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INSTALLATION OF IN-PAVEMENT LIGHTS IN CONCRETE PAVEMENT & IMPACT ON LIGHT PHOTOMETRICS. Ornulv (Arnie) Sonsteby, PE & Doron Lean. Penn State / FAA Airport Conference 2007. IPRF-03-1 Project. Best Practices Guide for In-Pavement Lighting, PCC Pavement . Estimated Completion: 2007

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installation of in pavement lights in concrete pavement impact on light photometrics
INSTALLATION OF IN-PAVEMENT LIGHTS IN CONCRETE PAVEMENT & IMPACT ON LIGHT PHOTOMETRICS

Ornulv (Arnie) Sonsteby, PE

&

Doron Lean

Penn State / FAA Airport Conference 2007

iprf 03 1 project
IPRF-03-1 Project

Best Practices Guide for

In-Pavement Lighting, PCC Pavement

Estimated Completion:2007

PI & Contact:Ornulv (Arnie) Sonsteby, P.E.

email:osonsteby@burns-group.com

Sponsored by:FAA, in Cooperative Agreement with

Innovative Pavement Research Foundation (IPRF)

guide content
GUIDE CONTENT
  • Coordination between disciplines
  • Installation in new vs. existing PCC
  • Products, methods, tolerances
  • Boxouts / blockouts
  • Deficiencies and corrective alternatives
  • Strength and load transfer
slide5

Light Base Installation

  • “Anchor” function (preparation for paving)
  • (b) “Strengthening” function (completed installation)
installation issues
INSTALLATION ISSUES
  • Coordination between disciplines
  • Selecting:
    • Methods & procedures
    • lighting products
    • Pavement materials
  • Tolerances & verification
ccoordination in design
CCOORDINATION IN DESIGN
  • Light location vs. pavement joints
  • Materials and method
  • QC/QA
  • Tolerances and Consequences
pcc joint conflicts
PCC JOINT CONFLICTS
  • Touch Down Zone Lights
  • Lead-off / Lead-on TW CTL Lights
  • TW CTL Lights at curves / intersections
  • In-pavement RGL / Stop Bar Lights
materials methods
MATERIALS & METHODS
  • Light Base, Conduit, Pavement materials
  • Installation procedures and “structure” -- in new or existing pavement
  • Surface finish (“cookie cutter” vs. Core)
qc qa
QC / QA

The quality of installation depends on:

  • Good design by engineer
  • Good craftsmanship by installer
  • Close coordination between disciplines
  • Inspection / verification of compliance
tolerances and consequences
Tolerances and Consequences
  • Pavement vs. Base tolerances
  • Light Base: Location, Height, Azimuth, Level
  • When to modify, when to replace
slide12

Light Tolerances

Location:Per AC. Depends on type and function of light.

Height:Fixture edge even with pavement, (low side): +0”, -1/16.

Azimuth:Within ± ½ degree.

Level:With horizon. No tolerance specified.

** Paving elevation tolerance -- + ½”

slide13

Level Tolerance?

  • Pavement has longitudinal grade & cross slope (up to 1.5% major R/Ws)
  • No tolerance in AC. Engineer may establish tolerance (varies)
  • Tolerance applied in wrong direction worsens condition
  • Consider 
slide14

Ht D Ht D

Deg Grade for 12” for 6”

O

1/2 0.9% 0.1” 0.05”

O

1 1.75% 0.2” 0.1”

Level !!

TRANSVERSE SLOPE

LONGITUDINAL GRADE

coordination in construction
COORDINATION IN CONSTRUCTION
  • Survey
  • Materials and method
  • QC/QA
  • Tolerances and Consequences
slide16

Survey

  • Coordinate survey activities
  • Survey to:
    • Locate light
    • Install light base
    • Verify before paving
selecting materials methods
Selecting Materials & Methods
  • Submittals review for compliance
  • Establish installation sequence and responsibilities
  • Inspection --- more inspection
  • Protect lights while completing paving
slide18

Light base

Conduit in pavement base layer

Setting base “in space”

slide19

Setting bases in

“fill-in” lane

qc qa21
QC / QA
  • Verify light location
  • Verify height, azimuth & level while securing light base
  • Check tolerances prior to paving
  • Inspect surface finish
  • Protect light while paving, grooving, sweeping, and marking
slide22

2’ from Joint Issue

  • AC 150/5340-30

R/W CTL: “The line of lights is offset a maximum of 2’ from the runway centerline to the edge of fixture.”

T/W CTL: “Fixtures should be installed so that their nearest edge is approximately 2’ from any rigid pavement joint.”

  • Modeling: (by Tigerbrain)
slide23

σ - bottom of 18” thick

20’x20’ slab B-777

(254K edge loading).

slide24

σ - top of 18” thick

20’x20’ slab B-727

(corner loading).

slide25

Joint Issue Comments

  • Pavement Design is conservative (edge stress, no load transfer).
  • Modeling (with no load transfer between slabs, no bonding to underlying layer):
    • Dowels generally reduced max edge stress by ~ 20%.
    • With 2 dowels omitted, max edge stress reduced by ~ 12%.
slide26

(Joint Issue Comments continued)

  • Hence: Inside 2’, with 1 or 2 dowels omitted has minimal impact on slab-slab load transfer.
  • Load transfer between light base and pavement – assessment suggests non-issue.
  • Embedded steel can help control cracking close to joint.
  • Alternative: Boxout
slide27

PCC Joints

7”

Light base

18”

Light near PCC joint

slide28

Details, details !!

PCC Joint

Cracks

In-Pavement Light

Conduit Kerf

slide29

T/W CTL Light

Boxout at PCC joint

slide30

Normal joints

Crack

Doweled joint

for Boxout

Boxout at PCC joints !

slide32

A few

Related

concerns

slide33

KERFS

PCC Joint

Maintain existing pavement joints -

for full section of kerf !

slide34

Conduit below !!

Longitudinal crack

center T/W slab

T/W Centerline

Light

slide35

Faulty

sealing