PLANS.pdf
PDF 1 MB Posted
- Attached to
- Replace 2 Boilers at Rock Rapids Garage
- Solicitation number
- 645-RFB-2524-2026
- Issued by
- Linn County, Iowa
About this file
This is a mechanical and electrical construction plans document for the Iowa Department of Transportation's boiler replacement project at the Rock Rapids Maintenance Garage located at 1204 N 2nd Ave E, Rock Rapids, IA 51246. The project involves the replacement of two existing 180 MBH natural gas boilers (US Boiler UALTA 180 models) that support the facility's in-floor radiant heating system. The scope of work includes demolition of existing boilers, pumps, combustion air intake venting, and associated controls; installation of new boilers with integrated primary heating pumps; replacement of all shutoff valves throughout the system; installation of new air and dirt separators, expansion tanks, glycol feeders, and temperature sensors; flushing of all existing heating water piping to remove accumulated sediment; removal and replacement of inadequate pipe insulation; electrical disconnection and reconnection work including new breakers and wiring; and roof penetrations for new venting and combustion air intake lines. The project includes connections to four existing zone manifolds (Garage, Mechanics Bay, Wash Bay, and a new Brine Building), with secondary heating loops sized for 15°F delta T at 95°F supply temperature. The plans were prepared by Shive-Hattery engineering firm in West Des Moines, IA, with certifications from licensed mechanical engineer Brian A. Steffens (License 22014) and electrical engineer Edin Smailovic (License 21953), both dated January 9, 2026.
The construction documents include detailed mechanical floor plans, schematics, and symbol legends specifying equipment schedules for two identical boilers, four secondary zone pumps (Grundfos UPS series), two primary boiler pumps, one expansion tank (Bell and Gossett B-200, 53-gallon bladder type with 36 PSI relief setting), one air and dirt separator (VDN200FA), and one glycol feeder (Axiom DMF300 with 17-gallon tank filled with 30% propylene glycol). All piping is to be insulated per specifications, with new 3-inch venting and combustion air intakes requiring 12-foot minimum offset from precast wall faces on the roof and sloped back toward boilers per manufacturer requirements. The contractor is responsible for field verification of existing conditions prior to bid submission, patching and repairing all unused openings and modified surfaces, and proper disposal of construction debris unless claimed by the owner who retains first salvage rights.
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Other files
| File | Type | Posted |
|---|---|---|
| A101_2017 sample.pdf | ||
| SPECIFICATIONS.pdf | ||
| 1372264-event.pdf | ||
| Pre-Bid Request for Approval of Products or Materials.pdf |
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Text version
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SHEET INDEX CERTIFICATIONS
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IDOT - ROCK RAPIDS BOILER REPLACEMENT
IOWA DEPARTMENT OF TRANSPORTATION
1204 N 2ND AVE E, ROCK RAPIDS, IA 51246
C O
N S
T R
U C
T
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-0
-2
G000 COVER SHEET
M101 MECHANICAL FLOOR PLAN AND SCHEMATICS
M600 MECHANICAL SYMBOLS, DETAILS, AND SCHEDULES
PROJECT MAP PROJECT LOCATION
PAGES, SHEETS OR DIVISIONS COVERED BY THIS SEAL
MY LICENSE RENEWAL DATE IS DECEMBER 31,
I HEREBY CERTIFY THAT THIS ENGINEERING DOCUMENT WAS
PREPARED BY ME OR UNDER MY DIRECT SUPERVISION AND THAT I
AM A DULY LICENSED PROFESSIONAL ENGINEER UNDER THE LAWS
OF THE STATE OF IOWA.
PRINTED OR TYPED NAME
SIGNATURE DATE
LICENSE NUMBER
Brian A. Steffens
Mechanical items on ME sheets
22014
MECHANICAL ENGINEER
PAGES, SHEETS OR DIVISIONS COVERED BY THIS SEAL
MY LICENSE RENEWAL DATE IS DECEMBER 31,
I HEREBY CERTIFY THAT THIS ENGINEERING DOCUMENT WAS
PREPARED BY ME OR UNDER MY DIRECT SUPERVISION AND THAT I
AM A DULY LICENSED PROFESSIONAL ENGINEER UNDER THE LAWS
OF THE STATE OF IOWA.
PRINTED OR TYPED NAME
SIGNATURE DATE
LICENSE NUMBER
Edin Smailovic
Electrical items on ME sheets
21953
ELECTRICAL ENGINEER
01/09/2026
01/09/2026
T
TTT
M
B-2
B-1
ET-1
F-1
WH-1
REMOVE
EXPANSION TANK
EXISTING WATER
HEATER TO REMAIN
EXISTING FURNACE
TO REMAIN
2" NG
MDP
PANEL A
ED02
MD01
DISCONNECT AND REMOVE
EXISTING BOILER CONTROL
PANEL, REMOVE ASSOCIATED
DISCONNECT, CONDUIT AND
POWER WIRING BACK TO
PANEL A.
EXISTING THERMOSTATS,
PUMP RELAYS, ETC TO
REMAIN. REWIRE AS
REQUIRED TO ACCOMPLISH
SEQUENCE OF OPERATION
WITH NEW EQUIPMENT.
ELECTRICAL
MECHANICAL
MD01
ED02
ED01
MD02
B-1
B-2
PHWP-2
PHWP-1
ET-1
WH-1
F-1
GF-1
2" NG
EMERGENCY
BOILER SHUT
OFF BUTTON
AS-1
1" NG TO
EACH BOILER
EXISTING WATER
HEATER TO REMAIN
EXISTING FURNACE
TO REMAIN
SEE
SCHEM/DETAILS
MDP
PANEL A
E03
E02
E02
E04
E01
M01
E01
ELECTRICAL
MECHANICAL
M01
E04
M101
E3
M101
G3
2" NG
GARAGE
MECHANICS
BAY
MECHANICAL
WASH BAY
3ELECTRICAL
EXISTING MANIFOLD. REMOVE ALL
EXISTING VALVES TO ASSIST WITH PIPE
FLUSHING. REPLACE WITH NEW. NEW
VALVES TO MATCH EXISTING. (TYP. 4)
EXISTING
THERMOSTATS SHALL
REMAIN (TYP.)
EXISTING
GAS METER
C W
EXPANSION TANK
BOILER 1 BOILER 2
1/2"
1-1/4" HWS TO EXISTING
MANIFOLDS B AND C (GARAGE)
2"2"
1-1/4" HWR FROM EXISTING
MANIFOLDS B AND C (GARAGE)
1" HWS TO EXISTING
MANIFOLD D (MECHANICS BAY)
1" HWR FROM EXISTING
MANIFOLD D (MECHANICS BAY)
1" HWS TO EXISTING
MANIFOLD A (WASH BAY)
1" HWR FROM EXISTING
MANIFOLD A (WASH BAY)
1" HWS TO NEW BRINE BUILDING
3/4" HWR FROM BRINE BUILDING
AIR
SEPARATOR
3-WAY
TEMPERING
VALVE (TYP.)
ALL SHUT-OFF
VALVES IN
SYSTEM SHALL
BE REPLACED
(TYP.)
MD02
ED02
ED02
MD01
ED01
1-1/4" HWS TO EXISTING
MANIFOLDS B AND C (GARAGE)
2"
1-1/4" HWR FROM EXISTING
MANIFOLDS B AND C (GARAGE)
1" HWS TO EXISTING
MANIFOLD D (MECHANICS BAY)
1" HWR FROM EXISTING
MANIFOLD D (MECHANICS BAY)
1" HWS TO EXISTING
MANIFOLD A (WASH BAY)
1" HWR FROM EXISTING
MANIFOLD A (WASH BAY)
3/4" HWS TO NEW BRINE BUILDING
3/4" HWR FROM BRINE BUILDING
2"
B-1
M
IN
GAS
SUPPLY
PRESSURE
RELIEF VALVE
AIR
VENT
FULL SIZE TO
FLOOR DRAIN
B-2
NOTES:
1) ALL PIPING CONNECTIONS SHALL
CONFORM TO MANUFACTURER'S WRITTEN
RECOMMENDATIONS
2) CONDENSATE FROM EACH BOILER SHALL
BE RUN TO NEUTRALIZATION TANK
PROVIDED BY BOILER MANUFACTURER.
PIPING TO BOILER B-2 SIMILAR TO B-1
DRAIN VALVE AND CAP
2"
1-1/2"
1-1/2"
STRAINER W/ DRAIN
VALVE (TYP.)PHWP-1
BALANCING VALVE
SHUT-OFF VALVE (TYP.)
THERMOMETER
8" MAX
NEW AIR AND DIRT SEPARATOR
(AS-1). SEE DETAIL
T
NEW TEMPERATURE SENSOR SHALL CONTROL BOILER OUTLET
TEMPERATURES TO MAINTAIN THIS TEMPERATURE (UNDERFLOOR SUPPLY
TEMPERATURE) AT 95ºF (ADJ.).
PRIMARY HEATING LOOP SIZED FOR 30ºF DELTA T (110ºF-80ºF)
SECONDARY (UNDERFLOOR LOOPS)SIZED FOR 15ºF DELTA T (95ºF-80ºF)
EXISTING THERMOSTATS AND UNDERFLOOR RELAY CONTROL PANELS SHALL
REMAIN. THERMOSTATS SHALL TURN ON/OFF CORRESPONDING ZONE PUMPS.
COORDINATE SENSOR AND BOILER CONTROLS WITH EXISTING UNDERFLOOR
CONTROLS TO ACCOMPLISH THIS SETPOINT CONTROL. PROVIDE/MODIFY
WIRING AS REQUIRED.
EXPANSION TANK (ET-1). SEE
DETAIL
GLYCOL FEEDER (GF-1). SEE
DETAIL
ALL EXISTING VALVES IN
SYSTEM TO BE REPLACED
(TYP.)
SHUT-OFF VALVE (TYP.)
STRAINER W/ DRAIN
VALVE (TYP.)
NEW THERMOMETERS ON ALL
SUPPLY AND RETURNS TO/FROM
EACH ZONE (TYP.)
CHECK VALVE (TYP.)
HWP-4
HWP-3
HWP-2
HWP-1
1" NG PIPING FROM MAIN
ABOVE TO EACH BOILER
ONLY A PORTION OF THE BOILER PIPING IS
INSULATED AND MOST DOES NOT MEET
CURRENT CODES. CONTRACTOR SHALL
REMOVE ALL EXISTING INSULATION ON
BOILER PIPING IN THE MECHANICAL ROOM.
ALL EXISTING AND NEW HWS/HWR IN
MECHANICAL ROOM SHALL BE INSULATED
PER SPECS.
E04
E04
E04
E04
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NORTH
01/4" = 1'-0" E3
MECHANICAL DEMO PLAN
6'
NORTH
01/4" = 1'-0" G3
MECHANICAL NEW WORK PLAN
6'
KEYNOTES
KEY NOTE
E01 NEW BOILERS SHALL BE TIED INTO NEW EMERGENCY BOILER SHUTDOWN BUTTON.
E02 PROVIDE WIRING FROM BOILER TO ASSOCIATED BOILER PUMP.
E03 PROVIDE NEW 20A/1P BREAKER IN PANEL A TO DUPLEX GFI RECEPTACLE FOR NEW GLYCOL FEEDER. PROVIDE (2)#12, (1) #12 GND, 3/4" C.
EXISTING PANEL IS A SIEMENS PANEL.
E04 PROVIDE (2)#12, (1) #12 GND, 3/4" C TO NEW PUMP AND BOILER. RECONNECT TO EXISTING CIRCUIT. PROVIDE SINGLE POLE 20 AMP DISCONNECT
SWITCH FOR EACH CIRC PUMP/BOILER.
ED01 REMOVE ELECTRICAL CONNECTIONS FROM PUMP, DISCONNECT, CONDUIT, AND WIRING BACK TO PANEL A.
ED02 REMOVE POWER FOR BOILER/PUMP BACK TO JUNCTION BOX. SAVE CIRCUITS FOR RECONNECTION TO NEW BOILER/PUMP.
M01 3" VENT(S) AND 3" COMBUSTION AIR INTAKE(S) UP THRU ROOF. OFFSET IN CEILING SPACE AS REQUIRED TO INSURE VENTS ARE A MINIMUM DISTANCE OF 12' AWAY FROM PRECAST WALL FACES ON ROOF. INTAKES SHALL BE PVC AND VENTS SHALL BE POLYPROPYLENE AND SHALL BE APPROVED BY THE BOILER MANUFACTURER. VENTING AND INTAKES SHALL SLOPE BACK TOWARD BOILERS ACCORDING TO MANUFACTURER'S.
REQUIREMENTS. TERMINATE PER MANUFACTURER'S WRITTEN RECOMMENDATIONS. SEE DETAIL.
MD01 REMOVE EXISTING BOILERS, PUMPS, COMBUSTION/INTAKE VENTING, AND ALL ASSOCIATED CONTROLS. REMOVE PIPING AS SHOWN ON DEMO
SCHEMATIC.
MD02 REMOVE PUMP AND PREPARE PIPING FOR NEW CONNECTIONS. SEE BOILER PIPING NEW SCHEMATIC.
NORTH
01/16" = 1'-0" E6
OVERALL BUILDING PLAN
24'
NOT TO SCALEA3
BOILER PIPING DEMO SCHEMATIC
NOT TO SCALEA6
BOILER PIPING NEW SCHEMATIC
1. THIS DRAWING DIAGRAMMATICALLY REPRESENTS THE LAYOUT OF EXISTING CONDITIONS WITH MAJOR MECHANICAL AND ELECTRICAL COMPONENTS. ACCESSIBILITY TO DEMOLITION ITEMS SHALL NOT BE INFERRED. THE CONTRACTOR SHALL BE RESPONSIBLE FOR FIELD
VERIFICATION OF BUILDING AND EXISTING CONDITIONS, PRIOR TO BID SUBMISSION.
2. DEMOLTION SHALL INCLUDE ALL HANGERS, FITTINGS, DAMPERS, VALVES, ETC.
3. LIGHT LINES INDICATE EXISTING DUCT, PIPING, EQUIPMENTS, ETC. TO REMAIN. BOLD DASHED LINES INDICATE DEMOLITION WORK ON
THIS PROJECT.
4. CONTRACTOR SHALL PATCH/REPAIR ALL UNUSED OPENINGS AND MODIFIED FINISH SURFACES. PATCH SHALL MATCH MATERIALS, FINISH, AND TEXTURE OF ADJACENT SURFACES.
5. OWNER SHALL RETAIN FIRST SALVAGE RIGHTS TO ALL REMOVED EQUIPMENT AND MATERIALS. UNLESS NOTED OTHERWISE, CONTRACTOR SHALL BE REPONSIBLE FOR PROPER AND TIMELY DISPOSAL OF ALL CONSTRUCTION DEBRIS INCLUDING BUT NOT
LIMITED TO EQUIPMENT AND MATERIALS NOT CLAIMED BY OWNER.
GENERAL DEMOLITION NOTES
1. LIGHT LINES INDICATE EXISTING PIPING, DUCTWORK, EQUIPMENT, ETC. TO REMAIN. BOLD LINES INDICATE PIPING, DUCTWORK, EQUIPMENT, ETC.
TO BE INSTALLED BY THIS CONTRACT UNLESS NOTED OTHERWISE.
2. THE CONTRACTOR SHALL BE RESPONSIBLE FOR FIELD VERIFICATION OF THE BUILDING AND EXISTING CONDIITONS, PRIOR TO BID SUBMISSION.
COORDINATE ROUGH-IN AND FINAL LOCATION OF All EQUIPMENT WITH EXISTING LIGHTING, STRUCTURE, CONDUITS, HOSITS, ETC. PROVIDE OFFSETS AND/OR EASEMENTS, OR RELOCATE EXISTING AS REQUIRED TO AVOID CONFLICTS WITH INSTALLTION OF NEW WORK.
3. CONTRACTOR SHALL PATCH/REPAIR ALL UNUSED OPENINGS AND MODIFIED FINISH SURFACES. PATCH SHALL MATCH MATERIALS, FINISH, AND
TEXTURE OF ADJACENT SURFACES.
4. CONTRACTOR SHALL OPEN GYP CEILING AS REQUIRED TO REMOVE OLD BOILER VENT/FLUE AND TO INSTALL NEW VENT FLUE. PATCH CEILING TO
MATCH EXISTING SURFACE. PAINT TO MATCH.
5. CONTRACTOR SHALL PROVIDE RACKING/UNISTRUT AS REQUIRED TO MOUNT BOILERS IN ROOM.
6. THE EXISTING BOILERS HAVE BEEN FAILING AND IT IS BELIEVED TO BE LEAVING ACCUMULATED SETTLEMENT FROM IN THE HEATING WATER PIPING
SYSTEM. CONTRACTOR SHALL FLUSH/DRAIN ALL EXISTING HEATING WATER PIPING. FLUSH EACH PIPING RUN TO/FROM ALL THE EXISTING MANIFOLDS IN ADDITION TO ALL THE UNDERFLOOR PIPING DOWNSTREAM OF THE MANIFOLD BOXES IN ADDITION TO ALL THE PIPING MAINS. ALL VALVES ARE TO BE REMOVED TO ASSIST IN THE FLUSHING PROCESS. ALL VALVES TO BE REPLACED WITH NEW. SEE SPECIFICATIONS FOR
ADDITIONAL REQUIREMENTS.
GENERAL NOTES
P
HEATING WATER SUPPLYHWS
HEATING WATER RETURNHWR
TO BE DEMOLISHED
EXISTING TO REMAIN
8" PG PIPE SIZE, SYSTEM AND FLOW TAG
NEW CONNECTION INTO EXISTING PIPE OR DUCT
CAP EXISTING PIPE OR DUCT
KEYNOTE
THERMOSTATT
MECHANICAL SYMBOLS LEGEND
NATURAL GASNG
CW DOMESTIC COLD WATER
PIPE OFFSET DOWN
PIPE OFFSET UP
ELBOW DOWN
ELBOW UP6" PG UP
6" PG DN
PUMP
INVERT ECCENTRIC
REDUCER AS
REQUIRED
SHUTOFF VALVE SEE
SPECIFICATIONS FOR
TYPE (TYP)
STRAINER W/ BLOW
DOWN VALVE & CAP
IN-LINE PUMP
STRAIGHT
ECCENTRIC
INCREASER AS
REQUIRED
DIAMETERS
5 PIPE
PRESSURE GAUGE
WITH 1/4 TURN BALL
VALVES ON EACH
SIDE OF PUMP
BALANCING VALVE
DIAMETERS
5 PIPE
PROVIDE 1/2" STAINLESS SCREEN
ON INTAKE AND VENTS PER
MANUFACTURER'S WRITTEN
RECOMMENDATIONS
EXISTING
STANDING SEAM
METAL ROOF
NOTE: VENTING TERMINATION SHALL BE IN ACCORDANCE WITH EQUIPMENT
MANUFACTURER'S WRITTEN RECOMMENDATIONS
M
IN
(2) 90º ELBOWS
12" MIN AND 24" MAX
M
IN
EXTERIOR FACE
OF PRECAST
CONCRETE
WALL
12'-0" MIN
OFFSET VENTING AND INTAKE IN
CEILING SPACE AS REQUIRED TO
MEET CLEARANCES ON ROOF.
FLASHING SYSTEM FOR
PENETRATIONS SEAL TO METAL
ROOF SYSTEM (TYP.)
EXPANSION TANK
GLYCOL FEEDER
REMOVABLE HEAD
PRESSURE RELIEF
VALVE. ROUTE
RELIEF TO GLYCOL
FEED TANK
ANTI-SIPHON LOOP. TAP
LOOP OFF SIDE OF PIPE;
NOT TOP OR BOTTOM.
2" OR FULL SIZE CONNECTION
ON EXPANSION TANK IF
LARGER
AUTOMATIC
AIR VENT
AIR AND DIRT SEPARATOR W/
INTEGRAL AUTOMATIC AIR
VENT
3/4" HOSE THREAD
ADAPTOR (H.T.A.)
BALANCING VALVE
NOTE: ROUTE PRV/VENTS
TO GLYCOL FEEDER IN
MECH ROOM IN LIEU OF
FLOOR DRAIN
4" CONC PAD
3/4" H.T.A.
PRESSURE
GAUGE
TO GLYCOL
FEED PUMP
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1. PROVIDE MANUFACTURER'S CONDENSATE NEUTRALIZATION KIT FOR EACH BOILER.
REMARKS:
BOILER SCHEDULE - HOT WATER
MARK
SYSTEM
SERVED
CAPACITY (MBH) EFFICIENCY
EWT
(°F)
LWT
(°F) GPM MAX PD (FT) FUEL TYPE
OPERABLE GAS
PRESSURE RANGE
(X - X IN WC)
TURNDOWN
RATIO
ELECTRICAL
DATA
TUPIN TUPTUO SLTVO ESAHP SIASBN GSDIE
B-1 HEATING 180 171 95 75 105 11.3 15.5 NATURAL GAS 2.5 - 14 10:1 120 1 US BOILER UALTA 180
B-2 HEATING 180 171 95 75 105 11.3 15.5 NATURAL GAS 2.5 - 14 10:1 120 1 US BOILER UALTA 180
1. PUMP SHALL BE PROVIDED BY BOILER MANUFACTURER. PUMP IS POWERED THROUGH BOILER.
REMARKS:
MECHANICAL PUMP SCHEDULE
MARK SYSTEM SERVED TYPE GPM HEAD (FT)
SHUT OFF
HEAD (FT)
MOTOR DATA
DESIGN BASIS
APPLICABLE
REMARKSWATTS VOLTS PHASE RPM
HWP-1 MANIFOLD B AND C (GARAGE) INLINE 25 10 30 197 120 1 1750 GRUNDFOS UPS 26-99
HWP-2 MANIFOLD D (MECHANICS BAY) INLINE 10 19 28.5 197 120 1 1750 GRUNDFOS UPS 26-99
HWP-3 MANIFOLD D (WASH BAY) INLINE 7 21 28.5 197 120 1 1750 GRUNDFOS UPS 26-99
HWP-4 BRINE BUILDING INLINE 4 18 24.5 197 120 1 1750 GRUNDFOS UPS 26-99
PHWP-1 BOILER 1 PRIMARY PUMP INLINE 11 18 28.5 197 120 1 1750 GRUNDFOS UPS 26-99 1
PHWP-2 BOILER 2 PRIMARY PUMP INLINE 11 18 28.5 197 120 1 1750 GRUNDFOS UPS 26-99 1
NOT TO SCALED2
BOILER INTAKE/VENT DETAIL
NOT TO SCALED1
IN-LINE PUMP PIPING DETAIL
EXPANSION TANK SCHEDULE
MARK
SYSTEM
SERVED TYPE
TANK
CAPACITY
(GAL)
ACCEPTANCE
CAPACITY
(GAL)
RELIEF VALVE
DESIGN BASIS
RELIEF AT
(PSI) FILL AT (PSI)
ET-1 HEATING BLADDER 53 53 36 12 BELL AND GOSSETT B-200
NOT TO SCALED4
HYDRONIC ACCESSORIES DETAIL
AIR AND DIRT SEPARATOR SCHEDULE
MARK SYSTEM SERVED SIZE (IN)
CAPACITY
(GPM) STRAINER (Y/N) MAX PD (FT) DESIGN BASIS
AS-1 RADIANT HEAT 2 45 N 1 VDN200FA
3. FURNISH AND INSTALL ALL PUMP CONTROLS AND WIRING.
2. CONTRACTOR SHALL PROVIDE GFCI DUPLEX RECEPTICLE NEAR GLYCOL FEEDER FOR POWER.
1. FILL TANK WITH 30% PG. GLYCOL SHALL BE PREMIXED, NO FIELD MIXING SHALL BE ALLOWED.
REMARKS:
GLYCOL FEEDER SCHEDULE
MARK
SYSTEM
SERVED
TANK VOLUME
(GAL) % GLYCOL GPM
PRESSURE RANGES (PSI)
ELECTRICAL
DATA
NI TCU TUO TCU SLTVO ESAHP SIASBN GSDIE
GF-1 HEATING 17 30 1 0 18 240 1 AXIOM DMF300
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