astm e17 committee mini-seminar dec. 5, 2006 federal aviation administration 1 faa perspective...

ASTM E17 Committee Mini-Seminar

Dec. 5, 2006

Federal AviationAdministration 1

FAA PERSPECTIVE Airfield Pavement Roughness

Presentation to: ASTM E17 Committee Mini-Seminar

Name: Rodney Joel - Airport Engineering Division

Date: Dec. 5, 2006

Federal AviationAdministration


Dec. 5, 2006


FAA Guidance - Pavement Profile

NEW CONSTRUCTION

AC 150/5300-13, Airport Design• Surface Gradient

• Maximum grade allowance

• Change in grade provisions

AC 150/5370-10B, Standards for Specifying Construction of Airports

• Construction Tolerances

• Acceptance Criteria


Dec. 5, 2006



AC 150/5300-13, Airport DesignCategory C & D airports

+1.5 percent - Max longitudinal grade (+0.8 percent in first and last quarter of runway)

+1.5 percent - Max grade change

Parabolic vertical curves 1,000 ft each 1 percent change

1,000 ft - Min distance between points of intersection

Relaxed for category A & B airports


Dec. 5, 2006



Longitudinal Grade – Category C & D Airports

0% to 0.8%

End ¼ Runway

0% to 1.5%

Vert.CurveLength

Vert.CurveLength

Grade Change

Distance Between Grade Change

Minimum (1000 ft) x (sum of grade change)

Minimum length – 1000 ft x grade change

0% to 1.5%

P.C

.

P.T

.


Dec. 5, 2006



Transverse Grade – Category C & D Airports

1.0 % to 1.5 %

Runway Width

1.0% to 1.5%


Dec. 5, 2006



AC 5370-10B, Item P-401 Plant Mix Bituminous Pavements

Grade – not exceed ½ inch at any point

Smoothness Finished Surface < ¼ inch in 16 feet

Reject if more than 15% exceed criteria

Optional Profilograph


Dec. 5, 2006



AC 5370-10B, Item P-501 Portland Cement Concrete Pavement

Grade not exceed 0.4 inch (12mm) at any point

Smoothness Finished Surface < ¼ inch in 16 feet

Reject if more than 15% exceed criteria

Optional Profilograph


Dec. 5, 2006



When tolerances are within the quality limits specified,experience has shown that the current FAA grade and straightedge criteria provides pavements that are safe for aircraft operations with regards to accelerated gear load, fatigue damage, pitch & roll, and cockpit g-forces.

This criteria may not address isolated exceptions such as harmonic oscillations


Dec. 5, 2006


FAA New Construction

(6mm per 5 m)

ICAO Tolerable Limit(30mm per 45 m)

ICAO Slope Change Limit(1.5% between consecutive slopes)

Acceptable

Unacceptable

Excessive

ICAO Standard of Construction

(3mm per 3 m)

Bump Length, meters

Bu

mp

He

igh

t, c

m


BOEING BUMP(appears to address gear load

issues for a single event)

Meeting the FAA design and

construction criteria (0.25”

per 16’) or the ICAO (3mm

per 3 m) criteria produces

pavements which are safe for

aircraft operations


Dec. 5, 2006


Pavement Roughness

EVALUATION OF EXISTING PAVEMENTSThere are several tools and methods to measure and evaluate a pavement profile.

Parameters under consideration include:• Boeing Bump

• CG or Gear Acceleration (aircraft response)

• IRI

• Bandpass Filters

• Power Spectral Density

• ETC...


Dec. 5, 2006


Pavement Roughness

EVALUATION OF EXISTING PAVEMENTS

• There is no industry standard which clearly defines when an airport pavement has become “too rough”

• Problems can be aircraft specific

• New Construction criteria is not applied

• Action is initiated by pilot complaints


Dec. 5, 2006


Percentile Distribution of 14 Runways, 254 Profile Runs

0%

20%

40%

60%

80%

100%

0.00 0.25 0.50 0.75 1.00

Estimated Grade/StraightedgeTolerances, inches

Pe

rce

nti

le D

istr

ibu

tio

n

Grade

Straightedge

0.50 inch at 60%

0.25 inch at 98%

Index Boeing Bump IRI CAPI

Min 0.12 1.01 3.7

Max 0.96 2.69 34.1

Pavement Roughness – Existing Facilities


Dec. 5, 2006


Pavement Roughness – What Next?

FAA Tech Center – Airport Pavement Roughness Criteria“develop practical procedures for measuring and characterizing the

roughness of runways and taxiways”

Simulator Study

Dr. Hayhoe will discuss

Industry Efforts ??

astm e17 committee mini-seminar dec. 5, 2006 federal aviation administration 1 faa perspective...

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