W912L7-18-B-5001_QA__1-17.docx

W912L7-18-B-5001

QUESTIONS & ANSWERS 1-17

1. QUESTION- Specification section 16073.1.1.A –“The risers shall extend a minimum of 16” above the top of the roof.” Per UL standards we cannot allow any cable risers 9” above the roof deck. Please advise if the term risers here should be air terminals ( UL/NFPA standards are a minimum of 10” for air terminals )

1. ANSWER- This should be “air terminals”.

2. QUESTION- Specification section 16073.1.1.D – “ The installation shall conform with OSHA requirements for impalement protection “.Do the air terminals need to conform with CAL-OSHA requirements or are blunt /safety tipped air terminals approved?

2. ANSWER- Blunt/safety tip terminals are acceptable.

3. QUESTION- Specification section 16073.1.1.C –“ The system shall bear the Master Label”. In order to receive the UL Master Label certificate, the entire structure, including the new addition, is required to have LP system components afforded it. Does this meet with approval ?

3. ANSWER- Lightning system shall protect the entire building both old and new.

4. QUESTION- Specification section 16073.2.1.A – we may not be able to use copper components on areas of this structure. In order to conform with LP standards requirements, we will utilize system materials that are compatible with roofing materials being utilized in order to obtain the proper certification for this project. Does this meet with approval ?

4. ANSWER- Aluminum or copper material is acceptable

5. QUESTION- Specification section 16073.2.1.C –“ All connections shall be with the Burndy hyground system.”

i. Are these connections for below grade only.

i. ANSWER- Yes

ii. Are exothermic weld connections allowed as an alternate to the Burndy hyground series?

ii. ANSWER- Use of exothermic weld connections is acceptable.

6. QUESTION- Specification section 16073.3.1.A –“ All risers shall be concealed within the building construction.” The majority of the lightning protection installation for this project will be on an existing structure. Please advise if down lead cables concealed in conduit ( pvc sch 80 ) on the exterior would meet approval?

6. ANSWER- All risers in the new building shall be concealed with the new walls. All risers in the existing building shall be concealed on the inside of the building where practical and turn out to exterior of building as close to grade as possible. Exposed conduit in the highbay area is acceptable. For all routing inside the existing building coordinate with the contracting officer.

7. QUESTION- Specification section 16073.3.1.B – “Looped from the air terminal risers extend a #4/0 awg copper conductor underground to the main electrical power service grounding triad and connect thereto”.

i. We assume that this comment is for the common grounding between a LP down lead cable to the electrical service ground, correct? UL prefers, for certification requirements, that a master ground bus be furnished and all connections of Lp system and other incoming service utilities attach to the bus as a common ground point.

i. ANSWER- Contractor shall provide ground bus as necessary to achieve the “Master Label” certification. This shall also include any conduit and conductor routing necessary to achieve this label.

ii. A ground loop counterpoise is not required for this project, correct?

ii- ANSWER- Correct

8. QUESTION- I am inquiring about the bid for the Alter Security Forces B736 Upgrades. We are a general contractor in Nashville. Do we have to be preapproved to be able to bid this project?

8. ANSWER- There is no preapproval from this office. All interested bidders must be registered to conduct business with the government via Caution-www.SAM.gov. All information regarding bid information is posted on FBO Caution-https://www.fbo.gov/spg/USA/NGB/DAHA40-3/W912L7-18-B-5001/listing.html pay particular attention to Section 00010 of the solicitation.

9. QUESTION- Can you tell me what general contractors are bidding this project?

9. ANSWER- There is no way to tell until bid closing. Numerous contractors were interested during the sources sought.

10. QUESTION- Please see the attached for our Substitution Request to be an approved manufacturer for Metal Roof & Wall panels for the above project.

10. ANSWER- Concerning any substitutions see Specification Section 01600 paragraph 1.5 A.2

11. QUESTION- Is it the intent of the Government that the General Contractor employ and have on site a separate Superintendent, Quality Control Manager and Safety and Health Officer? It is standard industry practice on projects of this size and scope to utilize the Site Superintendent for all three of these roles as it would be prohibitively expensive to the Government to include the additional cost of these positions in the project bid package. Please advise as to whether it is acceptable to the government for the Site Superintendent to assume these three roles as this is a rather small project.

11. ANSWER- 11. ANSWER- This contractor must have a dedicated project manager and site superintendent. The contractor will be required to have a separate site safety and health officer. The contractor is not required to have a dedicated quality control manager so long as their quality control plan fulfills the requirements of specification section 01400 and the solicitation section 27.

12. QUESTION- Door Schedule sheet A8.1, Please verify that exterior opening 122B is to have a wood door.

12. ANSWER- Door 122B is an interior door, going from the corridor to CATM Classroom. It is a solid core wood door in a hollow metal frame as indicated on the door schedule on sheet A8.1. - eea

13. QUESTION- Door Schedule sheet A8.1, Please verify that wood door 133A is to be 2” thick.

13. ANSWER- It should be a 1 ¾” thick door, not a 2” thick door. - eea

14. QUESTION- Door Schedule sheet A8.1, Please provide frame material and information for opening 131A.

14. ANSWER- Door 131A is an existing door and frame. It will get new hardware only. - eea

15. QUESTION- Door Schedule sheet A8.1, Please advise: Door type “57” is given for opening 117A, however no such door elevation is provided.

15. ANSWER- Use door type “F” in lieu of “57”. - eea

16. QUESTION- Print IT2.1, detail A5 (note) specifies CAT6A for TV locations with a CAT6 patch cord. Print IT2.2, detail A1 (rack notes), Specifies CAT6 panels. Are we terminating CAT6A cables on CAT6 patch panels, and using CAT6 patch cords?

16. ANSWER- This is correct. The reason is this cable is rated 650 MHz, and is shielded. This cable for video is running inside the cable tray with data cables. However at the patch panels and the patch cables it is segregated. 10gbps throughput (CAT6a) is not required for the HDMI over CATx extenders. The contractor may substitute a 650 MHz Shielded Cat6 cable for the Cat6a.

17. QUESTION- Please verify if the contractor is to saw cut the concrete floor on both sides of the masonry wall approximately 100 locations And dig down to the footing to install strong backs

17. ANSWER- Yes, anchorage of the new reinforcing steel to the existing footings is required. Similar requirements for anchorage of new reinforcing steel to the existing footings also occurs at the new reinforced and grouted masonry pilasters for portions of the south wall and all of the north wall in the high bay space in the repair area. Refer to S2.1, S3.1 and 2A/S5.6 for grouted masonry pilaster reinforcement and anchorage requirements to the existing footings.