Rigid Airport Pavement Design Design Aircraft and Annual - PDF document

Rigid Airport Pavement Design Design Aircraft and Annual Departures 1

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Conversions for Different Gear Types Conversions for Different Wheel Loads 4

Example Average Max Takeoff Aircraft Gear Type Annual Weight Departures (lbs.) 727-100 dual 3,760 160,000 727-200 dual 9,080 190,500 707-320B dual tandem 3,050 327,000 DC-9-30 dual 5,800 108,000 CV-880 dual tandem 400 184,500 737-200 dual 2,650 115,500 L-1011-100 dual tandem 1,710 450,000 747-100 double dual tandem 85 700,000 Determine Design Aircraft Average Max Takeoff Aircraft Gear Type Annual Weight Departures (lbs.) 727-100 dual 3,760 160,000 727-200 dual 9,080 190,500 707-320B dual tandem 3,050 327,000 DC-9-30 dual 5,800 108,000 CV-880 dual tandem 400 184,500 737-200 dual 2,650 115,500 L-1011-100 dual tandem 1,710 450,000 747-100 double dual tandem 85 700,000 Adjust Departures for Gear Type Average Gear Equivalent Aircraft Gear Type Annual Type Dual Wheel Departures Multiplier Departures 727-100 dual 3,760 1.0 3,760 727-200 dual 9,080 1.0 9,080 707-320B dual tandem 3,050 1.7 5,185 DC-9-30 dual 5,800 1.0 5,800 CV-880 dual tandem 400 1.7 680 737-200 dual 2,650 1.0 2,650 L-1011-100 dual tandem 1,710 1.7 2,907 747-100 double dual tandem 85 1.7 145 5

Determine Equivalent Dual Wheel Loads Max Takeoff Weight on Wheel Aircraft Gear Type Weight Main Gear Load (lbs.) (lbs) (lbs) 727-100 dual 160,000 152,000 38,000 727-200 dual 190,500 180,975 45,240 707-320B dual tandem 327,000 310,650 38,830 DC-9-30 dual 108,000 102,600 25,650 CV-880 dual tandem 184,500 175,275 21,910 737-200 dual 115,500 109,725 27,430 L-1011-100 dual tandem 450,000 285,000 35,625 747-100 double dual tandem 700,000 285,000 35,625 Adjust Departures for Wheel Loads Equivalent Wheel Load of Equivalent Annual Wheel Load Aircraft Dual Gear Design Aircraft Departures of (lbs) Departures (lbs.) Design Aircraft 727-100 3,760 38,000 45,240 1,891 727-200 9,080 45,240 45,240 9,080 707-320B 5,185 38,830 45,240 2,764 DC-9-30 5,800 25,650 45,240 682 CV-880 680 21,910 45,240 94 737-200 2,650 27,430 45,240 463 L-1011-100 2,907 35,625 45,240 1,184 747-100 145 35,625 45,240 83 TOTAL 16,241 Example (cont.) Assumed Material Properties k eff = 200 psi/in S c = 650 psi 6

Typical Pavement Sections 7

Acceptable Subbase Materials • Item P-154 ~ Subbase Course • Item P-208 ~ Aggregate Base Course • Item P-209 ~ Crushed Aggregate Base Course • Item P-211 ~ Lime Rock Base Course • Item P-304 ~ Cement Treated Base Course • Item P-306 ~ Econocrete Subbase Course • Item P-401 ~ Plant Mix Bituminous Concrete 8