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Understand

OSP Map

Every part of aerial and underground plant, where it sits and how the pieces connect. Tap a part for what it is, what to inspect and which SOP step covers it.

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Legend

  • AE PlantSolid blue lines: strand and lashed cable
  • UG PlantDashed orange line
  • SplicingViolet diamond, "SC"
  • DropsDotted line
  • PowerThin solid red line
  • Existing UtilitiesDash-dot line with letter code
  • LocatesShort paint dashes
  • Buried DropDotted orange line
  • Bore PathPlanned: thin long dash. Actual: UG dash
  • SteelGuys, hardware and anchor rods
  • DimensionClearance or separation, per NESC / owner spec
  • KeynoteNumbered callout, listed below the map
  • HaloSelected or highlighted part

Existing Utilities

  • Water
  • Gas
  • Sewer
  • Electric
  • Communications

Locate Paint (APWA)

  • OrangeCommunications
  • RedElectric
  • YellowGas, oil, steam
  • BluePotable water
  • GreenSewer and drain
  • PurpleReclaimed water
  • PinkTemporary survey
  • WhiteProposed excavation
Route Profile (Schematic)Side-on cutaway of one route: a guyed pole line with strand, lashed fiber, slack and a closure, a riser into a handhole, a bore under a road and existing utilities, a pedestal and drops. Schematic, not to scale. Clearances, depths and separations follow NESC, state law and owner specifications.SCGSSW

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Route Profile. Schematic, not to scale. Clearances, depths and separations follow NESC, state law and owner specifications.
  1. Keynote 1Supply Space, Power at the Top of the Pole
  2. Keynote 2Communication Worker Safety Zone
  3. Keynote 3Communication Space: Existing Attacher above the New Strand
  4. Keynote 4Down Guy, Holding the Dead-Ended Strand
  5. Keynote 5Yellow Guy Guard
  6. Keynote 6Anchor Rod in Line with the Guy
  7. Keynote 7Messenger Strand, Sagged Pole to Pole
  8. Keynote 8Fiber Cable Lashed to the Strand
  9. Keynote 9Multiport Service Terminal
  10. Keynote 10Aerial Drop to the House
  11. Keynote 11Slack Loop in a Figure-8 on Snowshoes
  12. Keynote 12Aerial Splice Closure
  13. Keynote 13Riser: Aerial Becomes Underground
  14. Keynote 14Midspan Clearance over the Road
  15. Keynote 15Handhole with Slack Coil
  16. Keynote 16Tracer Wire and Test Point
  17. Keynote 17Directional Bore below the Road and Utilities
  18. Keynote 18Tolerance Zone Either Side of the Gas Line
  19. Keynote 19Pothole Exposing the Gas Line
  20. Keynote 20Locate Paint and Flags
  21. Keynote 21Pedestal
  22. Keynote 22Buried Drop to the House
  23. Keynote 23Restoration over the Trench
  24. Keynote 24Warning Tape above the Ducts
  25. Keynote 25Duct Bank in the Trench

Every Component

Pole and Structure

  • Utility PoleWood, steel or concrete pole that carries power at the top and communication attachments below it.Views: Profile · Plan · Pole
  • Pole Tag and BirthmarkThe owner’s number tag and the manufacturer’s birthmark showing class, height, treatment and year.Views: Pole
  • Communication Worker Safety ZoneRequired separation between supply facilities and communication attachments (NESC, owner spec).Views: Profile · Pole

Power and Grounding

  • Supply SpaceUpper section of the pole for power conductors and equipment; only qualified electrical workers work there.Views: Profile · Pole
  • Neutral and SecondaryGrounded power conductor, often near the bottom of the supply space; measure separation from the lowest supply facility.Views: Profile · Pole
  • Vertical Ground and BondingThe pole’s vertical ground wire; the strand is bonded to it per NESC and owner spec.Views: Pole

Aerial Plant

  • Communication SpacePole section below the safety zone for telecom attachments, spaced per the owner’s standard.Views: Profile · Pole
  • Messenger StrandGalvanized steel strand tensioned pole to pole that carries the lashed fiber cable.Views: Profile · Plan · Pole
  • Lashed Fiber CableFiber cable bound to the messenger strand with a spiral of lashing wire.Views: Profile · Plan · Pole
  • Expansion LoopCable loop formed at a pole to absorb movement, where the owner requires it.Views: Profile · Pole
  • Corner Pole and Bisect GuyAngle pole guyed on the bisector of the line angle.Views: Plan
  • SnowshoePair of curved strand brackets that store a slack loop without kinking the cable.Views: Profile · Plan · Pole
  • Aerial Slack LoopCable stored on the strand for future splicing, repair or relocation.Views: Profile · Plan
  • Terminal Tail CoilStored coil of the terminal’s tail cable, held in a bracket on the pole or strand.Views: Pole
  • Cable TagIdentification tag on the cable at each pole that names the owner and the cable.Views: Pole

Hardware and Guying

  • Through-BoltBolt through the pole at the engineered attachment height that carries the strand clamp.Views: Pole
  • Strand ClampSuspension clamp on the through-bolt that holds the messenger strand to the pole.Views: Pole
  • Extension Arm or StandoffBracket that holds the strand away from the pole face to gain clearance.Views: Pole
  • Lashing Wire ClampClamp that anchors the end of the lashing wire on the strand at each pole.Views: Pole
  • Strand Dead-EndTermination of the strand at a terminal pole, guyed against the pull.Views: Profile · Pole
  • Down GuySteel strand from the pole to an anchor that balances the line’s unbalanced tension.Views: Profile · Plan · Pole
  • Preformed Guy GripHelical dead-end that terminates the guy strand at the pole and at the anchor.Views: Pole
  • Guy GuardYellow marker on the lower guy where people or vehicles could walk or drive into it.Views: Profile · Pole
  • Guy Strain InsulatorInsulating link placed in a guy where the power owner or NESC requires one.Views: Pole
  • Anchor and Anchor RodScrew, expanding, plate or rock anchor set below grade in line with the guy load.Views: Profile · Plan · Pole
  • Span and Sidewalk GuysGuying used when an in-line down guy and anchor cannot be placed.Views: Plan

Aerial to Underground

  • RiserU-guard and conduit on the pole where cable moves between aerial and underground.Views: Profile · Plan · Pole

Underground Plant

  • HDPE ConduitContinuous plastic duct placed by boring, plowing or trenching to carry fiber underground.Views: Profile · Plan
  • Innerduct and MicroductSmaller ducts inside a conduit that create separate pathways or carry air-blown cable.Views: Handhole
  • Duct BankSeveral ducts placed together in one trench, sometimes encased in concrete.Views: Profile
  • Tracer Wire and Test PointLocatable wire placed with non-metallic duct where specified (owner spec) and tested for continuity at each enclosure.Views: Profile · Handhole
  • Warning TapeBuried marking tape placed above the duct in an open trench to warn future diggers.Views: Profile
  • HandholeBelow-grade box with a load-rated lid for cable access, slack storage and splicing.Views: Profile · Plan · Handhole
  • Handhole Lid MarkingLid marking that names the owner and use and shows the load rating.Views: Handhole
  • Vault or ManholeBelow-grade enclosure large enough to enter; confined-space rules apply.Views: Plan
  • PedestalAbove-grade enclosure that houses buried splices or drop terminals.Views: Profile · Plan
  • FlowerpotSmall grade-level enclosure for drop terminals and short slack.Views: Plan
  • Handhole Slack CoilCable stored in a coil inside a handhole or vault, within bend radius.Views: Handhole
  • Directional Bore PathPlanned and actual pilot-bore path between the entry and exit pits, passing under existing utilities.Views: Profile · Plan · Bore
  • Entry PitExcavation where the drill head enters the ground, with drilling fluid containment.Views: Bore
  • Exit PitExcavation where the drill head surfaces and the pullback string is assembled.Views: Bore
  • Drilling Fluid and RecoveryFluid that carries cuttings and holds the hole open; contained and disposed of per regulations.Views: Bore
  • PotholeVacuum or hand excavation that exposes an existing utility before the bore crosses it.Views: Profile · Plan · Bore
  • Micro-TrenchNarrow saw-cut trench in pavement for microduct, sealed after placement.Views: Plan

Equipment

  • HDD RigDirectional drill, anchored to the ground, with electrical strike protection.Views: Bore
  • Drill RodsRods added one at a time behind the drill head; each rod is a common reading interval unless the owner sets another.Views: Bore
  • Drill Head and SondeSlant-face bit carrying a transmitter that reports depth, pitch and roll to the locator.Views: Bore
  • Walkover LocatorReceiver carried over the bore head to read its position and depth and guide steering.Views: Bore
  • BackreamerTool pulled back through the pilot hole to enlarge it for the product.Views: Bore
  • SwivelRotating link that keeps the drill string’s rotation from twisting the conduit.Views: Bore
  • Breakaway LinkSacrificial link that breaks before the pull stretches any conduit past its safe pull strength.Views: Bore
  • Pulling Head or GripFitting that connects the pullback string to the conduit or conduit bundle.Views: Bore
  • Conduit Reel and TrailerReel on a trailer that pays out conduit in line with the bore during pullback.Views: Bore
  • Splicing WorkstationTrailer, van or tent that gives the splicer a clean, dry, lit workspace.Views: Profile
  • OTDR with Launch CableInstrument that maps loss and reflectance along a fiber; launch and receive cables reveal end connectors.Views: Handhole

Splicing

  • Aerial Splice ClosureSealed closure on the strand where fibers are spliced and stored.Views: Profile · Plan
  • Multiport Service TerminalHardened terminal with connectorized ports that customer drops plug into.Views: Profile · Plan · Pole
  • Underground Splice ClosureSealed splice closure mounted on a bracket in a handhole or vault, with slack to lift it out.Views: Handhole
  • Closure InteriorExpress basket, splice trays, strength-member clamps, grounding and seals inside a closure.Views: Handhole
  • Splice TrayTray that holds splice protection sleeves and routes fibers within bend radius.Views: Handhole
  • Buffer Tubes and Color CodeColor-coded tubes and fibers identified with the TIA-598 sequence.Views: Handhole
  • Fiber Distribution HubCabinet with splitters that links feeder fibers to distribution fibers.Views: Plan
  • Splitter ModulePassive optical splitter that divides one feeder fiber among several distribution fibers.Views: Plan

Drops

  • Aerial DropDrop cable from a terminal to the building, held with drop clamps at each end.Views: Profile · Plan
  • Buried DropDrop cable or duct from a pedestal or handhole to the building.Views: Profile · Plan

Locates

  • Locate MarksAPWA-colored paint and flags marking the approximate location of buried facilities.Views: Profile · Plan · Bore
  • White-LiningWhite paint dashes, like locate marks, down the centerline of the intended bore path so locators know what to mark.Views: Plan

Existing Utilities

  • Water MainExisting potable water line, marked in APWA blue; drawn with the letter code W.Views: Profile · Plan · Bore
  • Gas MainExisting gas line, marked in APWA yellow; on a strike, evacuate and call 911, then the utility, per your emergency plan.Views: Profile · Plan · Bore
  • Sewer Main and LateralSewer main and service laterals, marked in APWA green; laterals are often unmarked and a crossbore risk.Views: Profile · Plan · Bore
  • Underground PowerBuried electric line, marked in APWA red; an electrical strike risk for HDD.Views: Plan · Bore
  • Existing CommunicationsOther companies’ buried communication lines, marked in APWA orange.Views: Plan

Clearances and Site

  • Midspan ClearanceHeight of the cable’s lowest point over roads, drives and walks (NESC Table 232-1, owner spec).Views: Profile
  • Surface RestorationBackfill, compaction and surface repair to the permit and owner specification.Views: Profile
  • Tolerance ZoneBand either side of a locate mark where you dig only with the methods state law allows, typically hand tools or vacuum excavation.Views: Profile · Bore
  • Road CrossingWhere the route crosses a road: bored under it, or spanned over it with the required clearance.Views: Profile · Plan

Operations

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