3. UFC Guidance Temp Displaced Threshold Markings.pdf

UFC 3-260-04

16 May 2018 thresholds, existing markings need not be obliterated. However, Notice to Airmen (NOTAM), Flight Crew Information File (FCIF) memorandum, and any other available methods are used to convey the temporary changes and potential hazards that exist during the construction or maintenance period. See UFC 3-260-01, Appendix B, Section 1, for construction waiver requirements, and Appendix B, Section 14, for a construction phasing plan and safety checklist to be used for such projects.

5-2.14.1.1 Permanently Displaced Threshold Where Displacement Area is Used for Take-Off and/or Landing Ground Roll-Out.

Relocate the longitudinal threshold bars beginning 20 feet (6.1 meters) from the new threshold and place a retro-reflective white transverse stripe to precede them, with the outboard edges on the full-strength runway pavement, or to abut the runway side stripes. Reduce the width and length of the centerline stripes in the displaced threshold area and modify them with retro-reflective white arrowheads leading to the new threshold. Mark retro-reflective white chevrons to point toward the transverse threshold bar at evenly spaced increments across the pavement. Dimensions and layout details are shown in Figure 5-8.

5-2.14.1.2 Permanently Displaced Threshold Where Displacement Area is Used as a Taxiway (Referred to as Relocated Threshold in the Airman’s Information Manual [AIM]).

Relocate the longitudinal threshold bars beginning 20 feet (6.1 meters) from the new threshold and place a retro-reflective white transverse threshold bar to precede them, with the outboard edge at the beginning of the runway pavement available for landing.

Mark retro-reflective yellow chevrons to point toward the transverse threshold bar at evenly spaced increments across the pavement. Dimensions and layout details are shown in Figure 5-9.

5-2.14.1.3 Permanently Displaced Threshold Where Displacement Area Used as Taxiway and Take-Off and/or Landing Ground Roll.

Relocate the longitudinal threshold bars beginning 20 feet (6.1 meters) from the new threshold and place a retro-reflective white transverse threshold bar to precede them, with the outboard edge at the beginning of the runway pavement. Mark retro-reflective white chevrons to point toward the transverse threshold bar at evenly spaced increments across the pavement. Modify runway centerline stripes in the displacement area used for takeoff with retro-reflective white arrowheads. Mark a retroreflective yellow demarcation bar across the full width of the pavement at the end of the aligned taxiway, delineating the point where the takeoff roll begins. Dimensions and layout details are shown in Figure 5-10.

5-2.14.1.4 Temporarily Displaced Thresholds.

For temporarily displaced thresholds, place a retroreflective white transverse stripe that extends from side stripe to side stripe (or edge to edge of pavement if side stripes are not used) at the new threshold. Modify the centerlines within the displacement with arrowheads and mark chevrons across the runway width pointing to the transverse bar.

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Use retroreflective white for arrowheads and chevrons if the area is used for takeoff or roll-out, or retroreflective yellow if the area is planned only for taxiing operations. It is not necessary to reposition the standard threshold markings, modify the width and length of centerline stripes, or obliterate other existing markings within the displaced area;

however, NOTAM, FCIF memorandum, and any other available methods are used to convey the temporary changes and potential hazards to pilots. Dimensions and layout details are shown in Figure 5-11.

Figure 5-8 Permanently Displaced Threshold Where Preceding Pavement is Used as Runway (Take-Off or Landing)

20' [6.1M] 75' [23M]

HOLD LINE DISTANCE VARIES

PLACE TO PROTECT

APPROACH-DEPARTURE CLEARANCE

SURFACE OR POFZ

THRESHOLD BARS

TAXIWAY

CENTERLINE

5' [1.5M]

100' [30.5M]

ARROW

SHAFT

80' [24.4M]

3' [0.9M]

3' [0.9M]

NOTES:

1. RUNWAY THRESHOLD IS AT OUTBOARD

EDGE OF TRANSVERSE THRESHOLD BAR.

2. RUNWAY MARKINGS ARE REFLECTIVE

WHITE.

3. CHEVRONS ARE SPACED EQUALLY,

GROUPED AND CENTERED ON THE RUNWAY

CENTERLINE.

4. MARK ONLY THREE CHEVRONS ON

RUNWAYS LESS THAN 100' [30.5M] WIDE,

AND ONLY TWO ON RUNWAYS 60' [18.3M]

WIDE OR LESS.

45' [13.7M]

19°

15' [4.6M]

5' [1.5M]

1.5' [0.5M]

PREVIOUS THRESHOLD

(DEMARCATION BAR

OFF END OF RUNWAY)

120' [36.6M]

80' [24.4M]

200' [61M]

5' [1.5M]

TRANSVERSE

THRESHOLD BAR

ARROW

HEAD

CHEVRONS

SEE NOTES

45°

25' [7.6M]

50' [15.2M]

BEGINNING OF RUNWAY FOR

LANDING (DISPLACED THRESHOLD)

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Figure 5-11. Temporarily Displaced Threshold

GENERAL NOTES:

1. OTHER EXISTING RUNWAY MARKINGS

WITHIN THE TEMPORARILY

DISPLACED THRESHOLD AREA NEED

NOT BE OBLITERATED.

2. CENTERLINE STRIPES ARE MODIFIED

ONLY TO ADD ARROWHEADS (LENGTH

AND WIDTH REMAIN UNCHANGED).

3. ARROWHEADS AND CHEVRONS ARE

RETROREFLECTIVE WHITEWHERE

PAVEMENT PRECEDING THRESHOLD

IS USED FOR TAKEOFF OR ROLL-OUT

WHEN LANDING FROM THE OPPOSITE

DIRECTION.

4. ARROWHEADS AND CHEVRONS ARE

RETROREFLECTIVE YELLOW WHERE

PAVEMENT PRECEDING THE

DISPLACED THRESHOLD IS USED FOR

TAXIING ONLY.

SEE FIGURE 5-8 OR 5-9 FOR

LAYOUT OF DISPLACED

THRESHOLD BAR CHEVRONS

AND CENTERLINE ARROWHEADS

OMIT ARROWHEADS FOR

CENTERLINE STRIPES THAT

WILL CONFLICT WITH OTHER

MARKINGS (SEE NOTE 1)

TEMPORARILY DISPLACED

THRESHOLD BEGINS AT

OUTBOARD EDGE OF

TRANSVERSE STRIPE

STANDARD THRESHOLD

MARKINGS FOR A 150' [45.7M]

WIDE RUNWAY.

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