Bridge: Horizontal and Vertical Alignment - Revision history

Beichhorst at 14:47, 16 May 2017

2017-05-16T14:47:04Z

Mnemphos at 15:40, 25 November 2016

2016-11-25T15:40:52Z

Mnemphos at 16:18, 10 November 2016

2016-11-10T16:18:56Z

Mnemphos: /* Curved Horizontal Alignments */

2016-11-10T16:18:18Z

‎Curved Horizontal Alignments

Mnemphos at 16:15, 10 November 2016

2016-11-10T16:15:53Z

Mnemphos at 16:14, 10 November 2016

2016-11-10T16:14:34Z

Mnemphos at 14:47, 10 November 2016

2016-11-10T14:47:45Z

Mnemphos at 14:55, 9 November 2016

2016-11-09T14:55:56Z

Mnemphos: /* See Also */

2016-11-09T14:55:43Z

‎See Also

Mnemphos at 14:15, 2 November 2016

2016-11-02T14:15:16Z

← Older revision		Revision as of 14:47, 16 May 2017
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	=Discussion=		=Discussion=
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	==Curved Horizontal Alignments==		==Curved Horizontal Alignments==

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 =See Also=
 *[[Roadways:_Vertical_Alignment|Roadways: Vertical Alignment]]
 *[[Practical Design Implementation Guidance|Practical Design Implementation Guidance]]

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 ==Curved Horizontal Alignments==
-If possible, avoid locating bridges on curved horizontal alignments, since curved structures are more expensive to fabricate and are more difficult to construct than straight structures.  If a bridge falls within a curved roadway [[File:Curved_Roadway_Alignment_Ordinate.jpg||420px|right|frame|A Straight Bridge on a Curved Roadway]] alignment, see if a tangent (straight) section can be introduced into the curve that encompasses the bridge limits.  If the curve radius is large enough, consider constructing the bridge with straight girders and deck and variable width shoulders.  To determine if this is feasible, determine the ordinate between the inside curve gutter line and the chord created by connecting the gutter line location at the bearing center line at each abutment.  If this value is less than 1 ft. 0 inches, the structure should be laid out with straight girders and deck.
+If possible, avoid locating bridges on curved horizontal alignments, since curved structures are more expensive to fabricate and are more difficult to construct than straight structures.  If a bridge falls within a curved roadway [[File:Curved_Roadway_Alignment_Ordinate.jpg||420px|right|A Straight Bridge on a Curved Roadway]] alignment, see if a tangent (straight) section can be introduced into the curve that encompasses the bridge limits.  If the curve radius is large enough, consider constructing the bridge with straight girders and deck and variable width shoulders.  To determine if this is feasible, determine the ordinate between the inside curve gutter line and the chord created by connecting the gutter line location at the bearing center line at each abutment.  If this value is less than 1 ft. 0 inches, the structure should be laid out with straight girders and deck.
 ==Cross Slopes==

@@ Line 19: / Line 19: @@
 ==Curved Horizontal Alignments==
-If possible, avoid locating bridges on curved horizontal alignments, since curved structures are more expensive to fabricate and are more difficult to construct than straight structures.  If a bridge falls within a curved roadway [[File:Curved_Roadway_Alignment_Ordinate.jpg||420px|right|An Example Curved Roadway]] alignment, see if a tangent (straight) section can be introduced into the curve that encompasses the bridge limits.  If the curve radius is large enough, consider constructing the bridge with straight girders and deck and variable width shoulders.  To determine if this is feasible, determine the ordinate between the inside curve gutter line and the chord created by connecting the gutter line location at the bearing center line at each abutment.  If this value is less than 1 ft. 0 inches, the structure should be laid out with straight girders and deck.
+If possible, avoid locating bridges on curved horizontal alignments, since curved structures are more expensive to fabricate and are more difficult to construct than straight structures.  If a bridge falls within a curved roadway [[File:Curved_Roadway_Alignment_Ordinate.jpg||420px|right|frame|A Straight Bridge on a Curved Roadway]] alignment, see if a tangent (straight) section can be introduced into the curve that encompasses the bridge limits.  If the curve radius is large enough, consider constructing the bridge with straight girders and deck and variable width shoulders.  To determine if this is feasible, determine the ordinate between the inside curve gutter line and the chord created by connecting the gutter line location at the bearing center line at each abutment.  If this value is less than 1 ft. 0 inches, the structure should be laid out with straight girders and deck.
 ==Cross Slopes==

@@ Line 19: / Line 19: @@
 ==Curved Horizontal Alignments==
-If possible, avoid locating bridges on curved horizontal alignments, since curved structures are more expensive to fabricate and are more difficult to construct than straight structures.  If a bridge falls within a curved roadway [[File:Curved_Roadway_Alignment_Ordinate.jpg|curved roadway|420px|right]] alignment, see if a tangent (straight) section can be introduced into the curve that encompasses the bridge limits.  If the curve radius is large enough, consider constructing the bridge with straight girders and deck and variable width shoulders.  To determine if this is feasible, determine the ordinate between the inside curve gutter line and the chord created by connecting the gutter line location at the bearing center line at each abutment.  If this value is less than 1 ft. 0 inches, the structure should be laid out with straight girders and deck.
+If possible, avoid locating bridges on curved horizontal alignments, since curved structures are more expensive to fabricate and are more difficult to construct than straight structures.  If a bridge falls within a curved roadway [[File:Curved_Roadway_Alignment_Ordinate.jpg||420px|right|An Example Curved Roadway]] alignment, see if a tangent (straight) section can be introduced into the curve that encompasses the bridge limits.  If the curve radius is large enough, consider constructing the bridge with straight girders and deck and variable width shoulders.  To determine if this is feasible, determine the ordinate between the inside curve gutter line and the chord created by connecting the gutter line location at the bearing center line at each abutment.  If this value is less than 1 ft. 0 inches, the structure should be laid out with straight girders and deck.
 ==Cross Slopes==

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 *Cross slopes should be constant across a bridge
 *Bridges should not be located in a sump (low point) in the roadway profile
-*See [[Roadways: Horizontal Alignment|Roadways: Horizontal Alignment]] and [[Roadways: Roadways:_Vertical_Alignment|Roadways: Vertical Alignments]]
+*See [[Roadways: Horizontal Alignment|Roadways: Horizontal Alignment]] and [[Roadways:_Vertical_Alignment|Roadways: Vertical Alignment]]
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