36C24219B0009-0003009.pdf

Request for Information

Project 561A4-CSI-139 Renovate Digital RF Room

1. Are the items on the “Equipment List” items 1-10 shown in the right hand corner of drawing

A301 to be furnished and installed by the VA?

a. Yes, these items are to be supplied and installed by the equipment vendor (GE).

2. Will all rooms in scope of work be unoccupied in order to perform HVAC work in ceilings and mechanical room or will this work have to be done off hours?

a. At a minimum, HVAC work in Rooms 56, 57, and 57A shall be completed during off hours, per Infection Control Note #1 on sheet ICRA1. Contractor shall coordinate phasing with facility, per General Notes #13, #14, and #16 on sheet G101.

3. Can you provide additional information regarding the routing of exhaust duct for HVAC? Once duct penetrates rm 57A wall, how high will duct extend? Provide section detail indicating height of duct to roof we are penetrating.

a. The Receiving Area show on drawing M103 is part of a 1-story addition to Bldg. 1, whereas, the roof of the addition is level with the second floor of Bldg. 1. The exhaust duct shall be routed thru the wall of 57A and directly up thru the roof of the receiving area; refer to detail F5 on sheet M502 for further details regarding the exhaust gooseneck. Contractor shall provide complete consolidated and coordinated shop drawings for all new systems, in accordance with specification section 230511.1.4.H.

4. There is no lighting schedule on the Electrical drawings shown. Based on what price of lighting package should be done.

a. Lighting fixture schedule has been added to revised drawings.

5. Equipment Electrical plan page E103 shows System cabinet but it doesn’t state who is providing it.

a. Systems cabinet shall be supplied and installed by the equipment vendor (GE).

6. On the same page is shown what panels are to be used for mechanical equipment and building 3 is mentioned, but there is no detail that shows location of the building 3, or approximate distance and/or how to route pipe to it. Will trenching be required or some other way is optional.

a. Bldg. 1 is physically attached to Bldg. 3 via a 1-story addition, and the main electrical distribution room for Bldg. 1 is located in the basement of Bldg. 3, which is unfinished/unoccupied. The routing of conduit will require one core drill through the first floor slab and the conduit shall be routed through the basement of Bldg. 1 to room

B004. The approximate worst-case length of the run is 275 ft.

7. General Electrical Note 7 mention Panel P-1 that is approximate location is not shown anywhere on the drawings. Also there is no any information on the panel itself. Will that panel require any spare breakers and what panel is going to be used for.

a. This note is no longer applicable and has been removed from the Rev. 2 drawings.

8. How and when contractor shall verify location and available capacity of main distribution panel.

9. Is there spare breaker for panel P-1.

a. See response to RFI #7.

10. On drawing ICRA1, its indicated that each entry will require an airlock to prevent migration of construction related debris. Will the airlocks be required to be constructed out of fire rated drywall, or fire rated plastic. Please advise

a. No, the existing walls in question are not fire rated, so fire rated airlocks shall not be required.

11. On drawing ICRA1, If the walls do not extend to the 2nd floor deck, are the walls required to be sealed to the deck above to prevent dust migration? Please advise

a. Yes, all construction barriers shall extend to the deck above.

12. On Drawing ICRA1, it is stated that the CT room and adjacent CT Control room will remain in service during construction. Please advise phasing and ICRA plan for installation of new ductwork on drawing M103.

a. See response to RFI #2.

13. On drawing E103, electrical panels PRL4B and EPDDH are located in building 3. Please advise location of panels and route of connection to corresponding panels.

a. See response to RFI #6.

14. On drawing E103, electrical panels PRL4B and EPDDH are located in building 3. Please advise location of panels and route of connection to corresponding panels.

a. See response to RFI #6.

15. On drawing A502 image F4, it is indicated GE is supplying the machine rails and struts. Is GE responsible for the installation of the rails and struts supplied by them?

a. Equipment vendor (GE) shall be responsible for the installation of all equipment vendor

(GE) supplied items, unless otherwise noted.

16. Project Documents calls for replacement of the existing BMS system. Please provide more information on the existing BMS system. Who is the control contractor of the existing system?

a. N/A – existing BMS shall remain and be tied into, per General Note #45 on sheet G101.

The existing controls contractor for Bldg. 1 is Innovative Controls.

17. Will the new system be standalone and not tied in to existing BMS?

a. The AHU shall be provided with a multipurpose, programmable, field installed, BACnet compatible controller. With respect to basis of design equipment depicted on drawings, this controller would be a Trane Tracer UC600 with appropriate expansion modules to receive a minimum of all points shown in the air handling unit points list on drawing

M602. Be advised that the contractor is responsible for all items listed on the responsibility table in specification section 230923.1.1.F.4, as well as hiring a control system integrator to perform their respective tasks, as described in the aforementioned table. The contractor shall provide a complete controls submittal reflecting shop level, point-to-point detail that captures the design intent depicted on the drawings and described in the specifications.

18. Will there be demo involved with the existing BMS system or this is a complete gut out. It's not clear on the documents provided.

a. See response to RFI #17.

19. What is the duration and target completion date of the project

a. 90 days from award date, this time can be adjusted pending delivery time of the equipment.

20. Will all of the work be performed on regular working hours or OT?

a. See response to RFI #2.

21. During site visit, we asked for the location for closet 38 (as per drawing E101) and were told to ask via RFI. Please provide a drawing showing the location of Closet 38 and distance from area of work.

a. See sheet A101 for location of Electrical Closet 38.

22. As per drawing E-102, please provide the location of existing Nurse Call system for new nurse call device tie-in.

a. It will go to the Nurse station located in that area.

23. As per Electrical drawing E101, Note 6, it calls for us to provide conduits but does not call for how many spare conduits and size of the conduit.

a. This a general note for any spare conduits that may be installed in the project. If no spare conduits are directly noted as required, no pull strings shall be required.

24. As per drawing E-101, Note 7 states "Contractor shall verify location and available capacity of

Main Distribution Panel." Please provide location and distance of the Panel P-1 in the Drawing from area of work. Also, please provide location of Existing Main Switchgear. At the site visit, we were told that we cannot access the Electrical room and couldn't see how far it is from the area of work.

a. See response to RFI #7.

25. Also, we could not confirm the available capacity of the main distribution panel. Please confirm/provide available capacity of the main distribution panel.

a. See response to RFI #7.

26. As per drawing E-103, the New AHU-1 / DX-1 / DEF-1 to get power from Panel EPDDH in BLDG 3.

Please provide drawing showing location of the Panel EPDDH and how far is it from the area of work. At the site visit, we were told to send RFI and we were not able to see the location.

a. See response to RFI #6.

27. As per drawing M-103, it does not show thermostats location for new VAV's. Please provide drawing.

a. See revised drawings for thermostat locations

28. The Drawings do not show all conduit sizing and cable/wiring. Please provide them so we can provide prices accordingly.

a. See response to RFI #23.

29. Mechanical Demolition Drawings do not show demolition of existing ductwork. However, as per site visit, there are existing ductwork with supply and return diffusers in the area of work. In addition, Drawing M-103, shows all new ductwork. Please confirm if the existing ductwork is to remain.

a. All existing ductwork serving project area shall be demolished and capped at the nearest main.

30. If the existing ductwork is to remain, there will be no room above ceiling to install new ductwork. please provide more info.

a. See response to RFI #29.

31. Is there any known asbestos in proposed work areas

a. Contractor shall assume the presence of asbestos containing material (ACM) on the insulation of the steam piping throughout the project area. Any pipe insulation to be modified/demolished shall be abated of the ACM in accordance with specification section 02 82 11 and the Asbestos Abatement Notes on sheet M001.

32. Location of main electrical panel

a. See response to RFI #7.

33. Section 1.3, Item III - Location of steam line and accessibility. Do we need to cut/cap line at main? What is route to access the line

a. Yes, steam lines shall be cut and capped at the main in the basement; stairwell 62 shall be used for basement access.

34. Can we vent the HEPA exhaust fans through a window

a. Yes, HEPA fan can be vented through a window.

35. If HEPA exhaust fan needs to be vented through roof, what is route and how far

a. N/A – see response to RFI #34.

36. Location of data closet and fire alarm panels

a. Fire alarm panel located on first floor need elevator. Data closet located on second floor near elevator.

37. Will contractor need to use VA contracted fire alarm company for material, installation or final connections

a. No

38. Is a certified safety professional required for this project

a. The requirement for a Certified Safety Professional is based on contractor experience;

refer to specification section 01 35 26.1.8 for further explanation.

39. Will off hours work be allowed or required for Rooms 56, 57 and 58

a. See response to RFI #2.

40. Section 1.6/A. – Where is approved storage area

a. Storage area shall be in shared contractor yard, 500ft west of building 10.

41. Section 1.26/E – Do we need to include installation of x-ray equipment and installation engineer to oversee this work

a. The referenced specification section is for relocated X-ray equipment – this requirement is not applicable for this project.

42. Section 1.27/A – Does this storage area need to be provided and where is it located

a. See response to RFI #40.

43. Section 1.28/A – Will construction signs be required for this project

a. Yes, coordinate location with VA resident engineer.

44. Section 1.30 – Will professional photographic documentation be required for this project.

a. Photographic documentation shall be provided as outlined in Specification section 1.30.

45. Please, confirm with Engineer the position of AHU because TRANE’s Rep informed us that it is usually considered as a horizontal hanging unit.

a. The unit selected as the basis of design equipment is a vertical, floor mounted, air handling unit.

46. Is any existing BMS in that building we have to tie in our Controls?

a. See response to RFI #16.

47. If it is, please provide with contact information. Or will this be standalone controls? Please, advise

a. See response to RFI #16.

48. While our walk thru –there was a concern regarding position of existing sprinklers on the corridor ceiling. Based on dwgs. M-103.00 there are may not be enough space for those existing sprinklers and proposed, running parallel, return duct 35” x 12”.

a. The existing fire protection branch piping may be required to be relocated within the interstitial space to allow for the installation of the new ductwork. Contractor shall provide complete consolidated and coordinated shop drawings for all new systems, in accordance with specification section 230511.1.4.H.

49. Dwg. M-103.00 has few round duct, like : dia. 22”, 18”, 14”, 12”,8”. Are those just round ducts or spiral ducts?

a. All round ducts shall be plain round with a longitudinal seam.

50. Dwg. M-103.00 and det A2, for TRANE Condensing unit and on dwg. M-502.00 have different diameters for liquid and gas pipes. Please, advise which ones are correct.

a. The sizes shown on drawing M-103 are correct – detail A2 has been revised to show the correct sizes.

51. Does acoustical duct lining required at any portion of ductwork?

a. No acoustical duct lining is required.

52. It is not clear in spec. section 23 07 11 exactly name of insulation material and when (for what type of ductwork, like supply, outside air, or return air and its location: like exposed or not ) ducts supposed to be insulated. Please, clarify

a. All ductwork under this project shall be considered to be located within “Unconditioned

Space” according to ASHRAE 90.1. All supply ductwork shall be provided with a minimum R-value of R-3.5; return and exhaust ductwork do not require any insulation.

Insulation material for supply shall be in compliance with one of the approved options provided in specification section 23 07 11.

53. It is not clear in spec. section 23 07 11 what exactly insulation material for indoor and outdoor refrigeration piping and indoor condensate drain piping and steam piping should be used.

Please, clarify

a. Refer to insulation thickness schedule at the end of specification section 23 07 11. All insulation materials listed in the schedule shall be considered approved types of insulation for the appropriate system classification.

54. Are AF, PF-1 & PF-2 filters part of AHU unit? –or we have to buy them separately? Please, advise.

a. Filters PF-1 and PF-2 are integral to the air handling unit; filter AF is additional and shall be provided and installed separately.

55. Filters Schedule and Det. E-6 on dwg. M-601.00 shows AF filter as MERV 14. However, dwg. M-

101., Det. E-1 dwgs. M-602.00, det. D9 –shows it as MERV 13 Please, clarify which one is correct.

a. Filter AF shall be MERV 14 – drawings M-101 and M-602 have been updated accordingly.

56. Also –Filters’ schedule on dwg. M-601.00 does not provide thickness of filters. It is not clear what does it mean column named Number 24” x24” Modules. Please, provide thickness of filters and explanation of that column.

a. The Air Handler Filter Schedule has been edited to remove unnecessary information.

Filter thickness is dependent on manufacturer and shall be selected to meet the static pressure requirements set forth in the Air Handler Filter Schedule.

57. Schedule for Return/Relief DRRLD-1, 2 & 3 and Supply air dampers DSPD -1 & 2 on dwgs. M-

601.00 have no model #, no manufacturers. Please, advise

a. Refer to specification section 23 09 23.2.14.C for damper selection criteria.

58. Schedule for Relief Air Damper RLD system -001, Ruskin model M-35, has very small diameter.

Please review if it’s correct size.

a. Minimum damper size shall be 8”x6” – schedule has been updated in revised drawings.

59. Are all dampers just motorized damper? Are any Fire dampers or Fire Smoke Dampers required for this project? Please, advise

a. No fire or smoke dampers are required for this project.

60. Schedule Dwg. M-601.0 does not have schedule for air-outlets, like SDs and EGs (Supply

Diffusers and Return Registers) Please provide model # and manufacturer.

a. Air terminal schedule has been added to the revised drawings with basis of design manufacturer and model numbers.

61. Would Engineer accept Daikin instead of TRANE unit?

a. All equipment shown on the drawings is for basis of design purposes only. Contractor may submit any equipment that he/she feels meets the project specifications.

62. Dwg. M-103.00 does not have layout of condensate drain from AHU. Please let us know where we have to take that drain pipe.

a. The condensate drain is shown on plumbing drawings (P101).

63. Please specify exact location for outdoor condensing unit

a. The location shown on drawing M103 has been identified by the engineer of record and the VA Resident Engineer as the most viable location for the condensing unit. Contractor shall verify manufacturer recommended service clearances and final location in the field, per note 11 on sheet M103.

64. Please provide conditions to bring our AHU into the building

a. Provide COR with 5 day prior notice to AHU’s arrival and installation, so radiology staff can be informed and adjust their schedules.

65. Dwg. M-103.00 shows Toilet exhaust duct riser coming to the roof from ground floor thru floors above. However, no roof plan, no plans of other floors and no building elevation were provided.

a. See response to RFI #3.

66. Please, provide roof plan showing position of toilet exhaust goose neck, plans of other floors above (if it’s necessary to avoid not shown obstacles), and building elevation. This way we will have necessary information for our duct shop drawings.

a. See response to RFI #3.

67. Do we have provide as- built duct drawings, or providing duct shop drawings will be enough?

a. Contractor shall provide shop drawings.

68. Is the project Phased? When is expected to start?

a. See response to RFI #19.

69. What are working hours for demolition and installation of steam piping?

a. See response to RFI #2.

70. What are working hours for installation of new ducts and steam duct coil?

a. See response to RFI #2.

71. P101 calls for new 02 line to be installed but it doesn’t show what size and we can’t find a spec on the material to be used.

a. Sheet P101 has been updated to provide size of O2 pipe.

72. Did not see a fixture schedule, please provide the name of the fire alarm system vendor.

a. See response to RFI #4 for fixture schedule and RFI #37 for alarm system vendor.

73. Is there a target GPM and Btu for the VAV’s

a. N/A – there are no modifications to any hydronic heating systems required under this contract.

74. Can you provide any details on the existing hot water supply and return system

a. See response to RFI #73.

75. Note #10 mentions a drawing M500 but this drawing does not exist

a. Concur, the referenced note is not applicable and has been removed from the Revision

2 drawings.

76. There is no option or specification for new steam radiators per note #10

a. See response to RFI #75