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Section 10: Bar Details

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Typical Bar Sizes for Abutments

The information in this section shows typical abutment reinforcing and its placement. The rebar weights, bends, and locations may be different from those given due to structural design requirements.

Abutment reinforcing default sizes are as follows:

Anchor: #i1002627Table 3-2: Typical Bar Sizes

Bars

Typical Size

Bars A

#11

Bars D

1 1/4" diameter (1'-8" normal length)

Bars H

#5

Bars L

#6

Bars S

#4

Bars U

#6

Bars V

#5

Bars wH

#6

Bars wP

#6

Bars wS

#4

Bars wU

#4

Bars wV

#5


Details need not be shown for straight bars unless the bars are lap spliced and the location of the lap is significant.

The maximum length of a rebar, without the requirement for a bar lap, is 60 feet.

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Bars A Details

“Bars A” is the normal designation for the main cap reinforcing. Bars A fit within the cap stirrups (bars S) and shall end as shown below. If a splice is required, the lap shall be placed at a convenient quarter point between foundations and dimensioned adequately. The lap required for reinforcing placed in the top of the cap shall be used for all bars A splices.

Bars A Details. (click in image to see full-size image) Anchor: #i1000778

Figure 3-17. Bars A Details.

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Bars H Details

“Bars H” is the normal designation for the horizontal backwall reinforcing. Bars H fit within the backwall vertical reinforcing (bars V) as shown below. If a splice is required, the lap may be placed at any convenient location. It will not be necessary to detail the lap for bars H. The equal spaces between the H bars detailed 8" from the top of backwall and the top A bar shall not exceed 1'-6".

Bars H Details. (click in image to see full-size image) Anchor: #i1000784

Figure 3-18. Bars H Details.

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Bars L Details

“Bars L” is the normal designation for the main corner reinforcing. Note that although only the backwall section is shown below, bars L are also required in the cap when founded wingwalls are used. In this condition, the cap bars L shall be identical to those used in the backwall.

Bars L Details. . (click in image to see full-size image) Anchor: #i1000790

Figure 3-19. Bars L Details. .

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Bars S Details

“Bars S” is the normal designation for the main cap stirrup reinforcing. Bars S fit around the foundations as shown below.

Bars S Details. . (click in image to see full-size image) Anchor: #i1000796

Figure 3-20. Bars S Details. .

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Bars U Details without Breakback

“Bars U” is the normal designation for the main cap end reinforcing. Bars U fit within the cap stirrups (bars S).

U Details without Breakback. (click in image to see full-size image) Anchor: #i1000802

Figure 3-21. U Details without Breakback.

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Bars U Details with Breakback

Bars U Details with Breakback. (click in image to see full-size image) Anchor: #i1000808

Figure 3-22. Bars U Details with Breakback.

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Bars V Details

“Bars V” is the normal designation for the vertical backwall reinforcing. Bars V fit around the backwall horizontal reinforcing (bars H).

Bars V Details. . (click in image to see full-size image) Anchor: #i1000814

Figure 3-23. Bars V Details. .

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Bars wH Details

“Bars wH” is the normal designation for the horizontal wingwall reinforcing. In cantilevered wings, bars wH are placed outside the wingwall vertical reinforcing (bars wV), while in founded wings, bars wH are placed to the inside of the vertical reinforcing (bars wV) and to the inside of the wing cap stirrups (bars wS). Bars wH will normally rest on or under bars H and A, in the abutment backwall and cap, so that bar wH spacing is established by their positions.

Bars wH Details. (click in image to see full-size image) Anchor: #i1000820

Figure 3-24. Bars wH Details.

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Bars wP Details

“Bars wP” is the normal designation for the cantilevered wingwall sloped bottom reinforcing. Bars wP fit outside the vertical wingwall reinforcing (bars wV) as shown below.

Bars wP Details. (click in image to see full-size image) Anchor: #i1000826

Figure 3-25. Bars wP Details.

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Bars wS Details

“Bars wS” is the normal designation for the founded wingwall cap stirrups. If required, adjust bars wS spacing as required to clear embedded piling.

Bars wS Details. (click in image to see full-size image) Anchor: #i1000832

Figure 3-26. Bars wS Details.

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Bars wU Details

“Bars wU” is the normal designation for the tie bars that hold cantilevered wingwall reinforcing mats in position. Bars wU fit outside the vertical wingwall reinforcing (bars wV) as shown below.

Bars wU Details. (click in image to see full-size image) Anchor: #i1000838

Figure 3-27. Bars wU Details.

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Bars wV Details

“Bars wV” is the normal designation for the vertical wingwall reinforcing. In cantilevered wings, bars wV are placed inside of the wingwall horizontal reinforcing (bars wH), while in founded wings, bars wV are placed outside the horizontal reinforcing (bars wH).

Bars wV Details. (click in image to see full-size image) Anchor: #i1000844

Figure 3-28. Bars wV Details.

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