Attachment 03 - Questions and Answers.pdf

Bid Ques on and Answers

1. The details for in-pavement taxiway edge lights and elevated edge lights on plan page EA501 both show a 2” PVC drainpipe being installed to the under drain. Will a 2” PVC drainpipe and connec on to the under drain be required for all new elevated and in-pavement base-cans being installed? If not, can under drain connec on loca ons be shown on plan pages EA121 and EA122?

A1 Yes, all lights should be connected to the underdrain trench. The drainpipe from the lights do not need to connect to the underdrain pipe itself, but the drainpipe shall be installed so the end of the drainpipe ends inside the underdrain trench and fabric.

2. Note 4 on EA101 and note 1 on EA121 both detail the reinstalla on of exis ng fixtures and signs on new bases. Note 4 detail #1 on plan page EA501 describes the installa on of new edge lights. There are no clear designa ons in the electrical removal or electrical layout plans for exis ng signs and/or light fixtures to be preserved and reinstalled. Will the contractor be required to salvage and reinstall any signs and/or light fixtures? If so, how many? Can a designa on be provided for exis ng signs and exis ng light fixtures that are slated to be removed and reinstalled on new bases?

A2 Note 4 on EA101 states all fixtures and signs should be removed and preserved for reinstalla on. If there is a difference between the salvaged lights and proposed, the difference should be made up with new light fixtures. The salvaged light fixtures and transformers should be installed per details including in the plan set. Electrical Removal Plans EA 101 and EA 102 indicate by note and X through the fixture which lights and signs are to be removed. The Contractor is responsible for quan es.

3. The elevated edge light fixture detail on plan page EA501 shows a L-868 two-piece light base can being used. Can a telescoping L-867 base can be used in lieu of a two-piece L-868 base can?

A3 Two piece L-867 base cans can be used for elevated edge light fixtures. See revised detail 1 on EA501 for updated detail illustra ng the change.

4. There is an electrical manhole slated to receive eleva on adjustments on plan page EA101 and EA121. What are the requirements for this adjustment? Can details be provided?

A4 The electrical manhole is a 4’ x 4’ concrete manhole with a cas ng poured into the lid. It is the assump on that the contractor shall:

- remove the lid

- clean and prep top of concrete manhole

- drill and epoxy rebar into sidewall to lock sidewall extension together similar to electrical manhole detail in plan set

- form up and pour sidewalk extensions to appropriate grades

- reset the lid on top.

5. Does note #4 on EA121 pertain to all manholes and handholes on the airfield property, or only the manholes and handholes within this project scope?

A5 Only manholes and handholes within the project limits.

6. What are the costs for contractor badging, background check, and driving training?

A6 There are no costs associated with badging, background checks, and/or driver training.

7. Drawing sheets CS131 and CS132 are tled as Exis ng Contours and U li es. It appears that some of these contours are proposed rather than exis ng. For example, at sta on 16+50, 200’ R offset, drawing CS131 shows an exis ng eleva on of ~246’; whereas the cross sec on on CX304 and contours on BB101 show an exis ng eleva on of ~ 240’. Please clarify and update drawings as needed.

A7 Sheets CS131 and CS132 have been updated to show the exis ng contours correctly.

8. The exis ng contours for the viewport near South Carolina Road do not match on drawing sheets CS131 and CG111. The limits of the viewports also appear to be different. Please clarify and update drawings as needed.

8A Sheet CS131 has been updated to match viewport limits on shown on sheet CG111 .

9. Contractors who have performed recent airfield paving projects on the runway and associated taxiways at McEn re JNGB have experienced challenges and schedule impacts to re-work the exis ng subgrade materials to achieve specified densi es in an efficient manner. The standard prac ce of protec ng exposed subgrade materials during construc on and maintaining a well-draining site to keep soil materials sufficiently dry does not appear to be an effec ve solu on given the exis ng soil condi ons and precipita on history at this loca on. Will the government consider lime or cement stabiliza on measures to be included in the contract documents vs.

requiring the contractor to include these costs in their bid at their own op on?

9A From the Phase II project geotechnical inves ga on and soil borings and past project experiences, cement/lime treatment of the subbase is not an cipated to be required.

10. With respect to the In-pavement fixtures that are being reinstalled:

Please confirm that the in-pavement fixtures are 8” diameter units with 2 hold down bolts.

We assume this to be the case from detail 2 on sheet EA501.

10A There are no in-pavement fixtures to be reinstalled. The in-pavements lights are new in-pavement lights.

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NOTES:

1. REFER TO SHEETS EA101 AND EA102 FOR ELECTRICAL

REMOVAL PLANS.

CONTINUATION OF VIEWPORT

FROM LOWER RIGHT OF THIS

SHEET

SEE INSERT VIEWPORT FOR

ADDITIONAL PROJECT AREA

LOCATED OFF OF THIS SHEET

NEAR S. CAROLINA ROAD

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EA501

NOTES:

1. INSTALL CORNER EDGE OF SNOW PLOW RING FLUSH WITH PAVEMENT SURFACE WITH A TOLERANCE OF +0", -1/16".

2. SUBMIT ALL BASE CAN INSTALLATION TECHNIQUES, METHODS, MATERIALS, ETC., TO THE GOVERNMENT FOR

REVIEW AND APPROVAL PRIOR TO THE START OF WORK.

3. BEFORE BACKFILLING AROUND THE BASE CANS, THE CONTRACTOR MUST DEMONSTRATE TO THE GOVERNMENT

THAT THE BASE CANS ARE AT THE CORRECT LOCATION, ELEVATION, AZIMUTH, AND ROTATION.

4. PROTECT THE FINISHED PAVEMENT SURFACE FROM FOREIGN SUBSTANCES WHICH COULD CAUSE STAINING, I.E., CONCRETE, OIL, ETC.. THE CONTRACTOR MUST IMMEDIATELY CLEAN ALL SPILLS AND CORRECT/CLEAN ANY

STAINED SURFACES AT NO ADDITIONAL COST TO THE GOVERNMENT.

5. THE BASE CAN COVER MOUNTING BOLTS MUST EXTEND THRU THE BASE CAN MOUNTING FLANGE INTO THE BASE

CAN A MINIMUM OF 0.5". THE BOLTS MUST BE THREADED THE FULL LENGTH OF THE BOLT.

6. CONCRETE AROUND BASE CANS AND DUCT/CONDUIT MUST BE COMPLETELY CONSOLIDATED BY MECHANICAL

MEANS AND FREE OF ANY VOIDS.

7. CONNECT LOCAL GROUND ROD TO BASE CANS. ROUTE COUNTERPOISE AROUND BASE CANS.

8. INSTALL TOP OF EDGE OF SNOW PLOW RING FLUSH WITH PAVEMENT SURFACE WITH A TOLERANCE OF +0", -1/16".

9. IF THE DISTANCE BETWEEN THE EDGE OF THE SNOW RING AND CONCRETE IS 1/8" OR LESS, SEAL TOP OF OPENING

WITH P-605 SEALANT AND DISREGARD THE P-606 COMPOUND.

10.THE TOP OF FIXTURE MUST NOT EXCEED THE TOP OF THE SNOW PLOW RING (+0, -1/8").

11.INSTALL FINISHED SURFACE OF CONCRETE BEAM FLUSH WITH ADJACENT PAVEMENT (+0, -1/16").

3/8" -16 CERAMIC FLUOROPOLYMER COATED STEEL

BOLT AND 2 PIECE LOCKWASHER (TYP)

P-606 RIGID SEALANT

(NOTE 9)

L-868, SIZE B, CLASS

1A BASE CAN

SNOW PLOW RING

(NOTE 1)

PAVEMENT SURFACE,

SLOPE PER CIVIL PLANS

O-RING

IN GROOVE

TOP EDGE OF IN-PAVEMENT

LIGHT FIXTURE (NOTE 10)

SEALANT FAA P-605

(NOTE 9)

FACTORY ATTACHED

FIXTURE GROUND LUG

(BY LIGHT FIXTURE

MANUFACTURER)

BRAIDED COPPER

GROUND STRAP

NOTE 1

NOTE 10

SNOW PLOW RING

1/4" (6mm)

MAX

TYPICAL (FAA CLASS 2)

IN-PAVEMENT FIXTURE

L-823 SECONDARY

CONNECTOR (STYLE 8)

PROVIDE 3'-0" OF

SLACK CABLE TO

PERMIT

CONNECTION OF

PRIMARY LEADS TO

BE MADE ABOVE

GROUND

COPPER CONNECTOR.

ONE PER CONDUCTOR,

BOLTED TO INTERNAL

GROUND LUG

GROUND

LUG

GROUND STRAP

(NOTE 1)

INTERNAL GROUND LUG

ISOLATION

TRANSFORMER

FIXTURE SHALL BE INSTALLED SUCH THAT THE

FIXTURE EDGE IS +0" AND -1/16" FROM THE

PAVEMENT TOP

DETAIL 2, THIS SHEET

CABLE #8, 5 KV L-824-TYPE C

PER PLAN (TYPICAL)

L-868, SIZE B, CLASS IA

LIGHT BASE

BRICK OR PVC STAND,

DO NOT BLOCK DRAIN

NEOPRENE GROMMET

WHERE SPECIFIED

2" SCH 40 PVC

CONDUIT (PER

PLAN)

2" THREADED HUB

PAVEMENT

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L-823 PRIMARY

CONNECTOR

(TYP)

EXTERNAL GROUND LUG

SEE DETAIL 5/EA503

SEE DETAIL 5/EA503

2" PVC DRAIN

PIPE TO UNDER

DRAIN

EXOTHERMIC WELD

6"

1'-0" FLEXIBLE 2"

PVC CONDUIT,

(TYP. BOTH SIDES)

NOTES:

1. PROVIDE 48" BRAIDED COPPER GROUND STRAP BETWEEN LIGHT BASE CAN AND LIGHT FIXTURE. STRAP MUST

BE EQUIVALENT TO NO. 6 CABLE.

2" SCH 40 PVC

CONDUIT

(PER PLAN)

ISOLATION

TRANSFORMER

GROUND STRAP

(NOTE 3)

FLEXIBLE

PAVEMENT

2'-0" ROUND DIAMETER

ELEVATED

EDGE LIGHT

(NOTE 4)

L-823 SECONDARY

CONNECTOR

(STYLE 8)

COPPER CONNECTOR,

ONE PER CONDUCTOR,

BOLTED TO INTERNAL

GROUND LUG

2" PVC DRAIN

PIPE TO UNDER

DRAIN

BRICK OR PVC STAND,

DO NOT BLOCK DRAIN

L-867, SIZE B, CLASS IA,

2 SECTION LIGHT BASE

NEOPRENE GROMMET

5 KV CABLE, L-824 TYPE

C, SIZE PER PLAN (TYP)

PROVIDE 3'-0" OF SLACK

CABLE TO PERMIT

CONNECTION OF PRIMARY

LEADS TO BE MADE

ABOVE GROUND

L-823 PRIMARY

CONNECTOR (TYP)

CONNECT TO GROUND

ROD (NOTE 2)

PROVIDE FLEXIBLE LIQUID

SEALER (P-605) BETWEEN

FLANGE RING AND

PAVEMENT

2" THREADED HUB

GROUND LUG

6"

MIN

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EXTERNAL

GROUND LUG

INTERNAL GROUND LUG

CONNECT TO REBAR

CAGE (NOTE 2)

EXOTHERMIC WELD

6"

1'-0" FLEXIBLE 2"

PVC CONDUIT,

(TYP. BOTH SIDES)

NOTES:

1. STANDARD HEIGHT IS 14". CONTRACTOR SHALL MATCH EXISTING CONDITIONS IN THE FIELD.

2. SEE DETAIL 1/EA503 FOR GROUNDING INFORMATION.

3. PROVIDE 48" BRAIDED COPPER GROUNDING STRAP EQUIVALENT TO #6 WIRE.

4. PROVIDE TYPE L-862 WHITE-YELLOW OR WHITE-WHITE FIXTURES FOR RUNWAY EDGE LIGHTS AND TYPE

L-861T(L) BLUE OR YELLOW FIXTURES AS INDICATED ON PLANS FOR TAXIWAY EDGE LIGHTS. WHITE SIDE OF

RUNWAY FIXTURE SHALL FACE TOWARDS THE NEAREST THRESHOLD BAR.

REINFORCING

BAR CAGE, SEE

DETAIL 2/EA503

EA501 EA121

IN-PAVEMENT TAXIWAY

EDGE LIGHT DETAIL

NOT TO SCALE

EA501 EA501

IN-PAVEMENT EDGE

LIGHT MOUNTING HARDWARE

NOT TO SCALE

EA501 EA121

ELEVATED EDGE

LIGHT FIXTURE DETAIL

NOT TO SCALE

NO. 2 STONE

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48" x 48"

2"

6"

60"

TOP VIEW

SIDE VIEW

NEENAH FOUNDRY NO. R3498-P2S

FRAME & COVER OR APPROVED EQUAL

CONDUITS AS SHOWN

NO. 4 BARS

5" C - C

4 - 4" PVC STUBS

CAP STUBS

ON SIDES NOT USED

NO. 4 BARS

6" C - C

INSTALL CONDUITS AS SHOWN

6"

CONDUITS

AS SHOWN

DUCT CROSSING

(SEE SHEET EA121 AND EA122)

INSTALL 4 - 4" DUCT STUBS

WITH CAPS ON SIDES

NOT USED

4 - 4" PVC STUBS, CAP STUBS

ON SIDES NOT USED

INSTALL CONDUITS

AS SHOWN

TYPICAL ELECTRICAL MANHOLE

NOT TO SCALE

EA501 EA121

ELECTRICAL MANHOLE NOTES

1. ELECTRICAL MANHOLES SHALL BE PLACED ON A BED OF MATERIAL AT LEAST 6 INCHES IN DEPTH, WHICH

MEETS REQUIREMENTS OF GRADED CRUSHED AGGREGATE BASE COURSE. THIS BEDDING SHALL BE

COMPACTED AND PROVIDE UNIFORM SUPPORT FOR THE ENTIRE AREA OF THE BASE. CONCRETE SHALL

CONFORM TO SECTION 03 30 53.

2. ELECTRICAL MANHOLES TO BE DESIGNED FOR MINIMUM AIRCRAFT LOADING OF 75,000 LBS WITH A

CONTACT PRESSURE OF 250 PSI. CONTRACTOR TO PROVIDE DESIGN FROM LICENSED ENGINEER THAT

INLET DESIGN MEETS LOADING REQUIREMENTS.

3. ALL NEW ELECTRICAL MANHOLES SHALL HAVE AIRCRAFT RATED SOLID LIDS WITH THE FRAME AND LID AS

SHOWN BELOW OR APPROVED EQUAL. FRAME TO BE BOLTED/ FASTENED FLUSH TO INLETS.

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