ord-d-ald09r-g017.pdf
PDF 299 KB Posted
- Solicitation number
- 697DCK-20-R-00436
About this file
This document provides details for a federal contract solicitation for construction services for the establishment of NAVAIDS facilities serving an extended runway at O'Hare International Airport in Chicago, Illinois. The contractor shall provide all labor, materials, and equipment to perform the project in accordance with contract clauses, drawings, and specifications over a 605 calendar day performance period with an anticipated start date of November 15, 2020. The estimated price range for this procurement is between $5 million and $10 million. Interested firms must demonstrate successful completion of similar projects both in dollar amount and scope of work at an operational airport. Offers are due by October 7, 2020. Offerors must submit documentation including a cover letter, signed solicitation form, past performance references, a construction schedule, financial capability letter, liability insurance certificate, bonding letter, bid bond form, and small business subcontracting plan.
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Text version
o rd -d -a ld r-g .d g n
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T R S p e n c e r
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B
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8 7 6 5 4 3 2 1
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REVDRAWING NO
DATE JCN
APPROVED BY
ISSUED BY
CHECKED
DRAWN
DESIGNED
SUBMITTED BY
REVIEWED BY
FEDERAL AVIATION ADMINISTRATION
DEPARTMENT OF TRANSPORTATION
REV
DATE
APPROVED
DESCRIPTION JCN
DATE
REDLINE
APVD
A
1.
2.
(TO BE USED WHERE RELATIVELY LARGE GROUNDING SYSTEMS ARE INSTALLED)
THE RESIDENT ENGINEER.
PART OF THE PERMANENT FACILITIES FILES. THREE COPIES WILL BE PROVIDED TO
TOGETHER WITH THE RESISTANCE MEASUREMENT WORKSHEET (FIG 2) WILL BECOME
TO MONITOR AND/OR VERIFY THE EARTH ELECTRODE RESISTANCE TEST. THIS SKETCH
SIMILAR TO THAT SHOWN IN FIG. 1. AN FAA RESIDENT ENGINEER SHALL BE PRESENT
PREPARE A NEAT SKETCH OF THE FACILITY GROUND SYSTEM OF THE NEW FACILITY
NEW FACILITIES - A QUALIFIED ELECTRICIAN FURNISHED BY THE CONTRACTOR SHALL
3.
A.
THE ELECTRODE UNDER TEST.
CONNECT THE TERMINALS MARKED C1 AND P1 TOGETHER AND CONNECT THEM TO
B.
BE RUN 90 DEGREES TO ALS) KEEP C2 & P2 LEADS SEPARATED AS FAR AS POSSIBLE.
ILLUSTRATED IN FIG. 1 (FOR LONG SYSTEMS SUCH AS ALS. THE C2 PROBE LINE SHOULD
METALS. THEN LOCATE THE PROBE AS FAR AS POSSIBLE FROM THESE MATERIALS AS
SYSTEM FOR THE FACILITY AND DETERMINE THE LOCATION OF ALL SUCH BURIED
FOR PLACEMENT OF THR C2 PROBE, EXAMINE THE CONFIGURATION OF THE ELECTRODE
PIPES, POWER AND SIGNAL CABLES, FUEL TANKS ETC. IN CHOOSING THE DIRECTION
ELECTRODE UNDER TEST AND FROM THE OTHER BURIED METALS SUCH AS UTILITY
POSITION THE C2 PROBE ALONG A LINE WHICH MAXIMIZES THE DISTANCE FROM THE
C.
PLOT ENOUGH POINTS TO ACCURATELY DETERMINE WHERE CURVE LEVELS OFF.
62% OF THE C2 POSITIONS). IT MAY NOT BE NECESSARY TO PLOT THE FULL 500’.
READINGS FOR EACH C2 & P2 PROBE POSITION. (NOTE THAT THE P2 POSITIONS ARE
POSITION THE C2 PROBE AT DISTANCES AS SHOWN IN FIG. 3. RECORD THE METER
D.
CURVE LEVELS OFF. (SEE FIG.3)
CORRESPONDING C2 PROBE POSITIONS AS NECESSARY TO DETERMINE WHERE
NEXT. PLOT ON A GRAPH AS MANY RECORDED RESISTANCE READINGS VERSUS THE
E.
CURVE TO ITS ASYMPTOTIC VALUE.
THE TRUE VALUE OF RESISTANCE CAN BE ESTIMATED BY EXTRAPOLATING THE
C2
PROBE
DISTANCE
50’
100’
150’
200’
250’
300’
350’
400’
450’
500’
P2
PROBE
DISTANCE
(.62 X C2)
31’
62’
318’
279’
248’
217’
185’
154’
124’
93’
METER
READING
W
7.5
5.2
5.9
5.2
4.2’
3.4
3.8
3.4
3.4
3.1
POWER LINE
POTENTIAL
COIL
POTENTIAL
RESISTANCE
CIRCUIT
COIL
CURRENT
CURRENT
REVERSER
POTENTIAL
COMMUTATOR
C2
P2P1
C1
SWITCH
RANGE
DC GENERATOR
BEING TESTED
GROUND CONNECTOR
DEPTH OF REFERENCE RODS
RESISTANCE =
500’ 318’
279’450’
400’ 248’
217’350’
300’ 185’
154’250’
200’ 124’
93’150’
100’ 62’
31’50’
C2
PROBE
DISTANCE
P2
PROBE
DISTANCE
(.62 X C2)
RESISTANCE
METER
READING
W
50’ 100’ 150’ 200’250’300’350’400’450’500’
PROBE C2 LOCATION
R E
S
IS
T A
N C
E
W
PROBE C2 LOCATION
500’450’400’350’300’250’200’150’100’50’
R W
R E
S
IS
T A
N C
E
W
DEPTH OF REFERENCE RODS
RESISTANCE = 2.8 W
NOT TO SCALE
01 1 2
SCALE IN FEET
10.5597
REFERENCE
AUXILIARY OR
AND TURNED OVER TO THE FAA RESIDENT ENGINEER
BACKFILL. THE TEST RESULTS SHALL BE TABULATED
ALL GROUND RODS SHALL BE TESTED PRIOR TO
OR COUNTERPOISE
GROUND ROD FIELD
LINE CABLES
SIGNAL/CONTROL
RESISTANCE TEST ROUTE
C
P O
S
IT
IO
N S
1’
’15
S
IT
IO
N S
UTILITY LINES
ALTERNATE TEST ROUTE
TRUE R W = 2.8 W
LEVELS OFF.
TO ACCURATELY DETERMINE WHERE CURVE
THE FULL 500 FT. PLOT ENOUGH POINTS
IT MAY NOT BE NECESSARY TO PLOT
NOTE:
RESISTANCE
FAA FACILITY
ARRAY, RVR, AND PAPI FACILITY.
PROVIDE ONE COMPLETED SHEET FOR EACH ALSF, GLIDE SLOPE, LOCALIZER ANTENNA
(SUCH AS THE BIDDLE NULL BALANCE EARTH TESTER). PROCEED AS FOLLOWS:
WITH AN INSTRUMENT DESIGNED FOR THE PURPOSE USING THE FALL POTENTIAL METHOD
NEW AND EXISTING FACILITIES - MEASURE THE RESISTANCE OF THE ELECTRODE SYSTEM
NOT TO SCALE
FIG. 1, EARTH RESISTANCE MEASUREMENT AT A TYPICAL FACILITY
FIG. 2, RESISTANCE
MEASUREMENT WORKSHEETS
SCHEMATIC OF CONNECTORS
OF GROUND TESTERS
FIG. 3, SAMPLE OF A COMPLETED
RESISTANCE MEASUREMENT WORKSHEET
METHOD "B"
GRAPHIC SCALE
E D
M
IS
S
U E
D F
O R
NAVAIDS
IL
07/24/2019 1898272
ORD-D-ALD09R-G017
C
N S
T R
U C
T
IO
N
ENGINEERING SERVICES
ALD
CHICAGO O’HARE INTERNATIONAL AIRPORTCHICAGO
PROJECT ENGINEER MGR: ENGINEERING
o rd -d -a ld r-g .d g n
THIS DRAWING PRODUCED ON THE AGL REGION MICROSTATION SYSTEM
ATO - TECHNICAL OPERATIONS CENTRAL SERVICE AREA
RUNWAY 9R-27L NAVAIDS
EARTH RESISTANCE MEASUREMENT
RC
| 2020-07-02T13:23:00-0500 | |
| RAFAEL CRAME |
| 2020-07-09T12:36:23-0500 | |
| LUIS N DOMINGUEZ |
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