Anchor: #CIHIHCEF

Section 4: Normal Parameters and Calculations

Anchor: #i1003178

Cap and Backwall Parameters and Calculations

Normal abutment cap and backwall parameters are as follows:

  • Maximum skew angle not requiring corner breakback is 15°.
  • See Section 7 - Main Section Details for completed abutment sections.
  • See Section 10 - Bar Details for all reinforcing bar locations and spacing.

Cap and Backwall Parameters. (click in image to see full-size image) Anchor: #i999883

Figure 3-2. Cap and Backwall Parameters.

Online users can click 3-2 to view this illustration in PDF.

Typical Section Showing Height of Backwall. Online users can click 3-3 to view this illustration in PDF. (click in image to see full-size image) Anchor: #i999885

Figure 3-3. Typical Section Showing Height of Backwall. Online users can click 3-3 to view this illustration in PDF.

Online users can click 3-3 to view this illustration in PDF.

Typical Plan Views Showing Skew Offset Dimension Calculations. . (click in image to see full-size image) Anchor: #i999887

Figure 3-4. Typical Plan Views Showing Skew Offset Dimension Calculations. .

Online users can click 3-4 to view this illustration in PDF

Anchor: #i1003224

Wingwall Length Parameters and Calculations

Normal wingwall length parameters and calculations are as follows:

  • Maximum length of a typical cantilevered wingwall is 12'.
  • Minimum length of any wingwall is 4'.
  • Use rectangular wingwall for concrete girder, box beam, and double - T abutments.

Wingwall Length Parameters and Calculations. (click in image to see full-size image) Anchor: #i999893

Figure 3-5. Wingwall Length Parameters and Calculations.

Online users can click 3-5 to view this illustration in PDF.

Anchor: #i1003254

Foundation Parameters and Calculations

Typical 0° skew abutment foundation parameters are as follows:

  • 15'-0" - maximum spacing between main cap foundations, type A, B, and C beams*
  • 13'-0" - maximum spacing between main cap foundations, type IV beams*
  • 22'-0" - maximum length for a single foundation wingwall
  • 16'-0" - maximum spacing between foundations on a multi-foundation wingwall
  • Maximum end foundation spacing - See details below

*Round off spacing to nearest 3" where practical

NOTE: These are general guidelines used for developing standards. Unusual conditions may dictate that an engineering judgment be made.

Foundation Parameters and Calculations. (click in image to see full-size image) Anchor: #i999899

Figure 3-6. Foundation Parameters and Calculations.

Online users can click 3-6 to view this illustration in PDF.

Typical Plan Views with Calculations to Locate Foundations. (click in image to see full-size image) Anchor: #i999901

Figure 3-7. Typical Plan Views with Calculations to Locate Foundations.

Online users can click 3-7 to view this illustration in PDF.

Previous page  Next page   Title page