FLOOD09724

• County: Statewide
• Basin: Statewide
• Title: Culvert Inspection Manual Supplement to the Bridge Inspectors Training Manual
• Date: 5/1/1986
• Prepared For: Federal Highway Administration
• Prepared By: Office of Engineering
• Floodplain - Doc Type: Educational/Technical/Reference Information

Exhibit 14. Timber culvert. Timber culverts are
generally box culverts............................ 25

Exhibit 15. Roadway overtopping due to culverts with
inadequate capacity may result in
extensive damage to the roadway and the

embankment. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 26

Exhibit 16. A drainage area is defined by drainage
divides or lines that connect the high
points or follow the ridge lines around
the area served by the culvert.................... 27

Exhibit 17. Factors affecting culvert discharge............... 2B

Exhibit lB. AASHTO live load spacing for highway
structures. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 30

Exhibit 19. Surface contact area for single dual
whee 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 31

Exhibit 20. Oistribution of live load (single dual
wheel) for depth of cover H....................... 31

Exhibit 21. Deflection of flexible culverts...... ............. 32

Exhibit 22. Formula for ring compression......... ............. 33

Exhibit 23. Concrete thrust beams may be used as
longitudinal stiffeners........................... 34

Exhibit 24. Zones of tension and compression in rigid
pipes develop to resist vertical loads............ 35

Exhibit 25. Trench installation. Friction on trench
sides reduces the size of the column of
fill carried by the pipe....................... ... 35

Exhibit 26. Camber allows for settlement of a culvert
under a high fi 11. . . ... ... . .. ... ... .. .. . . ... ... . .. 37

Exhibit 27. Severe corrosion of corrugated steel
culvert due to aggressive water................... 38

Exhibit 2B. Corrugated steel culvert with invert

perforations...................................... 39

Exhibit 29. Reinforcing steel in concrete may corrode
when exposed to water due to spalling or

cracking................... ....................... 40

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