How is the distance between slope changes on a runway calculated for a code number 3 runway according to GM1 ADR-DSN.B.075?

D for a runway where the code number is 3 should be at least 15 000 (│x - y│ + │y - z│) m, where │x - y│ and │y - z│ are the absolute numerical values of the differences between consecutive slopes.

In the example given in GM1 ADR-DSN.B.075, what are the absolute numerical values of the slope differences when x = +0.01, y = -0.005, and z = +0.005?

│x - y│ = 0.015 and │y - z│ = 0.01.

What does the formula 15 000 (│x - y│ + │y - z│) m represent in the context of runway slope changes?

It represents the minimum distance D between slope changes for a runway with code number 3, where │x - y│ and │y - z│ are the absolute numerical values of the differences between consecutive slopes.

If the absolute values of slope differences are 0.015 and 0.01, what is the required minimum distance D for a code number 3 runway?

D should be not less than 15 000 × 0.025 = 375 m.

What is the purpose of the figure GM-B-2 referenced in GM1 ADR-DSN.B.075?

Figure GM-B-2 shows the profile on the centre line of a runway, illustrating how the distance between slope changes is determined.

In the example, what is the value of the sum of the absolute slope differences (│x - y│ + │y - z│)?

The sum is 0.015 + 0.01 = 0.025.

What is the minimum distance D for a code number 3 runway if the slope differences are 0.015 and 0.01?

D should be not less than 375 m.

GM1 ADR-DSN.B.075 Distance between slope changes on runways

Q: For a code number 3 runway, what is the minimum distance D between slope changes if the slopes are x = +0.01, y = -0.005, and z = +0.005?

D should be not less than 15 000 (0.015 + 0.01) m, that is, 15 000 × 0.025 = 375 m.

Q: What should be done when a runway is planned that combines the extreme values for slopes and changes in slope permitted by CS ADR-DSN.B.060 to CS ADR-DSN.B.080?

A study should be made to ensure that the resulting surface profile should not hamper the operation of aeroplanes.

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GM1 ADR-DSN.B.075 Distance between slope changes on runways

ED Decision 2014/013/R

The following example illustrates how the distance between slope changes is to be determined (see Figure GM-B-2):

D for a runway where the code number is 3 should be at least:

15 000 (│x – y│ + │y – z│) m

│x – y│ being the absolute numerical value of x – y

│y – z│ being the absolute numerical value of y – z

Assuming x = +0.01

y = –0.005

z = +0.005

then │x – y│ = 0.015

then │y – z│ = 0.01

To comply with the specifications, D should be not less than:

15 000 (0.015 + 0.01) m,

that is, 15 000 × 0.025 = 375 m

When a runway is planned that should combine the extreme values for the slopes and changes in slope permitted, as prescribed in CS ADR-DSN.B.060 to CS ADR-DSN.B.080, a study should be made to ensure that the resulting surface profile should not hamper the operation of aeroplanes.

Figure GM-B-2. Profile on centre line of runway

Details

Source-Title: GM1 ADR-DSN.B.075 Distance between slope changes on runways View latest amendments

Erulesid: ERULES-1963177438-2360 Compare versions

Domain: Aerodromes

Activitytype: Aerodrome operations, Aerodrome design, Manufacturing

Amendedby: CS Issue 1

Applicabilitydate: 7 March, 2014

Entryintoforcedate: 6 March, 2014

Icaoreference: Annex 14, Volume I

Regulatedentity: Aerodrome operator, Aerodrome design organisation, Aerodrome equipment manufacturer

Regulatorysource: ED Decision 2014/013/R Navigate

Regulatorysubject: CS-ADR-DSN

Technicalsubjectmatter: Runways

Typeofcontent: GM to CS (Guidance material to certification specification)

Parentir: CS ADR-DSN.B.075 Distance between slope changes on runways

Easacategory: Non-instrument runway, Non-precision approach runway, Precision approach runway Category I, Precision approach runway Category II, Precision approach runway Category III, Take-off runway

Origin: EASA

Category: EAR