5. Mechanical.pdf
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- Attached to
- Repair B1840 Roof
- Solicitation number
- FA462626R0006
About this file
This document is a mechanical and plumbing design plan set for Building 1840 Roof repair at Malmstrom Air Force Base, Montana, prepared by engineer Lawrence J. Wyatt (PE No. 39050). The project involves demolition and remodeling of existing mechanical and plumbing systems on the roof, with detailed specifications for ductwork, ventilation, and associated equipment installations. Key components include two Loren Cook gravity ventilators (GV-3 sized 31"x27" with 600 CFM for AHU-3 intake, and GV-5 sized 59"x51" with 3600 CFM for AHU-12 intake), emergency exhaust fan systems, roof curb installations, and ductwork penetrations through the existing roof structure. The plans include mechanical legends, abbreviations, installation details, and scheduling information for various HVAC components including dampers, valves, duct specialties, and piping systems for domestic hot and cold water supply.
The contractor is responsible for compliance with all applicable federal, state, and local codes; securing required permits and inspections; means and methods of construction; and coordination between all construction disciplines. All construction activities must comply with OSHA standards and safety requirements. The document specifies that only one emergency exhaust fan system may be taken offline at any time during duct repairs, with work plans coordinated with the government minimum five working days in advance. Restricted area access protocols are mandated due to ongoing facility operations, with construction personnel required to remain within designated work zones and prohibited from entering restricted areas without government authorization and escort. The plans are presented at 1/32"=1'-0" scale with detailed cross-sections, installation specifications, and coordination notes for roofing assembly repairs and sealing.
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Text version
SYMBOL DESCRIPTION
MECHANICAL LEGEND
DESCRIPTIONABBREVIATIONS
MECHANICAL ABBREVIATIONS
ITEMS SHOWN BOLD AND SOLID ARE NEW
ITEMS SHOWN LIGHT ARE EXISTING AND TO REMAIN
GUIDE TO LINEWEIGHTS AND LINETYPES FOR MECHANICAL ITEMS
INDICATES SPACE TO BE REMODELED UNDER THIS PROJECT
ITEMS SHOWN BOLD AND DASHED ARE TO BE REMOVED
P
R
GW
THERMOSTAT/SENSOR
THERMOMETER
HOSE BIBB
INSTRUMENT GAUGE WELL
(PETE'S PLUG)
PRESSURE GAUGE
RELIEF VALVE
GRILLE OR DIFFUSER MARK
PLUMBING FIXTURE MARK
MECHANICAL
(CONTRACTOR)
VOLUME DAMPER
WALL CLEANOUT
VENT THROUGH ROOF
VD
WCO
VTR
TYP TYPICAL
MECH.
ROOM NUMBER
XX
XXXX SECTION REFERENCE
DETAIL REFERENCE
BALANCE CFM
NOTE DESIGNATION
GENERAL MECHANICAL SYMBOLS
ARCHITECTURAL PLANS
AFF ABOVE FINISH FLOOR
FCO
CO
ARCH.
FLOOR CLEANOUT
CLEANOUT
ARCHITECT OR
(ELEVATION)
AD ACCESS DOOR
CLEANOUT TO GRADECOTG
EXHAUSTEXH
EXHAUST AIREA
SUPPLY AIRSA
OUTSIDE AIROA
RETURN AIRRA
TRANSFER AIRTA
MANUFACTURERMFR
STRAINER (W/BLOWDOWN)
PIPE FITTINGS AND SPECIALTIES
VALVE IN VERTICAL PIPE
GATE VALVE OR BALL VALVE
CHECK VALVE
BALL VALVE
CONCENTRIC REDUCER
PIPE DOWN
UNION
PIPE UP
FLOW BALANCE DEVICE
PIPE TEE UP
PIPE TEE DOWN
WATER HAMMER ARRESTOR (WHA)
DUCT WORK AND SPECIALTIES
M MOTORIZED DAMPER
TURNING VANES
RADIUSED ELBOW
RADIUSED ELBOW
W/ TURNING VANES.
FLEXIBLE DUCT CONNECTION
RECTANGULAR DUCT TAKEOFF
(FIRST FIGURE INDICATES
12"x8"
WITH VOLUME DAMPER
FACING SIDE)
CONICAL SPIN-IN WITH
ACCESS DOOR
AD
VD
VOLUME DAMPER
SHEET METAL DUCT
VOLUME DAMPER
VD
ACOUSTICALLY LINED DUCT
HIGH EFFICIENCY TAKEOFF
VD
W/ VOLUME DAMPER
VD
ROUND ELBOW
FIRE/SMOKE DAMPER
FSD
DOMESTIC HOT WATER (POTABLE)
DOMESTIC COLD WATER (POTABLE)
SPECIAL EQUIPMENT DRAIND
PIPING SYMBOLS
DHR
DHW
DOMESTIC HOT WATER
RECIRCULATION (POTABLE)
FTU FAN TERMINAL UNIT
HEATING WATER SUPPLY/RETURNHWS/R
SYMBOL DESCRIPTION
MECHANICAL LEGEND
DCW
A. ALL CONSTRUCTION ACTIVITIES SHALL COMPLY WITH ALL APPLICABLE FEDERAL, STATE AND LOCAL CODES, ORDINANCES, STANDARDS, REGULATIONS, AND CRITERIA.
B. THE CONTRACTOR SHALL BE RESPONSIBLE FOR SECURING ALL REQUIRED PERMITS AND INSPECTIONS. MECHANICAL CONTRACTOR SHALL DETERMINE METHODS, PHASING, AND
SEQUENCE OF MECHANICAL WORK TO SATISFY CONTRACT DOCUMENT REQUIREMENTS.
C. THE CONTRACTOR IS RESPONSIBLE FOR THE MEANS AND METHODS OF CONSTRUCTION AND ALL JOB RELATED SAFETY STANDARDS SUCH AS OSHA. IT IS THE CONTRACTOR'S
RESPONSIBILITY TO BE FAMILIAR WITH THE WORK REQUIRED IN THE CONSTRUCTION DOCUMENTS AND THE REQUIREMENTS FOR EXECUTING IT PROPERLY.
D. CHANGES OR DEVIATIONS FROM THE DRAWINGS MADE WITHOUT WRITTEN CONSENT OF THE GOVERNMENT ARE NOT PERMITTED. COORDINATE ANY NECESSARY MODIFICATIONS WITH
THE GOVERNMENT PRIOR TO COMMENCEMENT OF THE WORK IN QUESTION.
E. ALL CONTRACTORS PERFORMING THE WORK ENCLOSED IN THIS PLAN SET SHALL BE SOLELY RESPONSIBLE FOR THE COORDINATION OF THIS WORK BETWEEN ALL OTHER DISCIPLINES.
F. IN CASE OF DISCREPANCIES BETWEEN THE GENERAL NOTES, CONTRACT DOCUMENTS, SPECIFICATIONS AND REFERENCE STANDARDS, THE GOVERNMENT SHALL DETERMINE WHICH
SHALL GOVERN.
G. UNLESS SPECIFICALLY INDICATED BY NOTATION "NO SUBSTITUTES" THE EQUIPMENT FOR THIS PROJECT AS SCHEDULED ON THE DRAWINGS CONSTITUTES THE BASIS FOR DESIGN AND IS
ELIGIBLE FOR SUBSTITUTION IN ACCORDANCE WITH THE PROVISIONS OF PROJECT SPECIFICATIONS AND GENERAL CONDITIONS OF THE CONTRACT.
H. SUBMITTALS: SUBMIT COMPLETE MANUFACTURER'S DATA FOR ALL EQUIPMENT SCHEDULED, SPECIFICALLY INDICATING ALL PROPOSED EQUIPMENT AND OPTIONS. COMPLY WITH ALL
GENERAL SUBMITTAL REQUIREMENTS AS FOUND IN THE PROJECT SPECIFICATIONS.
I. INSTALLATION:
a. PREWORK: MECHANICAL CONTRACTOR SHALL REVIEW AND VERIFY ALL DIMENSIONS PRIOR TO WORK. REPORT ANY OBSERVED AMBIGUITY, OMISSION, OR ERROR, IN WRITING, AT
ONCE TO THE GENERAL CONTRACTOR.
b. SEQUENCING: MECHANICAL CONTRACTOR SHALL DETERMINE METHODS, PHASING, AND SEQUENCE OF MECHANICAL WORK TO SATISFY CONTRACT DOCUMENT REQUIREMENTS.
c. CLEANING: THE CONTRACTOR SHALL, AT ALL TIMES, KEEP THE PREMISES FREE FROM ACCUMULATION OF WASTE MATERIALS OR RUBBISH CAUSED BY THEIR WORK.
SUBCONTRACTORS SHALL REMOVE ALL RUBBISH, TOOLS, SCAFFOLDING AND SURPLUS MATERIALS AND LEAVE THE JOB IN A BROOM CLEAN CONDITION. ALL FIXTURES, EQUIPMENT, GLAZING, FLOORS, ETC., SHALL BE LEFT CLEAN AND READY FOR OCCUPANCY UPON COMPLETION OF THE PROJECT.
PROJECT NOTES
STATIC PRESSURE IS IN INCHES WATER COLUMN, DATUM ELEVATION OF 3,600 FT.
HOODTHROATHOODCURB CAPTHROATTYPEMODEL
MFRNO.
SIZE - INCHES
S.P.CFM
NOTES
ALUMINUM GRAVITY RELIEF VENTILATOR OF BOLTED AND WELDED CONSTRUCTION, A RADIUS THROAT FOR OPTIMUM PERFORMANCE, LIFT LUGS, RAIN GUTTER, TO PREVENT RAIN INFILTRATION, CONTINUOUSLY WELDED CURB CAP CORNERS FOR LEAK PROTECTION. PROVIDE WITH ALUMINUM BIRDSCREEN AND ELECTROSTATICALLY APPLIED BAKED POLYESTER POWER COATING. COORDINATE CURB CAP CONSTRUCTION SIZE WITH EXISTING ROOF CURB TO BE REPAIRED UNDER THIS PROJECT.
GV
3 3-- 31"x27" INTAKE FOR EXISTING AHU-3, WEIGHT = 97LB1
GRAVITY VENTILATOR SCHEDULE
LOREN
COOK
VENTILATOR
GI DUCTED
INTAKE
FREE AREA SQ-FT AIR FLOW
600 0.015
GV
INTAKE FOR EXISTING AHU-12, WEIGHT = 186 LB1LOREN
COOK GI DUCTED
INTAKE
3600- 10.75- 0.04559"x51"
12"x12"
30"x30"
EMERGENCY EXHAUST FANEEF
GLOBAL STRIKE COMMAND
MALMSTROM AIR FORCE BASE, MONTANA
LAWRENCE J.
WYATT
No. 39050 PE
1 MECHANICAL AND PLUMBING ROOF DEMOLITION PLAN
SCALE: 1/32"=1'-0"
160 8 32 48 64 12896 N
GLOBAL STRIKE COMMAND
MALMSTROM AIR FORCE BASE, MONTANA
GENERAL NOTE:
RESTRICTED AREA ACCESS: ACCESS TO PORTIONS OF THE ROOF WILL BE RESTRICTED AT CERTAIN TIMES DUE TO OPERATIONS WITHIN THE FACILITY. CONSTRUCTION PERSONNEL MUST REMAIN WITHIN THE DESIGNATED CONSTRUCTION LIMITS AT ALL TIMES, AS DETERMINED BY THE GOVERNMENT, AND MUST NOT ENTER INTO OR ABOVE RESTRICTED AREAS. MOVEMENT OUTSIDE APPROVED WORK ZONES IS PROHIBITED UNLESS AUTHORIZED AND ESCORTED BY GOVERNMENT PERSONNEL. VIOLATIONS OF THIS REQUIREMENT MAY RESULT IN IMMEDIATE REMOVAL FROM THE PROJECT SITE. REGULARLY OCCURRING PROJECT SCHEDULE MEETINGS WILL BE HELD IN ORDER TO COORDINATE WORK AREAS AND RESTRICTED AREAS.
LAWRENCE J.
1 MECHNICAL AND PLUMBING ROOF REMODEL PLAN
SCALE: 1/32"=1'-0"
160 8 32 48 64 12896 N
GLOBAL STRIKE COMMAND
MALMSTROM AIR FORCE BASE, MONTANA
GENERAL NOTE:
RESTRICTED AREA ACCESS: ACCESS TO PORTIONS OF THE ROOF WILL BE RESTRICTED AT CERTAIN TIMES DUE TO OPERATIONS WITHIN THE FACILITY. CONSTRUCTION PERSONNEL MUST REMAIN WITHIN THE DESIGNATED CONSTRUCTION LIMITS AT ALL TIMES, AS DETERMINED BY THE GOVERNMENT, AND MUST NOT ENTER INTO OR ABOVE RESTRICTED AREAS. MOVEMENT OUTSIDE APPROVED WORK ZONES IS PROHIBITED UNLESS AUTHORIZED AND ESCORTED BY GOVERNMENT PERSONNEL. VIOLATIONS OF THIS REQUIREMENT MAY RESULT IN IMMEDIATE REMOVAL FROM THE PROJECT SITE. REGULARLY OCCURRING PROJECT SCHEDULE MEETINGS WILL BE HELD IN ORDER TO COORDINATE WORK AREAS AND RESTRICTED AREAS.
LAWRENCE J.
INSULATED ROOF CURB
FOR INSTALLATION SEE
ROOF DECK
ROOF INSULATION
EXISTING ROOF STRUCTURE
EXISTING EMERGENCY EXHAUST DUCTWORK
INSULATE DECK PENETRATION TO FILL ANNULAR SPACE
EXISTING ROOFING ASSEMBLY, FOR PATCH,
SEALING AND REPAIR DETAILS SEE STRUCTURAL.
NEW SHEET METAL FLASHING - SECURE TO CURB
AND DUCTWORK, SEAL AROUND PERIMETER
REPAIRED/SEALED/NEW ROOFING
MEMBRANE, SEE STRUCTURAL DETAILING
NEW WOOD NAILER ON REUSED
CONCRETE ROOF CURB, SEE
STRUCTURAL (TYPICAL)
TRANSITION FROM
NEW TO EXISTING
DUCTWORK BELOW
CURB LINE.
NOTE:
ONLY 1X EMERGENCY EXHAUST FAN SYSTEM MAY BE TAKEN OFFLINE AT ANY ONE TIME
WHEN PERFORMING THE DUCT REPAIRS. COORDINATE WORK PLAN AND TIMING WITH
GOVERNMENT MINIMUM OF 5 WORKING DAYS AHEAD.
GLOBAL STRIKE COMMAND
MALMSTROM AIR FORCE BASE, MONTANA
LAWRENCE J.
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