Questions_and_Answers_Amend_00005__8_8_17.docx

ADDEMDUM 00005

SOLICITATION NUMBER FPS1700790

QUESTIONS AND ANSWERS

1. Spec 260519 paragraph 2.3 states “No MC allowed” will MC be allowed between junction boxes concealed in walls? For equipment connections? For concealed light fixture whips?

Response: Bid as stated in specification. Specific exceptions can be submitted as a question in a RFI during construction.

2. Spec 260534 paragraph 2.2A “4 in. octagonal boxes for fixtures. Would 4 in Sq. with 4 in P-rings be acceptable?

Response: Response: Intent of the octagonal boxes is to match round bases of light fixtures. As long as the luminaire bases cover the square boxes this is acceptable.

3. Spec 262726 paragraph 2.2C states “color to be selected by contracting officer”. Shall we assume standard colors (white, ivory, brown)? This paragraph is referenced in receptacles as well.

Response: Standard colors will be selected for faceplates and receptacles, refer to amendment No 2 for color of IT jacks.

4. Sheet E-8 detail 3 and 6 requires the electrical contractor provide structural engineering for the pole bases. Could the structural engineers of record provide this to us prior to bidding?

Response: Bid as stated on drawings. Another acceptable method is to use a pre-engineered anchor base such as Oldcastle Precast Omni Foundation Series.

5. Can there be structural/architectural details provided for bollard light installation in the concrete?

Response: Bid as stated on drawings. This suggestion can be asked during construction.

6. Can we get a detail of Patio outlet installation shown in base bid?

Response: Assuming this question is for the Alternate 1 outlets in wall. Conduit to be routed in the pre-cast concrete. Bricks will need to lay around the flush masonry junction box. Bottom of junction box to be 9-inches. Provide label on while-in-cover: “Event Power Only” due to outlet below ADA height.

7. Can we get clarification on PV system bidding? The drawings E-3 and E-6 do not match in module counts or size and as it is stated now it is unclear on how to price up. Do you want the additional 2 sections priced individually as an adder to the base size (increasing in size each time) or priced as 3 different but whole systems?

Response: The note on E-3 is an entire system minimum size for base bid, additive bid #5 and additive bid #6. The base bid system size is not included in the additive bid sizes. The name “additive bid” should only be thought of as a cost adder only to the base bid price. Base bid and each additive bid should be considered a complete different system to reach best price. Sheet E-3 points to the array section that belongs to base bid. Additive bid #5 and #6 includes section pointed to plus base bid. Note that #6 points to own section plus area also called out for #5. Sheet E-6 shows base bid except section bordered by note 7. The sheet keynotes revise one-line to additive bid #5 and #6.

8. Please confirm that the Local Utility company will be responsible for the secondary conductors and their installation?

Response: The contractor will be responsible for installing secondary conductors and to provide and install meter base, see revised electrical drawings..

9. Is the optional construction parking/trailer area shown on drawing C-13 the only area that can be used for this project? Is there material lay down areas available in the native grass areas? If native grass areas are used what finish condition is expected of these areas used?

Response: Contractor shall limit construction activities within the limits identified on the drawings, construction parking trailer can be located anywhere within these boundaries. Contractor shall limit lay down area within construction boundary identified.

10. What are our options for temporary power until permanent utility transformer is set in place?

Response: Temporary power is the responsibility of the contractor and could be provided for by portable generator, temporary service from the existing service at the Visitors Center or from the Xcel transformer to the north of the site. It is anticipated that the new transformer will be set approximately November 1st.

11. Drawing L-2 states that the relocation of Gate and Controls is by USFWS, drawing E-1 states to remove and relocate motorized gate equipment. Please clarify what scope the GC is responsible for in regards to the gate, controls, bollards etc.?

Response: Contractor shall extend and or relocate all power controls and associated equipment from current location to new location as called out on Entrance Road Realignment drawing E-1. FWS will relocate the gate itself or replace the gate with a new one.

12. Section 263100,2.2.C. & D. – Very specific module performance requirements and dimensions are called out. Are these really required or can we provide best commercial value?

Response: This is basis of design module and what the documents are designed based on. Select a product with similar quality and adjust design as required for the different product characteristics.

13. Section 263100, 2.2.E. & F - Inverter criteria

a. 13kW max array input power seems overly specific and there are other more logical and prudent options for this so must it be 13kW?

Response: This is basis of design and what the documents are designed based on. Select a product with similar quality and adjust design as required for the different product characteristics.

b. Max 600VDC is in conflict with 1000VDC max for modules – direction appreciated but I can tell you that 1000VDC systems are allowed by AHJs now per NEC Response: 1000VDC is acceptable.

c. Very specific inverter spec requirements. Are these really required or can we spec best commercial value?

Response: This is basis of design and what the documents are designed based on. Select a product with similar quality and adjust design as required for the different product characteristics.

d. For the larger add alternative (38.85kW), can we do a 1x 36kW, 1000VDC, 277/480V AC output inverter and then run through a step down XFMR?

Response: Preference is to not use a transformer. Bid without, this can be suggested as a VE idea during construction.

14. Section 263100, 3.2.C. – Is 1000VDC ok for the larger add alternative?

Response: 1000VDC is acceptable.

15. Is the SE azimuth of the PV array intentional? The performance of the array will be better if faced closer to true south.

Response: Array currently aligns with drive. Rotation of array can be considered during construction.

16. Noting that the PV arrays will require a “crusher fines pad and weed barrier” under them.

Response: Correct

17. Noting that 350 Watt modules are called out specifically. Is that a requirement? Not more not less?

Response: This is basis of design module and what the documents are designed based on. Select a product with similar quality and adjust design as required for the different product characteristics.

18. Noting that the spec’d DC capacity amounts are very specific, as detailed below. Can we instead provide best design (even string sizes), plus or minus a few modules? Our typical stringing design standard may not work out to these exact numbers of modules.

a. 19.95kW DC, 57 x 350W modules

b. 25.2kW DC, 72 x 350W modules

c. 38.85kW DC, 111 x 350W modules Response: This is basis of design and what the documents are designed based on. Select a product with similar quality and adjust design as required for the different product characteristics.

19. The one-line defines a very specific PV system. Is adherence to this design required?

Response: This is basis of design module and what the documents are designed based on. Select a product with similar quality and adjust design as required for the different product characteristics.

20. There are multiple locations in the drawings that refer to Additive Bid Items. Some of them are referenced in the updated bid schedule per Amendment 1. Additive Bid Item #4 (Electric Vehicle Charging Station) is not referenced in the updated bid schedule. We also do not see where additives 1A, 1B, 2 and 3 are supposed to be in 8 pages Response:The bid schedule has been revised in Amendment Number 4.

21. Keynote 20 on page A-2 is not found in the details on that page. Please advise.

Response: Keynote 20 is not used.

22. The window schedule and keynote 12 on page A-6 identifies the clerestory windows as aluminum storefront, however Keynote 13 on page A-9 identifies the clerestory windows as fiberglass. Please confirm these windows are indeed to be aluminum.

Response: Clerestory windows are aluminum storefront

23. Keynote 16 on page A-10 mentions gun lockers OFOI. Will these require in-wall blocking? If so, please specify.

Response: Owner furnished/Owner installed Gun safes are self-supporting.

24. Please confirm if the file cabinets, wardrobes, and storage lockers mentioned in keynotes 17 & 18 on page A-10 are included in this contract.

Response: Fixtures in question are included in this Contract, see Equipment Schedule on A-15.

25. Please confirm if the Work/storage station, 24” evidence locker, 36” evidence locker, metal locker cabinets, Open evidence shelves, and file drawer depicted in the Evidence room 118 are included in this contract.

Response: Fixtures in question are included in this Contract, see Equipment Schedule on A-15.

26. Detail 4 on sheet A-13 says to “protect exposed pipes”. Keynote 17 on A-13 says “P-trap protection.” Does this mean a kickpanel system is required? Please clarify.

Response: Protection is for ADA compliance (avoid burns, and abrasions).

27. Window type J appears to be the reception window at the Administration building. The details for this window do not show if this window is to receive a speak-thru port or if the glazing is to have a cutout for communication. Please advise.

Response: A speak-through port and the ability for a document pass through is required for this location.

28. Please provide more specification for the 4” wide metal end caps for exposed glu-lam beams as depicted in detail 9 on sheet A-16.

Response: Section 061800, reference paragraph 2.8 item B.

29. Sheet S-2, under the Close-web wood joists section reads: “The joist manufacturer shall visit job site as required and verify the proper installation of joists in writing.” Please clarify what is meant by “as required.”

Response: Minimum one visit, subsequent visits required until manufacturer is confident that joists have been installed correctly and is willing to issue letter

30. Please confirm motorized shades are only required at the clerestory windows, and that manual shades are to be used at all ground-floor-level windows.

Response: Confirming noted direction is correct.

31. Specifications for louver blinds and manual shades were provided in the spec book. The legend on sheet A-15 mentions roller shades and not louver blinds. Please confirm louver blinds are not used on this project.

Response: Louver blinds to be provided on all office windows Type A and Type A1. WT-2 will represent the louver blinds noted in the window schedule.

32. There is no Div. 10 line item break out on the bidding schedule (page 9 of 42, Addendum 0001). Please advise.

Response: Bid Schedule has bee revised.

33. Notes 2 and 4 on sheet C2 state that additive items 1A, 1B, and 4 are not to be included in the base bid. The bid schedule description for Bid Item 1 states to include Bid Additives 1,2,3, and 4. Please clarify what costs are to be included in Bid Item 1 and where we are to tabulate the costs for Bid Additives 1-4.

Response:Bid Schedule has been revised.

34. Is 12” ladder rack required for communications room?

Response: Ladder rack is not required.

35. Is basket tray required for cable pathway outside the communications room?

Response: Wire basket tray is not required.

36. Per telecommunications note on sheet E1 telecommunications it states that Government is doing terminations in communications room. Specs call for patch panels and patch cords and wire managers. Is the government providing Racks to mount equipment?

Response: The cable terminations and equipment rack have been revised to be provided and installed by the contractor. Refer to specification 27 15 00 and added specification 27 11 01.

37. On sheet E-3 it requests 12 strand SM OSP fiber. Is there any OSP copper required?

Response: Copper backbone is not required.

38. We are able to provide 1 ¾” standing seam panel using our roll forming equipment on site. Will the use of our roll forming equipment be an acceptable substitute to AEP design basis panel?

Response: Per the Preformed Roof Panel Spec 07 41 13, Section 2.3 Materials, Item D Fabrication, #2 notes that roofing panels shall be factory formed. Field formed panels are not acceptable.

39. Will the use of Sheffield coil and sheet steel be an acceptable substitute? We can meet UL 580 spec. Only 21 standard colors are available, not 22. If yes, please provide mfg. weather tightness warranty requirements.

Response: Per the Preformed Roof Panel Spec 07 41 13, Section 2.3 Materials, Item D Fabrication, #2 notes that roofing panels shall be factory formed. Field formed panels are not acceptable.

40. For the use of nail base insulation board we would like to sub Atlas for the Rmax. Atlas is a nail base manufacturer in Denver so product will be available quickly.

Response: Contractor to provide specific product information that indicates material is equivalent to the basis of design as substitution during construction for review and approval.

41. Wall Panels: We can closely match AEP design basis panels. Will the use of our roll forming equipment be an acceptable substitute?

Response: Per the Metal Wall Panel Spec 07 42 13, Section 2.5 Fabrication, Item A, Note 2. Panels should be “factory correctively-leveled”.

42. On bid item 2, it is unclear from the wording if the parking lot for the new buildings is to be included in Bid Item 1 or 2. Also, the description for Bid Item 1 includes roads and parking lot (the road is also called out in Bid Item 2).

Response: See revised bid schedule.

43. As a clarification grills in wall on M-5 are called out as 36x14, on sheet MY he same are shown 24x18, detail 4 - Which one of these items show correct dimensions Response: The grill sizes on sheet M-5 are correct. The grilles are 36x14.

44. Does exposed Spiral pipe in office 115 and Conference 112 need to be "spiralcoustic" line pipe? If not, does this require any insulation?

Response: Yes, provide acoustic lining where ductwork is exposed above occupied spaces.

45. On this project, it calls for polyisocyanurate to be used as the slab insulation. Polyiso cannot get wet otherwise it will completely disintegrate. What I’d suggest is using the attached substitute instead. This product was made to be used as below grade insulation and out performs all other insulations when it comes to water retention and R-value retention. Suggestion: Insulfoam R-Tech IV Response: Per the Thermal & Acoustical Insulation Spec 07 21 00, Section 2.1 Manufacturers, Item A, Note 1. lists approved manufacturers. Contractor to provide specific product information that indicates material meets the requirements noted in the spec for a sub-grade insulation as a substitution shop drawing submittal.

46. The spec given for Type E on page 931 (“Type E (pea gravel backfill): Crushed rock or gravel with 100 percent passing a 1/2-inch sieve and not more than 10 percent passing a Number 4 sieve”) is a very hard spec to make. Both our squeegee and #8 rock will not meet the max 10% passing the Number 4 sieve. Our #8 allows 10%-30% to pass the Number 4 sieve and the squeegee allows 85%-100% to pass the Number 4 sieve. Would one of these other types be acceptable?

Response: The #8 will be acceptable for the Type E material.

47. On the Class 6 Agg Base I do not see anything in the spec manual that says if it can be recycled concrete roadbase. Would Class 6 recycled concrete roadbase be ok for this project? CDOT Class 6 recycled concrete roadbase is used frequently with CDOT projects and often meets the Class 6 Roadbase specifications.

Response: Recycled concrete is acceptable for road base provided that it meets the gradation and other requirements of the specifications.

48. Is window J frame to be hollow metal (HM) or an anodized aluminum frame?

Response: HM – painted to match adjacent wall color

49. Please clarify the dimensions of window F; the schedule indicates 12’-10” X 8’-4” while the elevation indicates 18’-0” X 8’-3” Response: Dimensions drawn graphically are correct. The schedule should be updated to match the width as 18’-0” and height as 8’-3”

50. Please clarify the window type required for the window shown on the north elevation of the Administration Building at approximately 3 line. Both A1 and A are indicated.

Response: . A1

51. Regarding soap dispensers at the rest rooms; are some to be mounted below the counter top while others are wall mounted?.

Response: Soap dispensers shall be mounted below the counter.

52. Is there an enlarged floor plan for men’s restroom no. 155?

Response: See Sheet A-10

53. Does the smaller building also require devices connected to the fire panel?

Response: Yes, fire alarm devices and appliances are specified for both buildings. The fire alarm control panel shown in IT 119 will cover both buildings.

54. The ditches are listed and the coils will be two coils per ditch. What the loop lengths are for total length. I am assuming the loop lengths are calculated from the manifold inside the building to the field and back to the building again.

Response: The length is calculated from the manifold inside the building to the field (and including the loops in the field), and back to the building again. Calculate length based on this path, the spacing of the loops, and the diameters of the loops. This length will be different for every loo. Each loop (from manifold, to slinky, the slinky itself, back to the manifold) is approximately 1200 ft. This varies depending on the piping between the slinky and the manifold. The slinky portion is approximately 760 ft. .

55. What material is to be used for pipe bedding for the different types of piping? RESPONSE: Either sand (Type C) or pea gravel (Type E) can be used for pipe bedding.

56. What material is used for the pipe zone backfill? RESPONSE: Type A, C and E are all acceptable for pipe zone and the trench zone? Type A through G and Type I are allowable for trench zone. Can native material be used for either of these zones? Processed native material that meets the gradation requirements may be used for pipe zone, it is already allowed as Type I for trench zone.

57. Drawing C-23 references Type O bedding, per Specification 313000. However, the aggregate descriptions only go to Type N. What should be the correct aggregate type? RESPONSE: Type O material should be either sand (Type C) or pea gravel (Type E).