Parkways and park roads | ||
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STRUCTURES
MAJOR STRUCTURES:
Bridges: |
Tunnels: |
MINOR STRUCTURES:
Drainage: |
Other: |
MISCELLANEOUS STRUCTURES:
Dams | Weigh stations | Emergency access |
Breakwaters | Overhead signs | Lighting systems |
Truck escape ramps | Cattle guards | Guardrails |
Entrance gates | Maintenance access |
DESIGN FACTORS:
Resistance to temperature changes, earthquake, bouyancy, earth
pressure, erosion from chemicals or stream sediments, ice loadLive loads - weight and dynamics of vehicles including impact
Dead loads - weight of structure itself
Wind loads - may include flooding, ice, currents
Standard specifications for vertical and horizontal clearances
Special uses: heavy vehicles, railroads, saddle stock, construction
equipment
a.
b.
c.
d.
BRIDGE TYPES:
Deck slab | spans up to 60 ft. | Note: Timber may be used for spans up to 20 feet. |
Girder | spans up to 150 ft. | |
Truss | spans up to 300 ft. | |
Arch | spans up to 300+ ft. | |
Suspension | spans up to 1000+ ft. |
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Parkways and park roads | ||