UFC 3-260-03
15 Apr 01
b. Collect necessary data.
c.
Determine allowable load for each feature based on using aircraft and day-to-day traffic.
d. Determine PCN values for each feature.
e. Assign overall PCN value for the airfield based on critical aircraft.
f.
Recommend maintenance alternatives.
g. Where needed, calculate overlay thickness for planning purposes.
12. SUMMARY OF AIR FORCE EVALUATION REQUIREMENTS. The required elements of an
Air Force evaluation are as follows:
a. Conduct a general survey of the airfield pavements and assign a qualitative rating to each
feature.
b. Collect necessary data.
c.
Determine allowable load for each feature based upon aircraft groups and standard pass levels.
d. Determine PCN values for each feature based upon 50,000 passes of the C-17 aircraft.
e. Assign an overall PCN value to the airfield based on the C-17 aircraft and the weakest primary
runway feature.
13. SUMMARY OF NAVY AND MARINE CORPS EVALUATION REQUIREMENTS. The required ele-
ments of a Navy and Marine Corps evaluation are as follows:
a. Conduct a condition survey of the airfield pavement and assign a PCI rating to each feature.
Alternatively obtain most recent PCI survey from the corresponding Navy Engineering Field Division.
b. Collect construction history data, previous core and boring data.
c.
Conduct NDT of each feature using a FWD.
d. Determine actual traffic using the airfield and projected traffic for the next 10 years.
e. Determine tentative PCNs for each feature (one for each aircraft category present at the airfield).
f.
Determine the structural condition color map.
g. Determine the design critical aircraft and required overlays.
h. Determine the FLIP PCN for each runway feature.
i.
For each runway, the FLIP PCN is the lowest of the FLIP PCNs for each feature of that runway.
14. FROST-CONDITION EVALUATION. If the existing soil, water, and temperature conditions are con-
ducive to detrimental frost effects in the base, subbase, or subgrade materials, then during a portion of the
year the supporting capacity of a pavement will be less than if the same conditions of soil and water
existed in a nonfreezing environment. Where such conditions exist, the rigid pavement evaluation will be
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