Chapter 4 Pathways and Spaces Flashcards
Route Design Considerations
- Safety of Life
- Location
- Topography
- Local Restrictions (Climate)
- Cost
- Existing Infrastructure
- Future Development (site remediation)
OSP Preliminary Investigations to Consider
- Traffic
- Building Construction
- Road Improvements
- Landscaping
- Safety
- Work Site Access
- Future Maintenance
- Utilities
- Underground Streams
- Surface Restoration
- Soil Conditions
OSP Site Survey
- Inspect the cable route
- ROW and owner of pathway
- Pathway capacity
- Capcity of existing copper and fiber
- safety
- AHJ and pole owners
- Restoration Issues
Utility Color Code (Location marks)
White - Proposed Utility
Pink - Temp Survey Marks
Red - Electric
Yellow - Gas Oil Steam Petroleum
Orange - Communications
Blue - Potable Water
Purple - Reclaimed Water, Irrigation
Green - Sewer and Drain lines
Pathway Considerations
- Safety
- Alternative Routes
- Flagging painting pathway
- White Lining
- Test holes (potholes)
- Documentation
- Right-Of-Way
- Joint Use Occupancy
- Underground
- Direct Bury
- Aerial
Underground
Out-of-site services
Future use without disturbances
Physical cable protection
High initial costs
Require more detailed route planning
Provides a pathway for water, gases, and rodents into the building
Direct Buried
Out-of-site services
low initial installation cost compared to the Underground
easily bypasses obstructions
Not flexible for future growth
Not much protection
Difficult to locate
Provides a pathway for water, gases, and rodents into the building
Aerial
Low installation cost
easily accessible for maintenance
Aesthetically displeasing
Susceptible to environmental damage
Susceptible to damage from public
Higher cost of ongoing maintenance
Name the 3 standard conduit systems
Main
Branch
Subsidiary
Types of Conduit Material
PVC
PVCu
HDPE
Steel
Types of Inner-duct
HDPE
Fabric Mesh
PVC
3 methods of Trenching
Hand Dig
Back Hoe
Trencher
Trenching Methods
Vibratory Plow
Static Plow
Rip Plow
3 Main types of Bores
Auger (Jack and Bore)
HDD (Horizontal Directional Bore)
Missile Bore (Impact Moling)
Excavation Evacuation
Hydro vac
Air Blade (nozzle)
Hydro flushing
3 Types of Pole Loading
Transverse
Vertical
bending
NESC Storm Loading
Light
Medium
Heavy
There are nine classifications of poles used in the USA, name one
Pole Class 7 5338N or 1200lbs
Space between pole attachments
18”
Pole Setting conditions
Frozen Soil
Swampy soil
Sloping Ground
River or Stream
Pole Footings
Plank
Centenary Midspan
Plank Bracing
Pole Anchors
Cone
Expansion
Plate
Screw
Concrete
Plank
Pole to pole
Stub
Swamp
Permafrost
Cable Oscillating dampers
Spring Loaded Weight
Wind Dampers
Spiral Vibration
OSP underground spaces
Building
Under Building
Maintenance Holes
Hand Holes
Pedestals and Cabinets
Controlled Environment (CEV)
Concrete Universal Enclosures (CUE)
Confined Space Venting
Maintenance Holes entry’s
Center Conduit entry
Splayed Conduit entry
Types of Maintenance Holes
A -Both end walls
J-3 -Both end walls and one side wall
J-4 -Both end walls and both side walls (most flexible configuration)
L -One end one side
T -One end both sides
Double Wide -Both ends splayed with center racking
Controlled Environment Vault (CEV)
Below Ground enclosure that houses cables, hardware, and electronics
Controlled Universal Enclosure (CUE)
Above ground, walk-in enclosure that houses cables, hardware, and electronics
