The length of a runway under standard conditions is 1840 m. The airport site has an elevation of 250 m. Its reference temperature is 32°C. Assuming all the other conditions to be under standard level, determine the correction for elevation.

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BHEL Engineer Trainee Civil 24 Aug 2023 Official Paper

Answer 1

Concept:

According to ICAO, the basic runway length should be increased by 7% for every 300 m rise in elevation above mean sea level.

\(Correction = \frac{7}{100} \times \text{Runway Length} \times \frac{\text{Airport Elevation}}{300}\)

Given:

Runway length = 1840 m

Airport elevation = 250 m

Calculation:

\(Correction = \frac{7}{100} \times 1840 \times \frac{250}{300}\)

\(= 0.07 \times 1840 \times 0.8333 = 107.52 \, \text{m}\)