RFI Responses Part 3.pdf

PreBid RFIs - VADA 8th Floor Bidder RFI Page / Sht Discipline AE Response Sent to VA? Revision/Exhibit

Required?

1. On Sheet 2-EP-6.5, the Feeder Branch circuit schedule calls out tag numbers R33, R54, R224, R404, and RT1604 but these tags cannot be located in the drawings for either location or distance. Please clarify the locations and distances of these tags.

RE: Attachments Q1 A Pages from 549-20-222- ISSUEFORBID_Drawings_Elec , Q1B 1994 B2 Correct Elec Defic Ph2 2-E22 Riser - Copy , Q1 C 1994 B2 Correct Elec Defic Ph2 2-E17 Room 107A Markup 01222021 :

The feeder schedule indicated represented an existing condition that needed to be verified. It illustrates feeders in an unrelated portion of the one-line and should be considered existing conditions in unrelated portions of the one-line diagram. Additionally there are installation references indicated by ETD, ETR , EG that by line weight indicate inclusion in the project scope of work. These scopes were performed on a previous project and are considered existing conditions.

RE: Photos 20230802_103037, 103047, 103051, 103054, 103056.

2. This question was previously asked but we need further clarification that details sizes, locations, ratings and material specification for the access panels -"On Sheet 2-AI-5.1, under the General Ceiling Plan Notes (Note "E") states to coordinate all Access Panel locations, sizes, and finishes with Architect. The schedule of finishes does not specify the access panels. Please provide information on all access panel sizes, locations, and finishes."

Access panels should be located wherever access is required to reach a concealed HVAC, Mechanical, or Plumbing component installed behind a wall or above a hard ceiling. The panels should be sized as required for servicing such concealed equipment. The panels should have finish dependent on their location: for areas of high moisture(i.e. bathrooms) the panels should have stainless steel finish, in areas not prone to high moisture the panels should be primed steel for painting to match the surrounding area.

3. Please provide the existing floor to deck height in the space or as-built drawings that show this dimension As-built drawings were provided per SH request, these as-builts contain the necessary architectural and/or structural drawings that define the floor to deck height. Contractor shall field verify this height to prevent issue if there is a deviation from the as-builts.

4 4.Please provide all complete as-built drawings for 7th, 8th, and 9th floors as stated as previously asked in the RFI's (1st round) so that we will be able to properly price the project for the VA. Addressed. per SH. All of the As-Builts were provided comprehensively

5. The RFI response did not properly address this RFI request - "Please provide an infill detail for the radiatior locations at the perimeter walls throughout the space." The Bid Document details referenced in the response do not speak to the radiator locations. Please re-review the response.

The exterior detail is attached for where the louvres or similar exterior wall openings such as doors and windows are removed

6. Please identify the area(s)that are being served by the existing AHU 12 which is being replaced with the new Air Handler being installed on the roof and provide Mechanical as-builts showing the air distribution for that space. Please Note the existing AHU designations shown on sheet 2-MD-1.1 (AC-12 & AC-30) are reversed based on equipment labels observed at the site visit.

Addressed per SH, OEI to confirm. RE: Attachment Q4 Response to 8th Floor Inpatient As-Builts and RFI. The area served by AC-12 and AC-30 are described in the Mechanical Sections of the Design Analysis. The location of AC-12 and AC-30 in the mechanical room in the design analysis reflects the equipment labels observed at the site visit. Please see following pages 2-4 in the attachment.

7. This RFI was previously asked in the first round of RFIs - Per detail 3 on Sheet 2-AI-2.7, please confirm that this is not an applicable to this condition to the following statement - Provide an Architectual wall infill detail where louvers are to be removed as reference on Keynote #11 on Sheet 2-MD-1.1

The exterior detail is attached for where the louvres or similar exterior wall openings such as doors and windows are removed. The contractor shall take care to evaluate the existing wall structure, following louvre removal, to ensure the infill matches closely the existing wall components. If a deviation in the existing wall structure is found, the contractor shall photograph the wall opening and its components and provide to the architect for review and feedback.

8. This RFI was previously asked in first round. The following locations are necessary to provide proper pricing to the VA.

Please provide plans and identify locations where new special systems are to be fed from services located outside of the immediate work area for this project. This item is generally referenced in the Key Notes on Sheet 2-ET-1.1C.

OEI to reference three (3) Spec Sections for Telco and Elec. SH to confirm installation scope with Ms. Tanisha Gordon.

RE: Sheet 2-ET-1.1C. The intent of the project scope of work is for this contractor to install raceway systems to from device to Telco rooms on the 8th floor. It is our understanding that low voltage system infrastructure will be installed by others to demarcations in the Communications Room (8C-303) located within the construction footprint. For other low voltage systems included in Contractors scope of work, coordination with existing conditions, other trades, and VA Project Representatives is required.

RE: Specification Section 270511- REQUIREMENTS FOR

COMMUNICATIONS INSTALLATIONS:

Paragraph 1.1 Description Paragraph 1.6 Administrative Requirements Paragraph 3.1 Preparation Paragraph 3.2 Installation Paragraph 3.6 Field Quality Control RE: Specification Section 270533- RACEWAYS AND BOXES FOR

COMMUNICATIONS SYSTEMS:

Paragraph 1.1 Description Paragraph 3.1 Equipment Installation and Requirements

9. Please provide the electrical as-built drawings as previously stated in the 1st round of RFIs so that we will be able to properly price the project for the VA.

OEI to flag electrical drawings indicating switchboard scope as is available.

LRL explained that it was a field survey effort. There were gaps in the drawing set. RE: Attachments Q9 A 1994 B2 Correct Elec Defic Ph3 2-E20 , Q9 B 1994 B2 Correct Elec Defic Ph2 2-E20 Basement Switchgear and Attachments Q1 A Pages from 549-20-222-ISSUEFORBID_Drawings_Elec , Q1B 1994 B2 Correct Elec Defic Ph2 2-E22 Riser - Copy , Q1 C 1994 B2 Correct Elec Defic Ph2 2-E17 Room 107A Markup 01222021.

Page 1 of 1Exported on July 30, 2024 10:08:42 AM CDT

PANEL

D2CH8A

AMPS DESCRIPTION

R33

30A

30A

R224 225A

TAG

R404 400A

ETR N/A EXISTING TO REMAIN

ETD N/A EXISTING TO DEMO

EG GND EXISTING GROUND TO REMAIN

REPLACE (4) 500KCMIL, (1)#3G IN EXISTING 3-1/2"C

REPLACE (4) #4/0, (1)#4G, IN EXISTING 2-1/2"C

REPLACE (3) #10, (1)#10G, IN EXISTING 3/4"C

REPLACE (3) #10, (1)#10G, IN EXISTING 1/2"C

FEEDER/BRANCH CIRCUIT SCHEDULE

NOTE: ALL CONDUCTOR SIZES ARE BASED ON 75 DEGREE C RATED TERMINATION AND

COPPER CONDUCTORS WITH TYPE WHHN/THWN-2 INSULATION. FOR TERMINATION OR

INSULATION TYPES RATED LESS THAN 75 DEGREE C, MODIFY SIZES ACCORDING TO NFPA 70.

R54 50A REPLACE (4) #6, (1)#10G, IN EXISTING 1"C

RT1604 1600A REPLACE (4) SETS OF (4) 500KCMIL, (1)#1/0 G IN EXISTING 3"C

800AF

800AT

3P

1200AF

1000AT

3P

1200AF

1200AT

3P

1600AF

800AT

3P

SPARE

1200AF

1000AT

3P

P

CTB

PANEL 8JH

225 AMP

225 MCB

600AF

300AT

3P

225AF

225AT

3P

600AF

400AT

3P

DISTRIBUTION PANEL 'DHES'

480/277 VOLT, 3 PHASE, 4 WIRE WITH 100% GROUND,

600 AMP BUS, 35,000 AIC.

P

CTB

PANEL

8JHES

100 AMP

100 MCB

225AF

225AT

3P

1200AF

1000AT

3P

PANEL

8JLES

100 AMP

100 MCB

8JTES

30KVA

480V-208Y/120V

3Ø, 4W

225AF

225AT

3P

1200AF

1000AT

3P

DISTRIBUTION PANEL '2-HEQ'

480/277 VOLT, 3 PHASE, 4 WIRE WITH 100% GROUND,

1200 AMP BUS, 35,000 AIC.

DISTRIBUTION PANEL '2-HEC'

480/277 VOLT, 3 PHASE, 4 WIRE WITH 100% GROUND,

1200 AMP BUS, 35,000 AIC.

ATS8

800A.

(EQ)

ATS7

800A.

(EQ)

1000AF

1000AT

3P

P

CTB

PANEL D8JL

225 AMP

225 MCB

PANEL

8JL1

225 AMP

225 MCB

PANEL

8JL2

225 AMP

225 MCB

PANEL

8JL3

225 AMP

225 MCB

PANEL

8JL4

225 AMP

225 MCB

PANEL

9JLES

100 AMP

100 MCB

600AF

400AT

3P

1200AF

1200AT

3P

600AF

400AT

3P

P

CTB

DTEC

300KVA

480V-208Y/120V

3Ø, 4W

CRITICAL DIST PANEL 'DLEC'

208/120 VOLT, 3 PHASE, 4 WIRE WITH 100% GROUND,

1200 AMP BUS, 22,000 AIC.

PANEL

8JLEC-1

225 AMP

225 MCB

PANEL

8JLEC-2

225 AMP

225 MCB

PANEL

8JLEC-3

225 AMP

225 MCB

400AF

400AT

3P

P

CTB

P

CTB

PANEL

D8JHEQ

225 AMP

225 MCB

PANEL 8JLEQ

225 AMP

225 MCB

P

CTB

PANEL 8KH

1200 AMP

1200 MCB

P

CTB

PANEL 8MH

1200 AMP

1200 MCB

TO PT-2A

1200AF

1000AT

3P

P

CTB

PANEL 8JHEC

250 AMP

250 MCB

P

CTB

PANEL D8KL

225 AMP

225 MCB

1000AF

1000AT

3P

PANEL

8KL1

225 AMP

225 MCB

PANEL

8KL2

225 AMP

225 MCB

PANEL

8KHES

100 AMP

100 MCB

PANEL

8KLES

100 AMP

100 MCB

8KTES

30KVA

480V-208Y/120V

3Ø, 4W

PANEL

9KLES

100 AMP

100 MCB

225AF

225AT

3P

P

CTB

400AF

225AT

3P

P

CTB

PANEL

8MHES

100 AMP

100 MCB

PANEL

8MLES

100 AMP

100 MCB

8MTES

30KVA

480V-208Y/120V

3Ø, 4W

PANEL

9MLES

100 AMP

100 MCB

1000AF

1000AT

3P

P

CTB

PANEL D8ML

1000 AMP

1000 MCB

PANEL

8ML1

225 AMP

225 MCB

PANEL

8ML2

225 AMP

225 MCB

225AF

225AT

3P

P

CTB

PANEL 8KHEC

250 AMP

250 MCB

600AF

400AT

3P

PANEL

D8KLEC

X600 AMP

X600 MCB

PANEL

8KLEC1

225 AMP

225 MCB

PANEL

8KLEC2

225 AMP

225 MCB

P

CTB

600AF

400AT

3P

P

CTB

PANEL

D8MLEC

X600 AMP

X600 MCB

PANEL

8MLEC1

225 AMP

225 MCB

PANEL

8MLEC2

225 AMP

225 MCB

400AF

400AT

3P

P

CTB

PANEL 8KLEQ

225 AMP

225 MCB

400AF

400AT

3P

P

CTB

PANEL 8MLEQ

225 AMP

225 MCB

225AF

225AT

3P

P

CTB

PANEL 8MHEC

250 AMP

250 MCB

225AF

225AT

3P

P

CTB

PANEL

D8KHEQ

225 AMP

225 MCB

225AF

225AT

3P

P

CTB

PANEL

D8MHEQ

225 AMP

225 MCB

PT-2B

750KVA

M.C.B

3000 AF

3000 AT

SWITCHBOARD '2A'

120/208 VOLT, 3 PHASE, 4 WIRE, 3000 AMP

SWITCHBOARD '2B'

120/208 VOLT, 3 PHASE, 4 WIRE, 3000 AMP

ATSES 400A.

PT-2C

750KVA

M.C.B

3000 AF

3000 AT

SWITCHBOARD 'K'

480/277 VOLT, 3 PHASE, 4 WIRE WITH 100% GROUND,

3000 AMP BUS, 50,000 AIC.

PS-2A

TO PS-2B

PS-2F PT-2F

3000AF

2000AT

NORMAL DISTRIBUTION SWITCHBOARD

IN BASEMENT, ROOM A13.

600AF

400AT

3P

1200AF

1200AT

3P

DTEQ

300KVA

480V-208Y/120V

3Ø, 4W

EQUIPMENT DIST PANEL 'DLEQ'

208/120 VOLT, 3 PHASE, 4 WIRE WITH 100% GROUND,

1200 AMP BUS, 22,000 AIC.

G

1500 KVA

13,200V PRIMARY

SECONDARY 480V/277V

G

EXISTING

EMERGENCY DISTRIBUTION SWITCHBOARD ,

NEMA 1 ENCLOSURE

1600A 480/277V/3PH

E

TD

E

TD

ETD

ETD

480Y/277V,3Ø, 4W

EXISTING 1000KW

EMERGENCY GENSET

EXISTING CIRCUIT BREAKER

FOR MOBILE LOAD BANK

400AF

400AT

3P

1 100AF

100AT

3P

2 1600AF

1600AT

3P

(4 ) 5

K

C M

L

(4

2A W

G

GF-ALARM

1600A/3P

1600A/3P

GF-ALARM

N

G

#3/0

E

TD

100AF

100AT

3P

(4

2A W

G

E G

E G

E G

E G

E G

E G

1000AF

1000AT

3P

PANEL

7A

XXX AMP

XXX MCB

PANEL

8A

225 AMP

225 MCB

PANEL

8AA

225 AMP

225 MCB

1200AF

1200AT

3P

600AF

600AT

3P

PT4A

1500KVA

DISTRIBUTION SWGR 'D2HBC'

ATS-4C

(CRITICAL

LOADS)

T4CLBA

15KVA

PANEL

4CLBA

PANEL

D2CHBA

225AF

225AT

3P

XXXXAF

XXXXAT

3P

DISTRIBUTION PANEL 'D2CHBA'

480/277 VOLT, 3 PHASE, 4 WIRE WITH 100% GROUND,

XXXX AMP BUS, 35,000 AIC.

TD2CL8A

112.5 KVA

PANEL

D2CL8A

PS-4A

PANEL

8JLEC-1B

60 AMP

60 MCB

PANEL

8JLEC-1C

60 AMP

60 MCB

PANEL

8JLEC-3B

60 AMP

60 MCB

PANEL

8JLEC-3C

60 AMP

60 MCB

P

CTB

TO

GENERATOR

100AF

100AT

3P

TO ATS - 4C

CRITICAL LOADS

Project Number

Building Number

Drawing Number

Project Title

Location

Issue Date Checked Drawn

Drawing Title

Approved:

VA FORM 08 - 6231

A

100% FINAL CHECKSET

FULLY SPRINKLERED

Office of Construction and Facilities Management

U.S. Department of Veterans Affairs

B

C

D

E

F

A

B

C

D

E

F

21 4 5 6 7 8 9 10

Phase

ARCHITECT/ENGINEER OF RECORD

A/E:

STAMPCONSULTANT

321 4 5 6 7 8 9 10

Engineering

B

IM

/V

A D

A

T H

F L

O O

R /0

.0

V

A D

A th F lo o r-

E L

E C

R

.r vt

/1

/2

:5

:4

A

M

2-EP-6.5

ELECTRICAL REVISED RISER

O'Brien Engineering, Inc., Managing Partner

2340 E. Trinity Mills Rd. Ste 220

Carrollton, TX 75006

972-233-2288 www.obrieneng.com

O'Brien Engineering, Inc.

2340 E. Trinity Mills Rd Ste 220

Carrollton, TX 75006

972-233-2288 www.obrieneng.com

RENOVATE MEDICAL INPATIENT

UNIT FOR PATIENT PRIVACY &

COVID-19

DALLAS, TEXAS

549-20-222

Mr. Alex Muller-Poitevien, COR

11/04/22 LRL JRM

OEI-LBL Joint Venture LLC

6" = 1'-0"

SINGLE LINE DIAGRAM

Revisions: Date:

100% CONSTRUCTION DOCUMENTS 11/04/2022

11/04/2022

ISSUE FOR BID

LLaMette Text Box R33, R54, R224, R404, and RT1604

LLaMette Engineer

LLaMette Cloud+ Delete

LLaMette Engineer

LLaMette Cloud+ Confirm if existing

LLaMette Engineer

LLaMette Cloud+ Existing Conditions

LLaMette Engineer

LLaMette Cloud+ Existing Conditions

LLaMette Engineer

LLaMette Cloud+

600AF, 400AT

LLaMette Engineer

LLaMette Cloud+ 8th Floor Panels tmueck Pen o tmueck Callout Actually 2 panels. 8JL-1 and 8JL-2 tmueck Callout Actually 2 panels. 8JLEC-1 and 8JLEC-2 tmueck Callout

8JHEC

tmueck Callout

8JHEQ

tmueck Pen a tmueck Callout

8JLEQ

HZhang Text Box

RFI :

6. Please identify the area(s)that are being served by the existing AHU 12 which is being replaced with the new Air Handler being installed on the roof and provide Mechanical as-builts showing the air distribution for that space. Please Note the existing AHU designations shown on sheet 2-MD-1.1 (AC-12 & AC-30) are reversed based on equipment labels observed at the site visit

Response:

The area served by AC-12 and AC-30 are described in mechanical design analysis. The location of AC-12 and AC-30 in the mechanical room in the design analysis reflects the equipment labels observed at the site visit. please see following pages 2~4 in this document for your reference.

Text Box

Renovate Dallas Medical Inpatient Unit for Patient Recovery & COVID-19 ISSUE FOR BID Design Analysis isolation fan on roof, pumps, steam piping and valves, and other mechanical equipment. Existing AHU-30 currently serves the 8C-200 wing, while AHU- 12 serves the basement 1st, 5th, and 9th floors. Refer to Figure 4.5 for the location of the existing mechanical room.

FIGURE 4.5 – Existing and Proposed Mechanical Spaces

4.6 HVAC Design Aspects

The existing 8th floor is currently occupied as mainly office and support spaces. The renovation of the 8th floor will require a different allocation of spaces to include nurse stations, patient rooms, isolation rooms, and other patient support spaces.

4.6.1 VA Space Planning

As part of the statement of work, the design of the AHU unit for the 8th floor was originally supposed to provide cooling for all four wings, including the 8C-400 wing. This new unit would be located in the space behind the existing elevators, approximately 1150 SF. After discussing with the manufacturer, Temtrol, a maximum capacity of 28,000 CFM could be provided by a unit that fits inside this space. Refer to Figure 4.5 for the locations of the existing and proposed mechanical spaces. Based on this design limitation, two options were provided at the Pre-35% Design Meeting with the VA on 02 October 2020:

HZhang Highlight Existing AHU-30 currently serves the 8C-200 wing, while AHU-

HZhang Highlight 12 serves the basement 1st, 5th, and 9th floors.

HZhang Highlight

Highlight

HZhang Highlight

HZhang Highlight

HZhang Highlight

HZhang Highlight

HZhang Highlight

HZhang Highlight

HZhang Highlight

HZhang Highlight

HZhang Highlight

HZhang Highlight

HZhang Highlight

EXISTING CONSTRUCTION

NEW MASONRY,

MATCH EXISTING.

MASONRY TIES

@ 16" O.C.E.W.

WEEPS @ 16"

THROUGH WALL

METAL FLASHING

EXISTING CONSTRUCTION

4" CMU BLOCK TO FILL HOLE

EMULSION DAMPPROOFING WRAP

AROUND OPENING JAMBS

MATCH FINISH WITH ADJACENT

WALL

+/- 2" AIR SPACE.

MASONRY HOLE FILL-IN SHOULD BE TOOTHED INTO THE MASONRY PATTERN, TO MATCH EXISTING. (TYP.)

NOTE:

2" RIGID FOAM

INSULATION

FINISHED FLOOR

NEW STUD WALL

EXISTING FOAM INSULATION

EXISTING FOAM INSULATION

BATT INSULATION

WALL

EXISTING

WALL

EXISTING

A

LI

G N

A

LI

G N

MORTAR MESH

1 1/2" = 1'-0"

TYPICAL HOLE FILL-IN AT MASONRY

0'-1 1/2"

1"

EMULSION DAMPPROOFING WRAP

AROUND OPENING JAMBS

A

LI

G N

A

LI

G N

5/8" TYPE X GYPSUM ON 7/8"

FURRING CHANNELS @ 16" O.C.

8" CMU BLOCK

ajacobs Rectangle ajacobs Snapshot ajacobs Polygon ajacobs Polygon ajacobs Line