present.

A17.The buildings have been tested and no Asbestos was found in the tested locations.

Q18. If the answer to question Q17 is no, is the contractor required to conduct an asbestos survey?

A18. No, Contractor is to follow SOW, Section VII, J, 3.

Q19. If the answer to question Q18 is yes and asbestos is found. Will the government issue a MOD to remove this asbestos?

A19. Contractor is to follow SOW, Section VII, J, 3.

Q20. Will the CAD or REVIT files be provided for the 30% design that was produced?

A20. Yes, CAD files will be provided.