NWWP9240210008 Question and Answers.docx

NWWP9240210008 Question and Answers

1. You’ve provided clear antenna loading requirements for the 50’ tower, but the 30’ one just says “Install RSOIS equipment on 30’ level, all equipment provided by the National Weather Service.” Can you please provide some further information/specs as to what the RSOIS equipment will consist of?

a. pdf document with the RSOIS sensors has been uploaded

2. 50ft tower questions:

1. Without providing some sort of expensive platform all antennas cannot physically mount at the 50’ level. Please provide us mounting heights in the top section of the 50’ tower that would be acceptable along with what heights go with each antenna.

2. How do you intend on mounting the antennas to the tower? Clarify if you intend on side arm mounts or just attaching the antennas to the tower legs?

a. A pdf of the antennas that will attach to the 50’ tower has been uploaded. The mounting hardware used to attach the antennas to the pipes on the WFO building now could be used to attach to the new tower. They will have to research further to see if any of the antennas have height requirements.

3. 30ft tower question:

1. Can you provide the antenna loading equipment information for the 30’ tower similar to what you provided for the 50’ tower?

a. pdf document with the RSOIS sensors has been uploaded

4. Are any of the following required by the bidding vendor for this project?

- FAA/FCC Verification - No, this is replacing existing mounted antennas already in operation

- 1A study - No

- NEPA study - No, this is replacing existing towers

- Archeology study - No, this is replacing existing towers

- Local permitting - No, this is government owned land

- Site plans - No

- Construction drawings - Yes, drawings showing the placement of the new bases and conduit runs are required, SOW has been updated to include this requirement

5. Is it possible for you to extend the due date of this bid?

a. Yes an extension will be provided till 1/20/2021

6. Is a site visit required in order to bid it?

a. No, it is not required to do a site visit but we do require some sort of technical write up if a site visit is not done per CAR 1352.213-70.

7. What is the bury depth below grade that is required for the 4 inch conduit run to be installed? Is 4 feet below grade acceptable?

a. Conduit should be minimum of 24" below grade. 4 feet is acceptable

8. Is there a specification for the concrete to be used for the new tower foundation pads?

a. No, the contractor shall determine the appropriate concrete specifications for their proposed tower install

9. Is there any concrete or soil testing requirements?

a. No

10. Is there a requirement for the compaction of the backfill?

a. Follow industry standard

11. Are there any lightning terminations that are required to be made in this project?

a. No

12. What size is the new ground wire to be furnished and installed by the contractor required to be?

a. Contractor shall determine the appropriate grounding requirements per their tower specifications

13. Are the mounts and mounting hardware for the antennas that are to be furnished by the Government and installed by the contractor also being furnished by the Government, or is this the responsibility of the contractor?

a. They should be able to use the mounting hardware that is was temporarily used to mount the antennas on the WFO building. See additional picture.

14. Has any requirement for the completion of an FAA study of the elevations of the towers to be installed been identified or started?

a. No, as this is a replacement of existing towers with antennae heights already established

15. Relative to the identification of the current environment at the Lake Charles NWS office, and the criteria for the tower design in accordance with TIA-G, and pending the final design by a Professional Engineer, we have used Structure Class/Risk Category 2, Exposure Category C, and Topography Category 1. Is this acceptable or do you want any of these to be changed?

a. This is acceptable