ESBD_428085_1749852840156_03 Exhibit C - Building Systems Narratives and Commissioning specs.pdf

06TEXAS DEPARTMENT OF MOTOR VEHICLES | CAMP HUBBARD RENEWAL | 65% CONSTRUCTION DOCUMENTS | 2023.06.15

06 | BUILDING SYSTEMS NARRATIVES

Exhibit C

Risk Category IV Exposure Category C

Seismic Design Criteria:

Risk Category IV Seismic Importance Factor 1.50 Spectral Response Coefficient SDS 0.032 Spectral Response Coefficient SD1 0.016 Site Class B Seismic Design Category A

Ground Snow Load: 5psf

Fire Resistance:

Construction Type II-B Floors 0-hour Structural Frame and Bearing Walls 0-hour Roof 0-hour Roof at least 20’ above floor 0 hour, non-combustible Above some assembly occupancies 1-hour Stairs and elevators 1-hour

Deflection Control: L/360 total load deflection for horizontal framing L/600 live load for members supporting masonry walls

Materials:

Concrete Slabs on grade 4000 psi Elevated floors 5000 psi Columns 6000 psi Composite slabs 3000 psi Drilled Piers 3000 psi

STRUCTURAL

Design Criteria:

The following criteria are preliminary and subject to review and coordination with the project requirements as the design progresses.

Building Code:

2021 International Building Code

Live Loads:

Slab-on-Grade 150 psf Assembly areas, First Floor Corridors 100 psf Elevated Floors, Offices 80 psf min.

Corridors Above First Floor 80 psf Partition Allowance (where Live Load is less than 80 psf) 15 psf Designated Storage Areas 150 psf Mechanical Rooms 150 psf General Roofs 20 psf

Live loads will be permitted to be reduced as allowed in the Building Code.

Dead Loads (in addition to structural weights):

Ceiling and MEP Allowance 15 psf Roofing Materials (assumed) 10 psf

Wind Loads:

Design Wind Speed (3 second Gust) 120 mph

Up to 25% fly ash replacement for typical concrete Up to 45% fly ash replacement for concrete in drilled piers

Concrete Reinforcing ASTM A 615 Grade 60

Structural Steel Wide Flange Shapes ASTM A 992, Grade 50 Angles, Channels, Plate ASTM A 36 Hollow Structural Sections ASTM A 500, grade B Pipes ASTM A 53, grade B Bolts ASTM A 325

STRUCTURAL SYSTEM

The new office building for TxDMV will be primarily a 3-story building with some areas that are 1-2 story. Space planning results in a 32’ module grid, with 2 bays of 42’ spanning the short dimension of the building. The structure is not planned to be exposed, in general, in occupied spaces, except for possibly the entry areas.

Foundations:

A preliminary geotechnical survey has been conducted for the site and a draft report prepared by Raba Kistner Consultants, Inc. We understand that a final report will be provided once the existing building on the site is demolished and additional borings are completed. The draft geotechnical report recommends the use of either drilled straight shaft piers or shallow spread footings for this building. Upper soils are a mix of fat clays with limestone fragments. Competent limestone (Buda formation) is found between 4’ and 6’ below the ground surface in the areas around the building, in a strata approximately 15’ thick.

TXDMV | CAMP HUBBARD RENEWAL | 65% CONSTRUCTION DOCUMENTS | 2023.06.15

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Based on the preliminary geotechnical recommendations, we have proceeded with drilled straight-shaft piers bearing in the Buda limestone for the 65% Construction documents.

Level 1:

Preliminary grading information indicates that finished floor elevation (FFE) will vary between 636.00’ and 641.00’, with final grades at or near FFE.

In accordance with the geotechnical report recommendations, the Design Development documents specify a slab-on-grade over compacted select fill at the Ground Floor Level. Per the geotechnical report recommendations, the removal of 2ft of the existing Statum I soils (fat brown clay) would reduce potential soil related movements in the at-grade construction to ¾” or less. In order to further reduce this potential movement, the 65% Construction documents specify for all Stratum I soils to be removed and replaced with compacted select fill. This will create a variable depth fill pad between 4’ and 6’ under the building slab, depending on how the finished floor elevation relates to existing grades.

Elevated Floors:

During the Schematic Design Phase, three (3) viable structural system options were analyzed through the typical bay system study process to help identify the optimal system.

These consisted of (2) cast-in-place concrete systems and

(1) structural steel system. Details for these systems were presented in the SD structural narrative.

Based on feedback from the Architect and Construction Management consultant, the following scheme was selected as most cost-effective while meeting the project requirements:

Option O.BS.C2: A cast in place concrete “wide pan” joist system of 20 5/8” deep mild steel reinforced joists running the length of the building and flush bottom post-tensioned girders in the transverse direction.

Based on Construction Type II-B, the floor slabs have a 0-hour rating requirement, so spray fireproofing is not required.

Roofs:

The Construction Management consultant advised that it would be most economical to also frame the roof with concrete similar to the floor levels.

The roof will typically be low sloped (¼” per foot), by sloping the structure and using cricketed insulation locally around the drains.

Lateral Load Resisting System:

Lateral loads will be resisted by concrete moment frames to provide the required stability. Diaphragms of the concrete floor slabs will transmit lateral loads to the vertical bracing elements.

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- 2021 International Building Code

- 2021 International Mechanical Code

- 2021 International Energy Conservation Code

- NFPA 90A

- ASHRAE 62.1-2019 and ASHRAE 90.1-2016

- SECO Water Conservation Design Standards

B. Design Temperatures, as defined in the 2021 edition of ASHRAE Handbook Fundamentals, for the Austin- Bergstrom Airport will be used based on the 0.4% heating and cooling design conditions. Temperatures will be as follows:

- Sensible Cooling Outside Summer: 100.3°F DB/74.3°F

MCWB

- Latent Cooling Outside Summer: 76.5°F DP/81.0°F

MDB

- Outside Winter: 26.6°F DB

- Inside – Predominant design will be

• Occupied: 75°F Summer/70°F Winter

• Unoccupied: 80°F Summer/62°F Winter

- Ventilation and efficiency requirements to meet ASHRAE

62.1 and 90.1 standards.

C. Piping Design Criteria – Hydronic piping system shall be sized for a maximum pressure drop of 3ft/100 feet of piping or a maximum fluid velocity of 7.5 fps. Size coil pressure drops for a maximum of 15 ft.

D. Ductwork Design Criteria – All ductwork shall be designed in accordance with requirements of the construction specified in the latest SMACNA standards.

3. System Descriptions

A. Central Utility Plant

1) A new central utility plant (CUP) will be constructed as

MECHANICAL

DIVISION 23 - HVAC

1. Scope of Work

A. The following systems are included in the scope of work for this project.

1) Chilled Water Cooling and Hydronic Heating Systems

2) Custom Air Handling/Distribution Systems with Variable Air Volume (VAV) boxes

3) Energy Recovery Unit for Outside Air Pretreatment and General Exhaust Systems

4) DDC Controls

B. Comply with the TFC Owner’s Project Requirements dated June 22, 2021, with incorporated TxDMV review comments posted June 14, 2022. Any proposed deviations are identified in the Appendix Log.

C. The project shall establish a goal to use a minimum of 17 percent less energy on an annual basis compared to ASHRAE 90.1-2016. This requirement complies with the TFC Owners Project Requirements (OPR).

2. Design Criteria

A. The systems shall conform to the following codes, standards, and guidelines:

part of the new office building.

2) CUP will contain chillers, cooling towers, pumps, and accessories for the chilled water system.

3) CUP will contain a heat pump chiller, pumps, and accessories for the hydronic heating water system.

4) Double doors and overhead doors will be installed to allow for future equipment replacement.

B. Chilled Water System

1) The chilled water system shall consist of three, 400-ton centrifugal, water cooled chillers. The chilled water system will be sized for N+1 capacity. The chiller efficiency shall be greater than the ASHRAE 90.1-2016 minimum valves. The standard full load efficiency will be less than 0.565 KW/ton and the part load efficiency less than 0.370 KW/ton (better than Path B compliance).

Refrigerant for the chillers will be selected to comply with national and regional regulations for refrigerant use in future HVAC equipment. Chillers will be selected to restrict the use of high global warming potential (GWP) hydrofluorocarbons (HFCs). Chillers will be selected to use low GWP refrigerant.

a) Loading:

(i) CH-5 (Based on Load Calc) = 388 tons

(ii) CH-6 (Existing Building) = 370 tons

(iii) Total Cooling Load = 758 tons

2) Chilled water piping will be routed into both the new office building and the existing CH-6 building. New piping will be installed underground between the new office building and the CH-6 basement mechanical room.

3) Chilled water pumps will be arranged in a variable primary pumping configuration. There will be three, split case, inline pumps. One pump for each chiller sized for N+1 capacity. Each pump will have a 40 or 50 HP motor and a VFD.

4) The cooling tower will be a single, crossflow, 3600 gpm cooling tower with three cells. Furnish with a basin

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sweeper to help keep the basins clean of dirt and debris.

Provide drift eliminators to minimize water loss.

5) The condensing water system will consist of three, split case, inline pumps. Each pump will be dedicated to a specific chiller. Each pump will have a 25 or 30 HP motor and a VFD.

6) Water treatment will be included for each system as required to address scaling, dissolved solids, biologic growth, and corrosion protection.

7) Cooling tower controllers, overflow sensors, make-up meters, overflow alarms, and blowdown meters to manage make-up water will be connected to the building DDC controls.

8) The chilled water system is not designed for future expansion on the Camp Hubbard campus. The chilled water system is not designed to provide chilled water to existing CH-1 and existing CH-2 in the future. The existing chillers, cooling tower, pumps, and accessories located in CH-7 will provide chilled water to the campus during the new office building

C. Heating Water System

1) TFC has requested that the design team not specify a natural gas-fired boiler for this project. This request was noted in the TFC Owners Project Requirements (OPR) document. The design team has selected a modular heat pump chiller to provide heating water to the new office building.

2) The heating water system will consist of a modular, air cooled, heat pump chiller that will produce heating water for the new office building. CH-6 currently has two natural gas, condensing boilers that provide heating water for CH-6 only. Piping will be routed from the new office building to CH-6 so that during the colder months, the existing boilers can provide additional heat as required to maintain the building heating requirements.

3) The heat pump chiller will be installed on the Level 1 roof above the loading dock and consist of 9 modules.

Each module will consist of 2 scroll compressors.

4) The heating water system will be sized for N+1 capacity.

Eight modules will be capable of producing 2050 MBH output at 120 degrees F leaving water temperature when the design ambient temperature is 25 degrees F. The heating input will increase as the outdoor temperature rises above 25 degrees and the heating output will decrease as the temperature drops below 25 degrees.

Heating load for the new office building is based on load calculations.

5) For extreme cold outdoor temperatures, heating water from the natural gas boilers will be piped from CH-6 to CH-5. The existing natural gas boiler will only be used when the heat pump chiller cannot supply 120 degree water and does not have enough heat output to meet the CH-5 heating output.

6) Each module in the heat pump chiller can produce chilled water or heating water. For this project, the heat pump chiller will only be used for producing heating water. The water cooled, centrifugal chillers are more efficient than the air cooled, heat pump chillers.

7) The heating water will be pumped in a variable primary pumping configuration. Each pump will have a VFD.

There will be three primary heating water pumps sized for N+1 capacity.

8) Water treatment will be included for each system as required to address scaling, dissolved solids, biologic growth, and corrosion protection.

D. Air Handling Systems There will be two custom air handling units for each floor.

One unit will be located in the north mechanical room and the other unit in the south mechanical room. Each air handling unit will supply between 16,000 to 29,000 cfm.

Each AHU will have zone control capabilities through the use of single duct VAV boxes with hydronic reheat. AHU fans shall be fan-wall array modules with individual motors.

Each AHU will be constructed with L/200 deflection and a minimum of 1% leakage tested at 1.5 times the design total static pressure.

Cooling coils will be selected below 450 FPM face velocity.

Heating coils will be selected below 450 FPM face velocity.

Cooling coils with 5 rows and fewer shall have a maximum of 12 fins per inch. Cooling coils with 6 rows or greater shall have a maximum of 8 fins per inch. Maximum AHU coil depth will be 6 rows.

All AHU’s will have MERV 8 prefilters and MERV 13 secondary filters upstream of the cooling coil. All AHU’s will also have UV-C lighting downstream of the cooling coil to disinfect airborne pathogens in the air stream and to keep the coils clean from biological growth.

Single duct VAV boxes with heating water reheat coils will be installed throughout each floor. Reheat coils will be 2-row, 3-row, or 4-row based on heating load for each zone.

Temperature zones will be selected based on exposure and room type.

The IDF rooms will be served by dedicated VAV boxes.

Each VAV box will be sized based on the estimated heat load in each room. DX mini-split units are anticipated to be included in the new office building for backup cooling for the IDF rooms.

The main data center will be located in Building CH-6. For the CH-6 data center, provide six, DX in row cooling units for all IT/Data areas that will require 24/7 cooling. The final size and layout of the new data center is not yet determined.

The exact size and quantity of in row cooling units will be based on the final data center layout. The current design

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piping for isolation service and plug type valves for throttling service.

c) Duct Systems:

(i) All main ductwork shall be G-90 grade, galvanized sheet metal fabricated in accordance with SMACNA standards and shall have pressure classifications suitable for the static pressure of each system. Branch ducts to ceiling registers shall be insulated flexible ductwork.

(ii) Ductwork downstream of VAV boxes, all return and exhaust ducts shall be low velocity pressure class 1. All ductwork between the air handling unit and VAV boxes will be medium pressure.

(iii) Ductwork, Low Velocity - Hot dipped galvanized steel, low pressure type construction, air leakage not more than 5% of total, mastic seal all joints and seams.

(a) Grilles, Register and Diffusers: Prime coated steel and/or extruded steel.

(b) Fire and Smoke Dampers: Fusible link type fire dampers in fire separations fabricated in accordance with NFPA 90A and UL 555, and motor operated fire/smoke dampers at smoke barriers fabricated in accordance with UL 555S Class 2 Leakage Classification.

Smoke detectors in the supply ducts of all air-handling units and in ducts at smoke barriers.

d) Insulation:

(i) Flame spread of 25 or less; smoke developed of

50 or less.

(ii) High and Low Temperature Piping Insulation: For chilled water piping and heating water piping, furnish and install closed-cell phenolic foam or cellular glass insulation with all-purpose scrim foil jacket. Piping insulation shall be 1 inch thick for documents show six in row cooling units for 12 proposed data racks. An early bid package will be issued to allow construction on the data center to begin early. The existing CRAC units will be used to condition the data center until the in row units can be installed.

In Building CH-6, reuse the existing air handling units, single duct and dual duct VAV boxes, and controls on Level 2 and Level 3. On Level 1 and Level 4, modify the existing HVAC system in the areas that are being renovated. Reuse existing VAV boxes, ductwork, and diffusers where possible and provide new equipment where required. Level 5 was recently renovated (2017) and the AHU’s, VAV boxes, and ductwork can be reused. The existing AHU’s have been replaced at different dates between 2002 and 2010 and are in satisfactory condition based on their age. Reuse the existing gas-fired, condensing boilers, pumps, and piping in the basement. Extend new heating water and chilled water piping from the new office building to tie-in points in the basement. The rooftop elevator equipment room and any dedicated exit egress corridors will be served by a dedicated DX fan coil unit.

1) Basic Materials and Methods

a) Piping:

(i) (i) CHW and HW piping shall be ASTM A53 black steel schedule 40 with steel fittings for larger pipes. Pipe shall be welded and flanged for piping over 2 inches. For piping 2 inches and smaller, brazed Type L copper pipe with brass/ bronze socket type fittings. Pro-press fittings are also acceptable. Water piping below grade shall be preinsulated buried steel and provided with a sacrificial cathode corrosion protection system.

b) Valves:

(i) Valves shall be brass with stainless steel ball for 2 inches and smaller and lug type butterfly for larger piping 1 inch and smaller and 2” thick for piping larger than 1 inch. Piping exposed in mechanical rooms and inside building shall have aluminum jacket. Piping exposed in exterior to building shall have aluminum jacket. For condensate drain piping, furnish and install closed cell elastomeric insulation. For chilled water accessories, insulate with closed cell elastomeric insulation.

(iii) Round or Rectangular ductwork with longest side 18” or less: 1.0 lb. per cu. ft. density, 1-1/2” thick flexible glass fiber with reinforced foil kraft facing, all joints sealed. All external. Duct board can also be used. Provide double-wall, insulated duct in all areas with limited access such as vertical chases and in all areas where duct is exposed.

(iv) Rectangular ductwork with longer side greater than 18”: 1.5 lb. per cu. ft. density, 1-1/2” thick flexible glass fiber with reinforced foil kraft facing, all joints sealed. All external. Duct board can also be used. Provide double-wall, insulated duct in all areas with limited access such as vertical chases and in all areas where duct is exposed.

E. Ventilation and Exhaust Systems

1) Outside air will be introduced to the building directly through a custom energy recovery unit. Ventilation rates will meet or exceed the minimum requirements listed in

ASHRAE 62.1.

2) Energy Recovery Unit (ERU) system will be installed on the roof according to the 2021 IMC and comply with 2021 IECC code. ERU will consist of a total energy recovery wheel, supply fan wall, chilled water coil, heating water coil, exhaust fan wall. Pretreated outside air will be ducted to the return ductwork in each mechanical room.

Exhaust air from restrooms, janitor’s closets, electrical rooms, and beak rooms will be exhausted up to the exhaust section of the energy recovery unit. Additional

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relief air will be exhausted form the building plenum to keep the building slightly positive at all times.

3) The ERU will be sized for approximately 13,600 cfm of outside air and 10,800 cfm of exhaust/relief air.

4) Where exhaust air cannot be routed to the ERU, furnish additional exhaust fans as required in the warehouse and other areas of the building as required.

5) The top level of the building is below 75 feet and is not considered to be a high rise building. Stairwell pressurization and other high rise life safety systems are not required to be installed in this building.

F. Testing, Adjusting and Balancing

1) In accordance with NEBB and AABC standards for ductwork and piping systems.

G. Controls

1) The building will have a standard DDC controls system that will control the sequencing between the chillers, pumps, air handling units and VAV boxes. The DDC system will allow the owner to monitor the temperature in each zone. They will also receive text and e-mail alerts when there is a problem with any piece of equipment.

2) The existing Camp Hubbard campus has Johnson Controls in each building. However, this system will not be expanded. Reuse the existing Johnson Controls system in building CH-6 as part of the renovation work.

3) A new Tridium Niagara 4 framework will be installed to allow other manufacturers to provide controls to new pieces of equipment.

4) A central plant optimization system will be considered for improved CUP operating efficiencies.

5) The BAS shall be a BACNet/IP based control system with a common user interface throughout the new buildings subject to TFC requirements.

6) Graphics screens will be provided based on current TFC standards.

7) The design engineer shall work with DMV and TFC to develop the sequence of operation for all new equipment.

Control strategies will focus on conserving energy while maintaining a comfortable work environment.

Temperature and pressure resets will be incorporated.

Safeties will be in place where required by code and when required to protect existing equipment.

8) Comply with additional controls requirements noted in section 5.12 of the Texas Facilities Commission Owner’s Project Requirements dated June 22, 2021.

H. Equipment Manufacturers

1) Chillers – Trane, JCI/York, Daikin, Carrier

2) Cooling Towers – Evapco, BAC, Marley

3) Heat Pump Chillers – Trane, Multistack, ClimaCool

4) Pumps – Taco, Bell & Gossett, Armstrong

5) Modular Air Handling Units – Temtrol, Climate Craft, Haakon, Trane Custom Series, York Custom Series

6) VAV Boxes – Titus, Price, Nailor, Metalaire

7) General Exhaust Fans – Cook, Greenheck, Twin Cities, CaptiveAire

8) Diffusers and Registers – Titus, Price, Nailor, Metalaire

9) Computer Room Units – Liebert (Vertiv), Stultz, Data Aire, APC (Schneider)

10) Controls – JCI, Siemens, Schneider, Trane

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3. System Descriptions and Specifications

A. Electrical Distribution:

1. Service 1 (Central Utility Plant [CUP]):

i. The estimated electrical load (per NEC requirements) for the CUP is 2000 KVA (2350A @ 480V3P). With 25% spare capacity per OPR.

ii. A new, Austin Energy pad mounted utility transformer with a 10’ x 10’ reinforced concrete pad located outside of the building served from the Mopac side.

Re: sheets O.E004 and O.E211.

iii. Primary service to new transformer will be derived from an existing overhead line. A new underground line will be installed from a new in-line riser pole to deliver underground primary voltage to the transformer.

2. Main Switchgear 1 (CUP): A new, approximately 2500A, 480Y/277V service lateral will feed a 2500A exterior switchgear disconnect switch (switchgear construction).

The exterior disconnect switch will serve a 2500A indoor switchgear with sliver plated copper bus in the main electrical room. Re: O.E004 for switchgear sizing information.

3. Service 2 (New Office Building):

i. The estimated electrical load (per NEC requirements) for the entire building is 2560 KVA (3200A @ 480V3P).

With 25% spare capacity per OPR.

ii. A new, Austin Energy pad mounted utility transformer with a 10’ x 10’ reinforced concrete pad will be located outside of the building to be fed from the Mopac side.

Re: sheets O.E005 and O.E211.

iii. Primary service to the new transformer will be derived from an existing overhead line. A new underground line will be installed from a new riser pole to deliver underground primary voltage to the transformer

4. Main Switchgear 2 (New Office Building): A new, approximately 4000A, 480Y/277V service lateral will feed a 4000A exterior switchgear disconnect switch

ELECTRICAL

1. Scope of Work

A. Furnish materials and labor to install a complete and operating electrical system as follows and described herein.

1. Electrical Distribution

2. Grounding

3. Lighting Protection

4. Lighting

5. Receptacles and power connections

6. Site Power

7. Rough-in for communications, camera, security systems, and fire alarm

8. Building CH-6

B. Comply with the TFC Owner’s Project Requirements (OPR) dated June 22, 2021, with incorporated TxDMV comments posted June 14, 2022. Any deviations are identified in the appendix log.

2. Design Criteria

A. The systems shall conform to the following codes, standards, and guidelines:

1. 2020 NFPA 70 – The National Electrical Code

2. 2021 International Energy Conservation Code

3. 2021 International Building Code

4. NFPA 101, Latest Edition

(switchgear construction). The exterior disconnect switch will serve a 4000A indoor switchgear with silver plated copper bus in the main electrical room. Re: O.E005 for switchboard sizing information. A surge suppressor to be installed upstream of the main disconnect.

5. Emergency Stand-by Generator (New Office Building):

Per OPR, for life safety, a 480Y/277V 200 kW natural gas generator with exterior sound attenuating enclosure will be required. A generator docking station is to be provided with the ability to quickly connect a temporary portable generator and also provide the ability to load back test the generator. One transfer switch is to be provided for emergency stand-by generator.

6. Optional Stand-by Generator (New Office Building):

Per OPR, for MDF/IDF room power, elevator power, and other misc loads, a 480Y/277V 225 kW natural gas generator with exterior sound attenuating enclosure will be required. A generator docking station is to be provided with the ability to quickly connect a temporary portable generator and also provide the ability to load back test the generator. Per OPR, a dedicated ATS is required for optional stand-by generator.

7. Automatic Transfer Switch: Each automatic transfer switch is to be mechanically-held, electronically transferred, and equipped with isolation bypass.

8. Generator (CUP): No generator will be provided in the CUP. This is a deviation from the OPR. The existing CUP does not have generator back up.

9. Distribution Gear:

i. Equipment & lighting panelboards serving the first, second, and third floor; 480Y/277V Square D I-Line or equivalent with copper bus on each floor: Lighting panelboards will be 42 circuits. This is a deviation from the OPR.

a. Refer to electrical one-line and power floor plans for panel/xfmr quantities and locations.

ii. Branch circuit panelboards; 208Y/120V Square D

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NQ, NF or equivalent with copper bus.

a. Refer to electrical one-line and power floor plans for panel/xfmr quantities and locations. Receptacle panelboards will be two section 168 circuit panelboards with feed thru lugs. This is a deviation from the OPR.

iii. Energy Metering: Energy metering will be included per 2021 IECC C405.12 requirements for measuring/ reporting energy consumption for total building, HVAC, interior lighting, exterior lighting, plug loads, and miscellaneous loads. Metering will be done at the main gear and generator distribution panels, collected together by networked software, and logged to meet IECC requirements

10. Coordination study: Coordination study will be done by the gear manufacturer based on a performance specification to determine circuit breaker settings and labeling requirements per NFPA 70E.

11. Raceways:

i. ¾” is the smallest size raceway to be used.

ii. Feeders shall be electrical metal tubing (EMT) where concealed inside the building, rigid PVC where installed underground and rigid galvanized steel (RGS) where exposed.

iii. Branch circuits shall be EMT where concealed, RGS raceway where exposed, PVC where underground.

a. MC Cable permitted for use as whips no longer than 72”.

iv. Connections to motors shall be made with flexible raceways, liquid tight where exposed to damp conditions. Length not to exceed 48”.

v. EMT raceways with compression fittings.

vi. Underground schedule 40 PVC in flowable fill or schedule 80 PVC.

12. Conductors:

i. 600V copper with THHN/THWN insulation. For branch circuits.

ii. 600V aluminum with THNN/THWN insulation for normal power feeders larger than #1.

iii. Feeders for emergency loads shall be fire rated mc, run under ground, or run in sprinkled spaces. 480V feeders in CH-6 emergency will be fire rated mc cable (this is a deviation from TFC limitations on mc cable taken to meet NEC requirements)..

B. Grounding:

1. Each feeder and branch circuit will be installed with an insulated ground wire sized per the NEC. The building grounding system will consist of a 4/0 bare stranded copper ground loop with 7/8” x 10’ copper clad steel ground rods spaced every 50’/every other column footing (whichever is closer) encircling the building, a concrete encased grounding electrode, connection to reinforcing steel, and connection to the main water line. Grounding system will include separate grounding risers for electrical rooms and one for IDF rooms with ground bars located in each electrical room and each IDF room. Each grounding riser will have two stranded copper whips connected between the ground bar and the grounding loop exothermically welded at each end.

2. See Grounding detail on sheet O.E601 and site plan S.E000.

C. Lightning Protection:

1. A complete lightning protection system will be installed on the roof of the building and will bonded to the building grounding system loop. See site plan S.E000.

2. Lightning protection system will be furnished by a single manufacturer responsible for design of a cage system and selection of components.

3. A contractor specializing in the installation of lightning protection systems will perform the installation.\

D. Lighting:

1. Interior Lighting:

i. Lighting systems will be designed and specified to meet the illumination levels as recommended by the IES for each specific task area.

ii. Emergency lighting will be powered though the emergency stand-by generator on the new office building.

iii. Emergency lighting will be provided with battery packs on the CUP. This is a deviation from the OPR due to the small size of egress load on the CUP.

iv. LED fixtures with low voltage lighting controls.

v. Device plate colors shall be selected by Architect.

vi. Fixtures will be controlled by wall switch occupancy sensors, dimmers, and daylight harvesting.

vii. Contact Legacy Lighting to discuss proposed light fixture and controls package.

2. Exterior Lighting:

i. Area lighting in the parking lots will be provided to achieve 1 footcandle average illumination levels.

Fixtures will be on 30’ poles with LED lamps to match existing on site. Fixtures will be controlled by lighting contactor and photocell.

ii. Landscape lighting and powered monument sign to be installed as noted by architect.

E. Receptacles and power connections:

1. Commercial grade, non-IG 20A receptacles. Hubbell

5362 or equivalent.

2. GFI receptacles in restrooms, above all countertops with sink and exterior locations. Hubbell GFR8300HxLA or equivalent.

3. Device plate colors shall be selected by architect.

4. Provide power connections for all owner furnished equipment.

5. Provide power connections for all HVAC equipment.

i. Safety disconnect switches, heavy duty, fused type, shall be provided for HVAC equipment where required

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iii. Remove UPS2 and associated feeders. UPS2 is partially disassembled and not running. UPS1 to remain active until refurbished UPS is powering data center. Intercept 500 A feeder to UPS2 from Existing Main Switchboard-East. Note that this breaker is a service disconnect and will not be replaced. Breaker may be turned off until UPS-A bypass is ready to be energized. Install junction box in ceiling space of MECH 2.1.044. Cap conductors until ready to extend to UPS-A. Install 200A 3-pole enclosed circuit breaker in UPS electrical room to connect to bypass side of UPS-A. Re: R.E004, R.E005, & R.E210.

iv. Replace 500A circuit breaker in existing generator switchboard serving UPS2 with new 200A 3-pole circuit breaker. Coordinate this replacement/outage with owner as Data Center will be temporarily without generator power. Install conduit and wire where possible to limit switchboard downtime. Extend feeder from new breaker to UPS-A rectifier input. Re:

R.E004, R.E005, & R.E210.

v. Extend feeders to busway system for A Side feed of data center racks. Serve busway from 225A output breakers in relocated PDU-A. Re: R.E004, R.E005, & R.E210.

vi. Once data center is running from UPS-A/PDU-A, demo UPS1, MOTS transfer switch, UPS switchboard, existing PDC-C, and temporary circuits connected to the B side power feed of the data center. Remove all feeders associated with this equipment. Intercept 500A feeder to UPS1 from Existing Main Switchboard- East. Note that this breaker is a service disconnect and will not be replaced. Breaker may be turned off until UPS-B bypass is ready to be energized. Install junction box in ceiling space of MECH 2.1.044.

Cap conductors until ready to extend to UPS-B.

Install 200A 3 pole enclosed circuit breaker in UPS electrical room to connect to bypass side of UPS-B.

Re: R.E006, R.E007, & R.E210.

6. Receptacles will be switched with the lighting control system in compliance with the 2021 IECC C405.11.

F. Site Power:

1. Power for electric vehicle charging stations as well as an RV hook up will be provided onsite. Re architectural site plan for location and quantities. Chargers equivalent to EV Charge Solutions Automobile Chargers, Type E20SWP with 25’ charging cables. Serve EV stations and RV connection from panel LSP.

G. Rough-in for communications, camera, security systems, and fire alarm:

1. Communications, camera, security systems, and fire alarm are specified by others. Electrical contractor to provide required rough-ins and empty conduits to accessible areas. Based on technology and life safety drawings.

H. Building CH-6:

1. Refurbish Eaton UPS and Powersmith PDU left on existing dataroom floor. These units are to be relocated to the new UPS electrical room for the A side power to data room racks. Similar UPS and PDU to be provided and installed in UPS electrical room for the B side power to data room racks. See sequence below and sheets R.E004, R.E005, R.E006, R.E007, AND R.E210. Data Center to remain powered at all times. Contractor to provide architect, engineer, and owner written sequencing plan to convert data center from temporary power to permanent power. See below for potential sequencing.

i. Under separate project, Data Center will be temporarily powered from existing CH-6 building power.

ii. Refurbish existing Eaton UPS. Replace existing batteries and provide factory start-up and commissioning. Re: R.E210.

vii. Replace 500A circuit breaker in existing generator switchboard serving UPS1 with new 200A 3-pole circuit breaker. Coordinate this replacement/outage with owner as Data Center will be temporarily without generator power. Install conduit and wire where possible to limit switchboard downtime. Extend feeder from new breaker to UPS-B rectifier input. Re:

R.E006, R.E007, & R.E210.

viii. Extend feeders to busway system for B Side feed of data center racks. Serve busway from 225A output breakers in relocated PDU-B. Re: R.E006, R.E007, & R.E210.

2. Replace existing CRAC panel with new DHVAC panel with shunt trip main to serve data center HVAC and lighting. During this portion, provide temporary cooling for data center for at least 30 days including generators to run cooling. Temporary cooling to remain in place until new in row cooling equipment is operational.

3. Existing generator is a 450-kW generator installed in 2017 that appears to be in good condition.

4. Intercept generator feed to add legally required emergency power to serve Fire Alarm and Egress Lighting. During outage, provide temporary back up generator for data center connected to ATS 1. Coordinate connecting ATS 1 to temporary generator with owner as data center will be temporarily without generator back

up. Temporary generator to remain connected until permanent connection to existing generator is ready to be restored. New circuit breaker disconnects will be added near the generator for Emergency and Optional Standby ATS services. A new NEMA 3R EM ATS will be added near generator to serve Emergency branch. Re:

R.E008, R.E009, R.E210, & R.E240.

5. Install new 4000 A switchgear to combine the two building services into one utility service. Re: R.E008 & R.E009.

6. Relocate existing generator docking station to new location near loading dock. Re: R.ED210 & R.E210.

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7. Install new 480V emergency panels on level 1 and 4.

Install new transformer on level 1 to serve 208V EM Panels on Level 1 and 4 to serve fire alarm. Re: R.E009, R.E210, & R.E240.

8. Intercept existing lighting throughout building with EM power to serve as new egress lighting. Connect a portion of new lighting to EM power to serve as egress lighting.

9. Level 4 is to be renovated and receive new lighting and receptacles. Existing panelboard will be replaced and relocated to new centralized electrical room. Re:

R.E008, R.E009, & R.E240.

10. See architectural package for renovation information pertaining to levels 1-3.

11. Provide exterior power to new EV charging stations.

Re architectural site plan for location and quantities.

Chargers equivalent to EV Charge Solutions Automobile Chargers, Type E20SWP with 25’ charging cables.

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2. Design Criteria

A. The systems shall conform to the following codes, standards, and guidelines:

1) 2021 International Building Code (IBC)

2) 2021 International Fire Code (IFC)

3) 2021 International Plumbing Code (IPC)

4) 2021 International Energy Conservation Code (IECC)

5) NFPA 101, latest edition.

6) SECO Water Conservation Design Standards

3. System Descriptions

A. Domestic Water Distribution:

1. A minimum 4” water service main as required by the IPC, with a water meter for the building and additional water meters for the cooling tower, chilled water system, and heating water system. Minimum pipe size throughout the building shall be ¾”. The main service size is based on an approximated load of 1267 water supply fixture units. This includes the required water demand for the cooling tower.

2. Low pressure loss reduced pressure backflow preventer inside the building. Provide a second backflow preventer in the CUP for HVAC system make-up water.

3. A single tank water softener system with a brine tank will be installed in the domestic cold water piping system.

The HVAC equipment make-up water is not part of the water softener system.

4. Velocities: Limit piping velocities to 8 fps to avoid any excessive corrosion of copper lines and elbows.

5. Pressures: Flow tests have been performed. A domestic booster system is not required. A pressure reducing valve will be specified. Tees will be added to allow for a future booster pump to be installed if required by changing water pressure or building renovations.

PLUMBING

1. Scope of Work

A. The following systems are included in the scope of work for this project.

1) Domestic Water Distribution with Water Softener

2) Domestic Hot Water Heating and Distribution

3) Sanitary Waste and Vent Systems

4) Roof and Overflow Drainage Systems

5) Compressed Air System

6) Plumbing Fixtures

B. Comply with the TFC Owner’s Project Requirements dated June 22, 2021, with incorporated TxDMV review comments posted June 14, 2022. Any proposed deviations are identified in the Appendix Log.

C. The plumbing system shall reduce aggregate indoor water use by 30 percent over baseline per EPAct 1992. Fixtures and equipment shall meet EPAct 1992, EPA WaterSense Labeled, ENERGY STAR-labeled or FEMP-designed Energy Efficient Product.

A. A condensate collection system shall be considered for the project by the design team.

6. Distribution Routing:

a. Building: DCW main from the site enters at the building CUP. The service entrance shall have a main shut-off valve and two parallel branch lines each with isolation valves, a basket strainer, and a reduced-pressure backflow preventer. Combine line to a single header to serve building hot and cold water, HVAC make-up water, and sampling.

b. First Floor: DCW main will be run in the first floor ceiling corridor at the center / core of the spaces, with valved branch lines tapping off at each group of fixtures.

c. Second and Third Floors: A riser will be routed up to the 2nd and 3rd floors and the piping will be routed similar to the 1st floor. Provide shutoff valves at each floor and at each main hot water and cold water pipe.

d. Roof: A pedestal hose bibb will be installed on the roof for servicing of mechanical equipment. Install heat trace where required to keep piping above 40 degrees

7. Materials:

a. Pipe: ASTM B88 Type L copper with wrought copper fittings and 95-5TA solder. Above ground piping 4” and larger shall be Type L copper or 316 stainless steel schedule 10. Below grade piping 3” and larger will be Class 150 PVC with integral bell and spigot joints for distribution piping. Pro-press fittings may be used on interior domestic water piping.

b. Valves: Valves will be lead free brass ball valves with stainless steel ball for 2” and smaller. For piping 3” and larger, valves shall be flagged, iron body, bronze mounted gate valves.

c. Insulation: Piping (cold water below a roof or in an exterior wall) will be insulated with ½” thick fiberglass insulation and aluminum jacket. Piping exposed to weather will be insulated with 1” thick fiberglass insulation and aluminum jacket. Exposed piping

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in mechanical rooms shall also have aluminum jacketing.

d. Heat Trace: Piping exposed to freezing temperatures will be provided with self-regulating heat trace to maintain piping above 40F.

e. Water Hammer Arrestors: Bellows type water hammer arrestors will be provided for all individual branch lines serving self-closing or quick closing valves.

Water hammer arrestors will be located above ceiling to avoid the use of wall mounted access doors.

f. Trap Primers: Furnish an electronic priming assembly capable of multiple drains. Furnish flush valve primer for single trap.

B. Domestic Hot Water Heating and Distribution: Domestic hot water heating will be provided to serve hot water, stored at 140 degrees, mixed to 120 degrees, and circulated to the various fixtures at each floor. Hot water for the lavatories shall be further mixed at the point of use to 105 degrees as required by code. Other system criteria are as follows:

1. Velocities: Limit piping velocities to 6 fps or 3 psi pressure drop per 100 feet of piping to avoid any excessive corrosion of copper lines and elbows.

2. Criteria: The system will be designed as a hot water recirculation system with maximum of 5F temperature loss from the heaters to the most remote points of the loop. Runouts from the loop will be held to a maximum length of 10 ft.

3. Distribution Routing: Refer to domestic water section above.

4. Heaters and Recirc Pumps: A floor mounted, electric water heater with tank rated for 150 psig working pressure on each floor. A hot water recirc pump serving the 120F recirc system will be approximately 5 gpm at 13 ft of head will be provided for each water heater. For remote fixtures, a small, 6-gallon water heater will be installed above the ceiling.

5. Expansion Tanks. Bladder type expansion tanks will be provided for each hot water system.

6. Materials:

a. Pipe: Piping will be ASTM B88 Type L copper with wrought copper fittings and 95-5TA solder.

b. Valves: Valves will be lead free brass ball valves with stainless steel ball for 3” and smaller.

c. Insulation: All hot water piping will be insulated with

1” thick fiberglass insulation and aluminum jacketing where required.

d. Recirc balancing valves: Recirc balancing valves shall be Bell and Gossett or Taco circuit setters.

C. Sanitary Waste and Vent Systems: Sanitary waste and vent will be provided. Specific sanitary design features are as follows:

1. The site will be served by a 6” sanitary service main for the north side of the building and a 4” sanitary service main for the south side of the building. 4” branch mains shall be run throughout the office building.

2. Waste and vent stacks will be routed through the building floors adjacent to columns where possible.

3. Vent stacks will be collected to limit the number of roof penetrations.

4. Sanitary vents will be located to maintain a minimum of 10 ft. from all air intakes.

5. Cleanouts will be provided at the base of all stacks, and at locations as required by code.

6. Sanitary lines serving condensate for air handling units shall be insulated.

7. Floor drains or floor sinks shall be provided at public and private restrooms, shower rooms, custodial closets, mechanical rooms, ice makers, and other locations requiring a floor drain or floor sink.

8. Materials:

a. Sanitary Waste and Vent Pipe: Piping and fittings below slab will be schedule 40 PVC DWV. Piping above slab and within the building will be hubless cast iron with stainless steel clamp shields and neoprene gaskets.

b. Floor Drains/Floor Sinks: Cast iron with flashing flange neoprene hubless outlets nickel bronze strainer trap primer valves.

c. Sump Pump for elevators will be installed in the elevator pit.

d. Hub Drains for HVAC equipment condensation, ice machines, and any other fixture that requires a drain.

D. Roof Drainage and Overflow Drainage: Roof drainage will be provided for the building. Both primary and secondary drainage systems will be used. These systems will be completely separate all the way to the point of discharge as required by code. Both the primary and the secondary systems will be designed for 5” per hr rainfall intensity.

Specific features of the roof and overflow roof drainage design are as follows:

1. Roof drainage areas will be limited to approximately

3000 s.f. per drain where possible. This will keep the roof drain branch piping predominantly at 6” in size or smaller. Roof drains will be gathered together in small groups and routed down adjacent to columns where possible. This keeps the horizontal runs short and minimizes piping and duct conflicts in the top floor ceiling. Horizontal piping will have a 1/8” per foot slope.

2. The roof & overflow drains will be consolidated above the 1st floor ceilings. Roof drains will exit the building on the west side. Overflow drains will terminate 12” above grade with down spout nozzles or scuppers will be used where practical.

3. Materials:

a. Piping will be glued joint schedule 40 PVC DWV for below grade use. Piping above slab and within the building will be hubless cast iron with stainless steel clamp shields and neoprene gaskets.

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the north side of the building. Refer to the architectural drawings for the quantity of new and existing plumbing fixtures.

I. Other Plumbing Systems: As part of the base bid, grease trap, chemical waste systems, and indoor gas-fired appliances are not intended to be used in this project.

Garbage disposals shall not be used unless otherwise noted. Natural gas piping is not intended to be used inside of the building. Provide natural gas piping as required for building backup power generators.

J. Plumbing Fixtures: The following plumbing fixtures will be provided for this facility. All plumbing fixtures will be selected based upon exceeding the Federal, State and Local water conservation requirements.

1. Water Closets: Wall-Hung, flush valve, electric hard wired electronic sensor type at public washrooms, 1.28

GPF.

2. Lavatories: Vitreous china, under counter mount and wall mount, deck mount faucets with 0.5 GPM flow restricting aerator and hard wired powered electronic sensor.

3. Mop Service Basins: Terrazzo mop service basins with service sink faucet, mop hanger etc.

4. Sinks: Stainless steel, countertop, ADA compliant sinks with faucets with gooseneck spouts and lever handles.

Furnish with 1.25 gpm aerators. As requested by the owner, garbage disposals will be added to all sinks located in the Breakroom/Catering Kitchen on Level 1.

All other sinks will not have garbage disposals.

5. Showers: Showers shall be provided with a shower surface and solid surface panel walls. Concrete slab required to be recessed at pan locations. Trim with thermostatic and pressure balancing mixing valve, slide bar and handheld shower. 2.0 gpm shower head and

1.125 gpm hand-held shower set.

b. Roof drains to be galvanized cast iron with flashing flange, clamp, extension flange, cast iron dome, large sump receiver. Overflow drains to be same type except with 2” high dam or standpipe. Coordinate with architect where scuppers will be used in lieu of overflow drains.

c. Insulation: Roof drain bodies, horizontal piping and piping off of the drain where it turns to the horizontal will be insulated with 1” fiberglass duct wrap or 1” fiberglass pipe insulation all-purpose foil scrim jacket.

E. Compressed Air System: A 5 HP compressed air system will be provided in the Fleet Vehicle Bay, Loading Dock, and Warehouse spaces. A vertical, simplex air compressor will be specified with an 80 gallon storage tank. Furnish with air dryer and filter to keep moisture out of the compressed air piping.

F. Fin Water Condensate Collection: A fin water condensate collection system, which recovers condensate generated at HVAC cooling coils, shall be…