11-Design Narrative.pdf

23-1FC01327 | BEN TAUB HOSPITAL GREEN

ELEVATOR MODERNIZATION

08/09/2023

100% SUBMISSION | DESIGN BINDER

BEN TAUB HOSPITAL

TABLE OF CONTENTS

PART 1- A&E DESIGN NARRATIVE

ARCHITECTURE

MECHANICAL

ELECTRICAL

23-1FC01327 | BEN TAUB HOSPITAL GREEN ELEVATOR

MODERNIZATION

DESIGN NARRATIVE- ARCHITECTURE

HARRIS HEALTH PROJECT NUMBER

PROJECT NAME

23-1FC01327

Ben Taub Green Elevator Modernization

SUBMITTAL 100% Construction Documents SUBJECT Architectural Narrative

Architecture 1

Project Overview and Background

Ben Taub Hospital is a public hospital, located in Houston TX within the Texas Medical Center, is owned and operated by the Harris Health System. The original building was opened in May

1963. Currently the hospital has 402 licensed beds. This hospital has one of the busiest trauma centers in the U.S. and is the only hospital in Houston with a psychiatric emergency department open 24 hours a day.

The project scope for this is to modernize the Green Elevators (a 6-bank) in Ben Taub

Hospital. These are elevators #7, #8, #9, #10, #11, and #12. Renovations shall include new motors, hoist cables, control cable, governors, roller guides, emergency stop switches (as required), elevator controls, lobby floor indicators/lanterns, lobby call stations, cab primary control panel, cab auxiliary control panel, cab floor indicators, cab lighting, and cab flooring.

Only the existing elevator car frame and guide rails are to remain. Note – the above list is not meant to be all inclusive of the various elevator parts requiring replacement.

This project will be registered with the Texas Department of Licensing & Regulations under the

Elimination of Architectural Barriers section and the design team will follow the 2012 Texas

Accessibility Standards. A Registered Accessibility Specialist will conduct a plan review, inspection, and will file all required paperwork with the State to ensure compliance.

A Minor Application will be submitted to the Texas Health and Human Services – Architectural

Review. Per section 8.8.1 Minor Application, is a small project in an existing facility, with a current facility license, that has no significant changes to physical facility. It may have significant changes to the mechanical, electrical, plumbing, or piped medical systems at the department’s discretion. It has not substantial change in function operation. As listed on page

22 of 37 from the Application Instructions: ARU-21, replacing [an] elevator, is an example of a

Minor Application.

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Ben Taub Green Elevator Modernization

SUBMITTAL 100% Construction Documents SUBJECT Architectural Narrative

Architecture 2

Elevator Lobbies

There are 7 Elevator Lobbies, floors Basement to 6th Floor that are within the scope and will have some limited minor renovation as part of this project. That would be the lobby floor indicators/lanterns, lobby call stations, and card reader. Finishes to existing lobbies will need to be protected by the general contractor and will be noted on the drawings. Touch up paint to match existing will be the only finish applied to the Elevator Lobbies. Each elevator lobby will be shown in the construction drawings to identify items to be removed and items to be new.

Elevator Cabs

There are 6 Elevator Cabs that will need to be renovated as they are currently in poor condition, due to the age and the amount of usage that these elevators endure on a daily basis. Elevator cabs to receive new flooring, wall paneling, ceilings, and lights. Elevator doors also appear to be in poor condition and should be replaced. A digital design package of finishes to be presented to the owner in the next submission.

Elevator Penthouse

The Elevator Penthouse, located on the roof level, is also within scope as there are several major equipment items that will be replaced. Finishes will remain unchanged in this room.

Existing suspend lighting will be replaced with new light fixtures.

Occupancy & Classifications

This building is classified as I-2 per the International Building Code. This project has no changes to occupancy or construction type.

Construction Phasing

Unless otherwise stated in the contract document, Contractor shall be allowed only one elevator bank (existing group of three elevators) to be ‘under construction’ at any time throughout the construction upgrade period. Additional restrictions will apply in regards to interim elevator maintenance as detailed in the ‘Interim Maintenance Terms & Conditions’ document.

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DESIGN NARRATIVE- MECHANICAL

VA PROJECT NUMBER

23-1FC01327

Ben Taub Green Elevator Modernization

SUBMITTAL 100% Construction Documents SUBJECT HVAC Design Narrative

Heating, Ventilating, and Air Conditioning 1

HVAC Project Overview

Ben Taub Hospital is a public hospital, located in Houston TX within the Texas Medical Center, is owned, and operated by the Harris Health System. The project scope is to modernize the Green Elevators group (a 6-bank) in Ben Taub Hospital. This 6-bank elevator group includes #7, #8, #9, #10, #11, and #12. The elevator equipment to be replaced impacting the existing HVAC system shall include the motors and elevator control cabinets located up at the elevator penthouse on the roof level.

Existing system description

The existing HVAC system serving the elevator equipment room includes a single vertical Liebert System 3 air handling unit (AHU) labeled ACU-P-1. The unit utilizes chilled water for cooling only and provides approximately 20-tons of cooling with 5900-cfm of air flow. The electrical connection for the unit is fed from EHMA 20, 22, 24.

Selective Demolition

The existing air handler ACU-P-1 will be demolished to be replaced with a new unit. Demolition shall include some of the chilled water piping to allow the installation of new valving and controls.

Proposed System Description

A new vertical air handler style computer room air with chilled water cooling and easy filter access will be installed at the same location of the existing AHU after it is demolished. New chilled water piping, valves and controls devices will be added to be integrated with the existing DDC system. This unit may also be split into two 50% load units for redundancy.

Consideration of a part-load, redundant, split-system cooling-only unit in the event of chilled water or AHU failure. Another option would be including a 50% to 100% split DX cooling system to serve as backup to the chilled water unit. This unit would be on emergency power.

Phasing

Project phasing shall comply with description noted above under architectural summary.

Commissioning

The system will be commissioned subject to the requirement of Section 0191 00 General Commissioning Requirements.

Testing, Adjusting, and Balancing for HVAC

• Pre-testing is not required for this project.

• Final testing of systems will be performed and reviewed during the commissioning functional performance testing of the systems.

VA PROJECT NUMBER

23-1FC01327

Ben Taub Green Elevator Modernization

SUBMITTAL 100% Construction Documents SUBJECT HVAC Design Narrative

Heating, Ventilating, and Air Conditioning 2

Seismic Requirements

• Not Required- this project location is in a low seismic activity area.

Applicable Codes and Standards

• IMC - International Mechanical Code - 2021 Edition

• NFPA – National Fire Protection Association - 90A, 96, 99, 101 – 2021 Editions

• ASHRAE Standard 170- 2017 (Ventilation of Health Care Facilities) complete with amendments a-d.

• Facility Guidelines Institute (FGI) – 2018 Edition

• ASHRAE 90.1 – 2016 Energy Standard for Buildings Except Low Rise Residential Buildings.

• ASHRAE 62.1 - 2016 Ventilation for Acceptable Indoor Air Quality

Outdoor Climate Conditions

ASHRAE Climate Zone 2A (Moist)

• Dew Point Hours: 5152 DP >4,000 hours.

• Houston, TX (Harris County)

• Heating: 29.1°F (99.6% H DB)

• Cooling (minimum OA)- 0.4% DB/WB: 95.1°F DB / 77.6 MCWB, HR= 149.4 [Proposed Value per ASHRAE Fund. 2009].

Indoor Design Conditions and ventilation

Interior design temperature used for cooling shall be a minimum of 75°F (24°C) for cooling.

Energy Supply

• Electrical – 460V, 208V at 60 Hz available. Equipment to be selected at 460/3/60.

• Cooling - chilled water is provided by the hospital central plant.

HVAC Load Analysis

• Trane Trace 700

• VA Room HVAC Output Summary

Controls

• The controls will be brought up to the current ECC system platform as part of this work.

• New unit to be integrated to the existing Building Automation System.

End HVAC

DESIGN NARRATIVE- ELECTRICAL

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Ben Taub Green Elevator Modernization

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Electrical 1

DIVISION 26 ELECTRICAL

1. GENERAL

A. Project Information:

The project scope for this is to modernize the Green Elevators (a 6-bank) in Ben Taub Hospital, located in Houston Texas. These are elevators #7, #8, #9, #10, #11, and #12.

Electrical renovations shall include (but not limited to) new electrical feeds to elevator motors, electrical power to elevator controls and interior lighting and lighting within elevator pits as required per code. The elevator machine room HVAC (ACU-P1) and elevator machine room penthouse lighting will be replaced to accommodate the new elevator controller / machine layout.

B. Site Investigation:

1. A site investigation was performed on March 8, 2023 by The Spur Design Team.

Observations are captured in the remaining part of this narrative.

a. 13 transfer switches were replaced on the 3rd floor in the last 5 years.

b. Existing ATS’s have pre-signal controls to allow for communication with elevators.

c. No known building grounding issues were reported. Ground is tied to the building structure.

d. Lighting layout in elevator machine room does not provide adequate illuminate in front elevator controllers.

e. The current configuration of elevator controls allows all 6 elevator cars to move at the same time upon transfer of power to generator. Current generator capacity is indicated to be adequate for the current elevator sizing.

f. Elevator cab lights are fed from life safety panelboard LL6B located on level 6.

g. Existing elevator machines are 480V fed from panel 800A “EDPMA” (fed from

EATS-5) within machine room.

h. Facility did a generator replacement project in roughly 2019 and now has

(3) – 480Y/277V, 1500 KW generators which replaced (4) – 1000KW generators.

C. Scope of Work

The Electrical Scope of Work will include the following:

1. Assessment of existing electrical distribution. Panel EDPMA will need to be replaced to accommodate the replacement of the new elevator machines. The panel is obsolete and new circuit breakers and parts are no longer available.

2. Demolition of existing electrical feeders for associated motors and control devices for elevators #7, #8, #9, #10, #11, and #12.

3. Demolition of elevator pits lighting.

4. Demolition of elevator machine room light fixtures and light switches.

5. Demolition of elevator machine room HVAC (ACU-P1) and controls.

6. Coordination of elevator machine power with elevator selection.

7. Coordination and design of power for HVAC units required for elevator machine room.

8. Design of electrical and lighting layouts for elevator machine room and elevator pits.

9. Design of electrical for equipment and Mechanical loads.

10. Revision of essential electrical system as required for elevator replacement.

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11. Temporary power and illumination to install, test, and adjust elevator equipment.

2. ELECTRICAL CODES AND STANDARDS

A. International Building Code, with Houston Amendments (2015)

B. ASHRAE Standards 90.1-2013 – Energy Standard for Buildings

C. ASME A17.1, Safety Code for Elevators and Escalators, 2019

D. Illuminating Engineering Society (IES) Handbook, 10th Edition

E. NFPA 101 Life Safety Code (2021)

F. IBC 2021 – International Building Code

G. IEBC 2021 – International Existing Building Code

H. IECC 2021 – International Energy Conservation Code

I. NFPA 70-2020 - National Electrical Code (NEC)

J. NFPA 99-2021 – Health Care Facilities code

K. NFPA 101-2021 – Life Safety Code

L. NFPA 110-2022 – Standard for Stored Emergency and Standby Power Systems

M. NFPA 780-2020 – Standard for the Installation of Lightning protection Systems

N. HHS Design Guidelines, February 2022.

O. NFPA 111-2022 – Standard on Stored Electrical Energy Emergency and Standby Power Systems

3. ELECTRICAL DEMOLITION

A. Basic Assumptions:

1. Equipment being demolished shall be de-energized prior to the contractor performing any work so that work on live equipment will not be required.

B. Demolition of electrical work will include:

1. The Electrical demolition work within the building will be limited to the area of scope work. This will include the removal of the power circuits, lighting circuits, elevator pit receptacles, and all the existing affected equipment circuits withing the area of work.

2. Elevator motors #7, #8, #9, #10, #11 and #12 with their feeder conductors/conduits and disconnects back to the upstream panelboard “EDPMA”.

3. The elevator controllers with their power and control conductors/conduits back to the upstream panelboard “EDPMA”.

4. The elevator master group controller and disconnect with their power and control conductors/conduits back to the upstream panelboard “LL6B”.

5. Elevator machine room normal power linear strip light fixtures and lighting control devices with their feeder conductors/conduits back to the upstream panelboard

“NHMA”.

6. Elevator machine room emergency power linear strip light fixtures and lighting control devices with their feeder conductors/conduits back to the upstream panelboard

“EHMA”.

7. Elevator pit and hoist way receptacles, light fixtures and lighting control devices with their feeder conductors/conduits back to the upstream panelboard “NLBA”.

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8. Elevator pit lighting will be replaced which is fed from panel ELBA (120V).

9. Elevator cab light fixtures and floor indicators with their feeder conductors/conduits back to the upstream panelboard “LL6B”.

10. Elevator machine room HVAC (ACU-P1) disconnect, power and control conductors/conduits back to the upstream panelboard “EHMA”.

4. BUILDING POWER DISTRIBUTION SYSTEMS

A. Normal / Emergency Power System

1. The existing elevators machines #7, #8, #9, #10, #11 and #12 are fed from 800A 277/480V panelboard “EDPMA” located in the elevator machine room.

2. Panelboard “EDPMA” is fed from a 800A breaker on buss “MSA-A” via automatic transfer switch “EATS-5”.

3. The elevator machine room light fixtures and emergency light fixtures are fed from panelboards “NHMA” and “EHMA”.

4. Panelboard “NHMA” is fed from a 100A disconnect switch on panel “DP5A”.

5. The elevator master controllers power and car enclosure lighting are fed from panelboard “LL6B” located in Electric room 6SA-60-004.

6. Panelboard “LL6B” is fed from a 150A breaker on buss “LH1A”.

7. The elevator pit and hoist way receptacles, light fixtures and lighting control devices are fed from panelboard “ELBA”.

8. Panelboard “NLBA” is fed from a 200A disconnect switch on buss “DPBA”.

9. Panel “EDPMA” will need to be replaced to allow for new breakers to be installed to coordinate power requirements with the new elevator motors. This panel and parts are obsolete so there is no replacement parts available.

10. Power for Mechanical Equipment: Provide power for HVAC unit in elevator penthouse from existing panelboard “EHMA”.

11. Power for new elevator motors to be fed from existing panelboard “EDPMA”.

12. Power for new elevator cab controls and lighting to be fed from existing panelboard

“LL6B”.

13. Power for new equipment power lighting to be fed from existing panelboards “EHMA”.

14. Power for normal lighting to be fed from existing panelboard “NHMA”.

15. Power for in cab video equipment to be fed from existing panelboard “NLMA”.

16. Heavy-duty three-phase mainline copper power feeder to terminals of each elevator controller in the machine room with protected lockable “open” disconnecting means.

17. Single-phase copper power feeder to each elevator with individual protected lockable

“open” disconnecting means located in machine room for utilization equipment:

A. Car lighting.

5. GENERAL BUILDING LIGHTING EQUIPMENT AND SYSTEMS

A. Lighting Controls

1. Standard manual light switches will be quiet toggle type, specification grade and ivory in color as required by the design guide.

B. Lighting Fixtures:

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1. Machine Room or Control Space Lighting: Wire guarded 4’ long LED strip fixtures to provide minimum 19 footcandles average illumination. Provide manual toggle switch adjacent to strike side of machine room door. Occupancy sensor is not allowed.

1. Pit Lighting: wire guarded, vapor tight, 4’ LED fixtures (wall mounted) to provide minimum 10 footcandles average illumination.

2. GFCI convenience outlets in pit.

3. Non-GFCI convenience outlet in pit for sump pump.

4. GFCI convenience outlets in machine room or control space.

5. GFCI convenience outlets in machine space.

6. ELECTRICAL CALCULATIONS

A. Voltage drop calculations will be performed for all new feeders and branch circuits.

Feeders and branch circuits will be sized to limit voltage drop to the levels recommended by the energy code (2% for feeders, 3% for branch circuits, with the combined drop no more than 5%).

7. GENERAL ELECTRICAL EQUIPMENT

A. Panelboards

1. A new power panel will be required to replace ‘EDPMA’ due to obsolete parts.

Larger breakers are required to coordinate new elevator motor specifications than what is available in the panel. There is not available parts for this board, so it must be replaced. Fault current for this board will match that of the existing board it is replacing. All panelboards and circuit breakers will be fully rated Panelboards will include main circuit breakers where required by the NEC and bolt-on style circuit breakers. Bussing will be copper

2. Panelboards will be provided with clear, concise schedules.

3. All panelboards will be door in door type.

B. Disconnect Switches

1. New disconnect switches will be provided for HVAC and elevator equipment.

Switches will be heavy duty style, rated for the environment installed in and fused if required to protect equipment from high available fault currents. Disconnecting means will be provided within sight of all motors and other equipment.

2. Motor-rated disconnect switches will be provided for any fan-powered boxes.

C. Feeders, Branch Circuits, and Raceways

1. All conductors will be copper and routed within raceways.

2. A copper ground conductor will be routed with all circuits except building service entrance feeders.

3. Minimum raceway size will be 3/4” above grade and 1” below grade.

D. Wiring Devices

1. Receptacles will be, NEMA 5-20R grounding type, and ivory in color.

2. Corridors will have a cleaning receptacle at approximately 25-40-foot intervals.

3. Cover plates will be 302 brushed stainless steel. Cover plates for devices fed from emergency circuits will be 302 brushed stainless steel and engraved with “EMERGENCY” with red letters.

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4. Ground-fault circuit interrupter (GFCI) style duplex receptacles will be provided within 6’ of all sinks.

E. Grounding and Bonding

1. Equipment grounding conductors will be installed with all feeders, and power and lighting branch circuits.

2. All metallic raceways will be grounded, and the equipment grounding conductor will be bonded to all junction boxes, pull boxes, enclosures, and panelboards.

F. Labeling/Nameplates

1. Normal power distribution equipment will have white lettering on a black background.

Essential electrical distribution equipment will have white lettering on a red background. Lettering will be 1” tall and include the name of the equipment, name of the equipment it is fed from, and the sizes of the conductors that it is fed with.

2. All new and/or modified low voltage building electrical distribution equipment will be provided with new phenolic resin labels screwed to the equipment. Normal power distribution equipment will have white lettering on a black background. Essential electrical distribution equipment will have white lettering on a red background.

Lettering will be ½” tall and include the name of the equipment, name of the equipment it is fed from, and the sizes of the conductors that it is fed with.

3. All new wiring device cover plates will be labeled with a permanent adhesive label listing panel and circuit feeding the wiring device.

8. STANDBY/EMERGENCY POWER PROVISION:

A. Standby power of normal voltage characteristics via normal electrical feeders to run all elevators at the same time once transfer of power is complete. This is how the existing elevators currently function and the facility would like to keep this functionality with the elevator replacement.

B. Conductors from auxiliary form “C” dry contacts, located in the standby power transfer switch to a designated elevator control panel in each elevator group and/or single elevator unit to indicate utility or standby power active.

C. Conductors from auxiliary form “C” dry contacts, located in the standby power transfer switch to a designated elevator control panel in each elevator group and/or single elevator unit. Provide a time delay of 30-45 seconds for pre-transfer signal in either direction.

D. Standby single-phase power to group controller, and each elevator controller for car lighting, exhaust blower, emergency signaling device, intercom amplifier, hoist machine cooling fan, car heating and air conditioning unit.

E. Means for absorbing regenerated power during an overhauling load condition per NEC 620.91. Elevators will employ SCR IGBT drive, presenting a non-linear active load.

F. Standby power to machine room ventilation or air conditioning.

G. Standby power to emergency communications devices.

H. Within the last 5 years, an additional generator was added to the new paralleling gear, which has increased the capacity of generaion from 4000KW to 4500KW.

The previous capacity allowed for all 6 elevator cabs for simultaneous movement while utilizing generator power. The elevator motors are being replaced with equivalent motors so the generation capacity is still adequate.

Design Narrative - Electrical-100pct CD