astm e17 committee mini-seminar dec. 5, 2006 federal aviation administration 1 faa perspective...
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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
ASTM E17 Committee Mini-Seminar
Dec. 5, 2006
Federal AviationAdministration 2
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
ASTM E17 Committee Mini-Seminar
Dec. 5, 2006
Federal AviationAdministration 3
FAA Guidance - Pavement Profile
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
ASTM E17 Committee Mini-Seminar
Dec. 5, 2006
Federal AviationAdministration 4
FAA Guidance - Pavement Profile
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
.
ASTM E17 Committee Mini-Seminar
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FAA Guidance - Pavement Profile
Transverse Grade – Category C & D Airports
1.0 % to 1.5 %
Runway Width
1.0% to 1.5%
ASTM E17 Committee Mini-Seminar
Dec. 5, 2006
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FAA Guidance - Pavement Profile
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
ASTM E17 Committee Mini-Seminar
Dec. 5, 2006
Federal AviationAdministration 7
FAA Guidance - Pavement Profile
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
ASTM E17 Committee Mini-Seminar
Dec. 5, 2006
Federal AviationAdministration 8
FAA Guidance - Pavement Profile
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
ASTM E17 Committee Mini-Seminar
Dec. 5, 2006
Federal AviationAdministration 9
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
FAA Guidance - Pavement Profile
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
ASTM E17 Committee Mini-Seminar
Dec. 5, 2006
Federal AviationAdministration 10
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...
ASTM E17 Committee Mini-Seminar
Dec. 5, 2006
Federal AviationAdministration 11
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
ASTM E17 Committee Mini-Seminar
Dec. 5, 2006
Federal AviationAdministration 12
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
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Dec. 5, 2006
Federal AviationAdministration 13
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 ??