Questions_Concrete_Barrier_Q&A_2.pdf

Questions and Answers No. 2

Solicitation Number SCO15017R0013 Concrete Defense Barrier

1. Is there a minimum number of soil surveys required due barrier is 160 meters long?

Ans: There is a soil study provided and there is the responsibility of the awarded contractor to execute his own soil survey for the work required.

2. We request to receive from the CNP the existing drawings or blue prints of the utilities which may cross the path of the barrier.

Ans: Each offeror is responsible for knowing and understanding the project requirements regardless of what may or may not be covered at the site visits.

3. Please confirm on a drawing the exact location of the barrier; according to site visit it must be located 9 meters away from the sidewalk curb outside the Base.

Ans: As addressed during the site survey the barrier wall shall be 9m from the edge of the road, each offeror is responsible to do its own calculation and drawing if he/she wishes to do so, no drawing will be provided.

4. Will the path of the barrier run parallel to the curb mentioned on item 3?

Ans: See response to question 3.

5. Will it be necessary to install fencing (canvas) alongside the construction of the barriers (160

m) or only on the camp site?

Ans: Yes, as addressed during the site visit the awarded contractor is responsible to maintain a barrier throughout the project.

6. It is recommended that the corners of the barrier should not be straight edges but chamfered.

Ans: It is the offeror’s call what he or she wants to present….only the best recommendations will be considered.

7. Attachment 1 mentions a structural design supplied by the Government, which is not part of the documents. Please provide such structural design drawings, specially indicating the rebar diameter in every portion of the barrier.

Ans: All design to be provided has been provided

8. The concrete finish of the barrier will be smooth or might it be considered rough? This question is done to consider the type of formwork to be used and the condition of the paint that must be guaranteed for 10 years.

Ans: An ascetic finish whether smooth or rough is required, offeror presents its recommendation.

9. According to site visit, existing fence built in barbed wire and support structures will not the intervened, this must be clarified by Police and INL.

Ans: As you state, during the site visit it was stated that the existing barb wire fence will not be touched.

10. There is an inspection box which will interfere with barrier alignment; is possible to obtain

Base drawing that show such utility?

Ans: Each offeror is responsible for knowing and understanding the project requirements regardless of what may or may not be covered at the site visits.

11. The final disposal dumpster for removed material, must be certified?

Ans: Yes it must be certified.

12. On site visit was evident the need of either a box culvert or pipe installation to permit the flow of water of a natural swale encountered. This design is solely proposed by each contractor or does the government will advise what system suits best?

Ans: The offerors are required to submit their design, only the best will be considered as acceptable.

13. Is there a need, in terms of percentage of time, of permanency on site of a hydraulic engineer if hydraulic installations are to be relocated? Please inform.

Ans: As required to be in compliance with the SOW.

14. Is there a need, in terms of percentage of time, of permanency on site of an electrical engineer if electrical installations are to be relocated? Please inform.

Ans: As required to be in compliance with the SOW.

15. Besides any electrical installation that might interfere with barrier path and needs to be removed; is there any infrastructure that needs to be relocated according to CNP needs?

Ans: Refer to the SOW and the site visit.

16. Will the gate beside the construction site be available for delivery of materials including concrete trucks? Is there a special permit that needs to be requested to the CNP in terms of security issues (the permanent presence of a policeman on the gate?).

Ans: Yes, as to the gate and refer to the SOW and the site visit to answer the rest of your question.

17. The entrance for construction personnel to the Base will be the normal gate or is there a possibility to set up another gate for entrance; maybe the one beside construction site?

Ans: To be discussed upon award.

18. Although materials on site will be stored inside the perimeter fencing (canvas) of the camp site, is there a need to have a security guard at night? I mean there is not much security from the street to the Base on that site.

Ans: Contractor is solely responsible for the security of the contractor’s material and worksite.

19. If the Primavera software will be needed please have it included as an attachment to consider it on budget.

Ans: For this specific project Primavera Software shall not be required.

20. There is a requirement of corrosive inhibitor for the barrier. What kind of inhibitor is being requested? For the rebars or to be included on the concrete mix? There is a huge difference on volume and cost depending on this element. Please clarify the use of such product.

Ans: No inhibitor of corrosion required for the rebar.

21. Steel mesh shall be galvanized? Please reconsider. Drawing mentions electrowelded mesh.

Ans: Please refer to the SOW.

22. Fibrillated fiber as secondary reinforcement? Polypropylene type or polypropylene/polyethylene type? Does the government have the proportion for cubic meter of concrete or is that a responsibility of the contractor?

Ans: Please refer to the standard for the mix.

23. Is the fiber requested as secondary reinforcement only or also to avoid cracking of the barrier surface? This has direct impact on quantity of the product.

Ans: Yes, the fiber is a secondary reinforcement.

24. Please include reinforcing bar dimensions of the designs requested on item 7.

Ans: Refer to drawing 02 of the technical documents for reinforcement information. The re-bar shall be Fy= 60,000 psi (4,200 Kg/cm2) and Ø 1/2-inch.

25. Please clarify item 4.1.4 of attachment 1 within the design drawings. Is a very considerable amount of reinforcing rebars.

Ans: Please refer to the drawings provided.

26. Is necessary to show on design drawings the type of anchorage to be constructed between the inner and outer walls and concrete cap.

Answer: Yes, it is required to show on the design drawings all detail.

27. Is it permitted to modify the grading 1 meter beside the barrier on both sides in order to assure 3 meter height?

Answer: Please refer to discussion during the walkthrough.

28. According to site conditions, the grading has one particular big difference (more than 1 meter high). Please confirm that the barrier will be stepped.

Answer: This was clearly addressed during the walkthrough.

29. If the finish surface of the barrier is smooth and painted, please revise the warrantee period of the paint, due, a smooth surface does not offer a proper anchorage for the paint to last 10 years.

Ans: Paint warranty remains the same, no revision or modification to the 10 year warranty.

30. What is the scope of the warranty coverage? Does it incude touch up maintenance during a 10 year period?

Ans: The paint shall be warrantied for a period of 10 years for peeling, flaking, discoloration etc.

31. If paint is required please inform color.

Ans: As discussed during the walkthrough paint is required and the color is the same white as the major structures on the facility.

32. Please confirm with CNP the working hours authorized to perform work. Is it possible to work from 07:00 to 18:00, 7 days a week?

Ans: As discussed during the walk through, normal work hours apply and upon award, with further discussion with CNP commander on site, extension of normal work hours may be submitted for consideration.

33. Is there a necessity to have a SSHO permanent on site?

Ans: Yes

34. According to site visit there is no energy available on site meaning the need of having a power plant on site; is there a special permit to be requested to CNP?

Ans: No special permit required for the contractor to have a generator on site.

35. Water supply will be done connecting a meter to the existing network; is there a possibility to have the location of this network on a drawing?

Ans: The supply of water is the responsibility of the contractor; no connection is authorized at this time. Upon award this may be addressed with the COR and CNP.