Amend 01 Atch 02 - Questions and Answers.pdf
PDF 191 KB Posted
- Attached to
- B502 ATC Lightning Rod Repair
- Solicitation number
- FA449724R0007
About this file
This document is a set of Questions and Answers related to solicitation FA449724R0007 for the B502 ATC Lightning Rod Repair project at Dover AFB.
The key details are:
- The existing lightning protection system utilizes a ground loop, and any problems identified during the UL certification inspection will require the contractor to submit an RFI for resolution by the Contracting Officer.
- Caution tape and posts are adequate to cordon off the work area, and the existing mast mounting brackets can be utilized if they are converted from stainless steel to galvanized plain carbon steel.
- A crane or lift will be necessary to load materials to the roof, and a 3rd party inspector is required per UFC, which could be a UL inspector or other qualified party.
- No airfield driver training or on-site office is required, but FAA permits may be needed if a crane is used.
- Existing surge suppression devices are present on the electrical panels, and any wiring in the down conductor conduit that needs to be relocated will be the contractor's responsibility.
- The government will provide a material laydown area near the tower if required, and will address any differing site conditions per FAR 52.236-2.
- Aluminum masts are acceptable if they meet code requirements.
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Text version
DEPARTMENT OF THE AIR FORCE
436th Contracting Squadron (AMC)
639 Atlantic Street Dover AFB, Delaware 19902-5016
19 April 2024
MEMORANDUM FOR ALL OFFERORS
FROM: 436 CONS/PKAA
639 Atlantic St Dover AFB, DE 19902
SUBJECT: FA449724R0007, B502 ATC Lightning Rod Repair - Solicitation Questions and Answers
1. Does the existing LPS utilize a grounding loop or are ground rods located at each down conductor?
GOVERNMENT RESPONSE: A ground loop.
2. If a problem with the existing LPS is identified during the UL certification inspection, how will this be handled?
GOVERNMENT RESPONSE: The contractor will be responsible for submitting a Request for Information (RFI) identifying the site concerns and contractor proposed remedy. The Contracting Officer (CO) will determine the best resolution based on the Government review/assessment of the
RFI.
3. Will caution tape and posts be adequate to cordon off the work area?
GOVERNMENT RESPONSE: Yes.
4. Can the existing mast mounting brackets be utilized for the new masts?
GOVERNMENT RESPONSE: They can be utilized to weld to, to adapt the new mounting backets. It will be permissible to thread steel brackets into the galvanized plain carbon steel mounting bracket couplings, then provide a continuous fillet weld around the circumference of the coupling/nipple. Note, the failure of the existing mast that failed, was due in part to the fact the coupling was stainless steel and the mast was plain carbon steel. This stainless-steel coupling must be changed to galvanized plain carbon steel to adapt to steel. All welds and bases shall be coated with Zinc rich compound which shall be 95% by weight dried film, conforming to Fed Spec DOD-P-21035A & meeting Mil Spec MIL-P-26915A. Apply at least 2 coats 4 mil min total dry film thickness. If aluminum brackets/masts are provided the DOR shall ensure proper transition to the existing steel to prevent corrosion.
5. Can the interior access to the cab be utilized for loading materials to the roof or will a crane or material lift be necessary to load from the outside of the tower?
GOVERNMENT RESPONSE: A crane or lift should be utilized.
6. The SOW references a 3rd Party Inspector, is this for a UL certification or what is the intent of this inspection?
GOVERNMENT RESPONSE: The UFC requires a 3rd party inspector. This could be a UL inspector or other qualified 3rd party inspector.
7. Is airfield driver training required for this contract?
GOVERNMENT RESPONSE: No.
8. Is an on-site office a requirement for this project?
GOVERNMENT RESPONSE: No.
9. Are there any specific FAA permits required for this work?
GOVERNMENT RESPONSE: If a crane is used the Airfield Manager will notify the FAA as part of processing the Airfield Temporary Construction Waiver.
10. Are there existing Surge Suppression Devices on the existing electrical panels?
GOVERNMENT RESPONSE: Yes.
11. There was a previous question about existing wiring in the down conductor conduit. Has the government been able to identify what this wiring is and if the contractor needs to account for relocation of this wire in the contractor’s proposal?
GOVERNMENT RESPONSE: The government has made no effort to identify it. If required by code it will need to be relocated as part of the contract.
12. Where can a laydown area be located for this project?
GOVERNMENT RESPONSE: The Government does not foresee the need for material laydown for this project. An area near the tower will be provided if equipment must remain on-site for more than one day.
13. Can the test report for the annual ground resistance testing be provided?
GOVERNMENT RESPONSE: It is inspected annually and tested every two (2) years. Most recent resistance test results are provided as Amendment Attachment 03.
14. Can the QC also be the Superintendent/SSHO?
GOVERNMENT RESPONSE: No, see Statement of Work.
15. Since we were not able to see the complete project during the walkthrough, how are any differing site conditions going to be handled?
GOVERNMENT RESPONSE: The Government will address differing site conditions in accordance with FAR clause 52.236-2, Differing Site Conditions.
16. Is it permissible to use aluminum masts?
GOVERNMENT RESPONSE: Aluminum masts are acceptable if they meet all code requirements.
File details come from the government source that posted it. Updated .