Category:503 Bridge Approach Slabs - Revision history

Smithk: updated links

2021-08-17T19:53:40Z

updated links

← Older revision		Revision as of 14:53, 17 August 2021
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	\|'''Bridge Approach Slabs, Performance and Design'''		\|'''Bridge Approach Slabs, Performance and Design'''
	\|-		\|-
	\|[~~http~~://~~library~~.modot.mo.gov/~~RDT~~/~~reports~~/~~Ri02033~~/RDT04010.pdf Report 2004]		\|[https://spexternal.modot.mo.gov/sites/cm/CORDT/RDT04010.pdf Report 2004]
	\|-		\|-
	\|[~~http~~://~~library~~.modot.mo.gov/~~RDT~~/~~reports~~/~~Ri02033~~/~~brief~~.pdf Summary 2004]		\|[https://spexternal.modot.mo.gov/sites/cm/CORDT/RDT04010_Brief.pdf Summary 2004]
	\|-		\|-
	\|'''Bridge Approach Slabs, Alternative and Cost Efficient Approaches'''		\|'''Bridge Approach Slabs, Alternative and Cost Efficient Approaches'''
	\|-		\|-
	\|[~~http~~://~~library~~.modot.mo.gov/~~RDT~~/~~reports~~/~~TRyy0915~~/or11009.pdf Report, 2010]		\|[https://spexternal.modot.mo.gov/sites/cm/CORDT/or11009.pdf Report, 2010]
	\|-		\|-
	\|'''See also:''' [https://www.modot.org/research-publications Research Publications]		\|'''See also:''' [https://www.modot.org/research-publications Research Publications]

Smithk: Per BR, clarified terminology

2021-06-28T18:28:31Z

Per BR, clarified terminology

Smithk at 20:08, 18 August 2020

2020-08-18T20:08:59Z

← Older revision		Revision as of 15:08, 18 August 2020
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	\|[http://library.modot.mo.gov/RDT/reports/TRyy0915/or11009.pdf Report, 2010]		\|[http://library.modot.mo.gov/RDT/reports/TRyy0915/or11009.pdf Report, 2010]
	\|-		\|-
	\|'''See also:''' [~~http~~://www.modot.~~gov~~/~~services/OR/byDate.htm Innovation Library~~]		\|'''See also:''' [https://www.modot.org/research-publications Research Publications]
	\|}		\|}

Smithk: /* Bridge Approach Slab (Minor Road) Sub-class Requirements */Per BR, updated guidance to reflect current practice concerning asphalt type. Asphalt designation for minor roads is now shown on roadway plans, no longer on bridge approach slab sheet for minor roads.

2020-08-07T19:34:20Z

Bridge Approach Slab (Minor Road) Sub-class Requirements: Per BR, updated guidance to reflect current practice concerning asphalt type. Asphalt designation for minor roads is now shown on roadway plans, no longer on bridge approach slab sheet for minor roads.

← Older revision		Revision as of 14:34, 7 August 2020
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	The concrete approach pavement shown on [https://www.modot.org/media/16837 Standard Plan 504.00] is not to be used with the Bridge Approach Slab (Minor Road).		The concrete approach pavement shown on [https://www.modot.org/media/16837 Standard Plan 504.00] is not to be used with the Bridge Approach Slab (Minor Road).

	===<center>Bridge Approach Slab (Minor Road) Sub-class Requirements===		====<center>Bridge Approach Slab (Minor Road) Sub-class Requirements====
	{\| border="1" class="wikitable" style="margin: 1em auto 1em auto" style="text-align:center"		{\| border="1" class="wikitable" style="margin: 1em auto 1em auto" style="text-align:center"
	\|+		\|+
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	</center>		</center>

	The Bridge Approach Slab (Minor Road) standard drawing will ~~note~~ the asphalt mix type required for the asphalt option. District Design is responsible for specifying the mix type, which will generally match the adjacent roadway design. The mix type ~~should~~ be noted on the Bridge Memorandum.		The Bridge Approach Slab (Minor Road) standard drawing will defer to the roadway plans for the asphalt mix type required for the asphalt option. District Design is responsible for specifying the mix type, which will generally match the adjacent roadway design. The mix type need not be noted on the Bridge Memorandum.

	<u>Guidance for Estimating Roadway Plans Quantities: </u/>		<u>Guidance for Estimating Roadway Plans Quantities: </u/>

Smithk: /* 503.6 Maintenance Activities */ updated link

2018-10-10T14:07:20Z

503.6 Maintenance Activities: updated link

← Older revision		Revision as of 09:07, 10 October 2018
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	===503.6 Maintenance Activities===		===503.6 Maintenance Activities===
	See [[771.1 ~~Mud Jacking~~ Bridge Approach\|~~Mud Jacking~~ Bridge Approach]] for additional information.		See [[771.1 Concrete Bridge Approach Slab Repair: Slab Stabilization (Jacking)\|EPG 771.1 Concrete Bridge Approach Slab Repair: Slab Stabilization (Jacking)]] for additional information.

Smithk at 14:20, 28 September 2018

2018-09-28T14:20:00Z

Smithk: Per BR, replaced bridge standard drawing tables with links to MoDOT’s website.

2016-09-22T12:52:05Z

Per BR, replaced bridge standard drawing tables with links to MoDOT’s website.

@@ Line 4: / Line 4: @@
 All new and replacement bridge construction shall include bridge approach slabs. Bridge redecking, rehabilitation and widening construction will generally not require repairing, replacing or adding new bridge approach slabs.
 {|style="padding: 0.3em; margin-left:15px; border:1px solid #a9a9a9; text-align:center; font-size: 95%; background:#ffddcc" width="210px" align="right"
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 |}
-Standard details of bridge approach slabs are retained in the Bridge Standard Drawings. The appropriate bridge approach slab will be included on the bridge plan sheets prepared by the Bridge Division. The cost for bridge approach slabs is included in the bridge cost estimate. The concrete approach pavement shown on [http://www.modot.mo.gov/business/standards_and_specs/documents/50400.pdf Standard Plan 504.00], which is the transition pavement between the bridge approach slab and the roadway pavement, is considered a roadway item and shall be included in the roadway cost estimate.
+Standard details of bridge approach slabs are retained in the Bridge Standard Drawings.
 There are two primary classes of bridge approach slabs that follow from MoDOT roadway classification: the Bridge Approach Slab (Major Road) and the Bridge Approach Slab (Minor Road). The Bridge Approach Slab (Major Road) is a reinforced concrete slab. The Bridge Approach Slab (Minor Road) is a contractor-option slab consisting of two subclasses of slabs: either an optional lesser reinforced concrete slab, or an optional asphalt slab.

Smithk: updated links

2016-06-09T14:27:23Z

updated links

← Older revision		Revision as of 09:27, 9 June 2016
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	A concrete bridge approach slab is not subject to the Quality Control/Quality Assurance (QC/QA) requirements of [http://www.modot.org/business/standards_and_specs/SpecbookEPG.pdf#page=8 Sec 502 of the Standard Specifications]. Concrete bridge approach slabs shall be cured and sealed in accordance with [http://www.modot.org/business/standards_and_specs/SpecbookEPG.pdf#page=11 Sec 703 of the Standard Specifications] for bridge decks.		A concrete bridge approach slab is not subject to the Quality Control/Quality Assurance (QC/QA) requirements of [http://www.modot.org/business/standards_and_specs/SpecbookEPG.pdf#page=8 Sec 502 of the Standard Specifications]. Concrete bridge approach slabs shall be cured and sealed in accordance with [http://www.modot.org/business/standards_and_specs/SpecbookEPG.pdf#page=11 Sec 703 of the Standard Specifications] for bridge decks.

	Requirements for approach slabs constructed with asphalt will be in accordance with the either [http://www.modot.~~mo.gov~~/business/standards_and_specs/~~Sec0401~~.pdf Sec 401] or [http://www.modot.~~mo.gov~~/business/standards_and_specs/~~Sec0403~~.pdf Sec 403], as determined by the mix type to be specified on the plans.		Requirements for approach slabs constructed with asphalt will be in accordance with the either [http://www.modot.org/business/standards_and_specs/SpecbookEPG.pdf#page=7 Sec 401] or [http://www.modot.org/business/standards_and_specs/SpecbookEPG.pdf#page=7 Sec 403], as determined by the mix type to be specified on the plans.

	When a Bridge Approach Slab (Minor Road) is constructed with asphalt, it is important to remember that the asphalt tonnage is included in the cost of the bridge approach slab pay item. If the asphalt approach slab is laid continuously with the adjacent roadway asphalt pavement, and the roadway asphalt pavement is paid per ton, the inspector will need to compute the quantity (tons) of asphalt that was needed to construct the 20 ft. approach slab and then deduct that amount from the total asphalt tonnage (i.e. ticket total) placed that day.		When a Bridge Approach Slab (Minor Road) is constructed with asphalt, it is important to remember that the asphalt tonnage is included in the cost of the bridge approach slab pay item. If the asphalt approach slab is laid continuously with the adjacent roadway asphalt pavement, and the roadway asphalt pavement is paid per ton, the inspector will need to compute the quantity (tons) of asphalt that was needed to construct the 20 ft. approach slab and then deduct that amount from the total asphalt tonnage (i.e. ticket total) placed that day.

Smithk: updated links

2016-06-09T14:09:18Z

updated links

← Older revision		Revision as of 09:09, 9 June 2016
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	Bridge end drainage provisions can include concrete spill slope protection, concrete slope aprons, drain basins, curbs, and sideslope drainage provisions which includes rock blanket or drain flumes, or a combination of these. (See [[748.7 Bridge Deck and Bridge End Drainage\|EPG 748.7 Bridge Deck and Bridge End Drainage]] and [http://www.modot.mo.gov/business/standards_and_specs/documents/60940.pdf Standard Plans 609.40] for details.)		Bridge end drainage provisions can include concrete spill slope protection, concrete slope aprons, drain basins, curbs, and sideslope drainage provisions which includes rock blanket or drain flumes, or a combination of these. (See [[748.7 Bridge Deck and Bridge End Drainage\|EPG 748.7 Bridge Deck and Bridge End Drainage]] and [http://www.modot.mo.gov/business/standards_and_specs/documents/60940.pdf Standard Plans 609.40] for details.)

	===503.5 Construction Inspection Guidance for [http://www.modot.~~mo.gov~~/business/standards_and_specs/~~Sec0503~~.pdf Sec 503]===		===503.5 Construction Inspection Guidance for [http://www.modot.org/business/standards_and_specs/SpecbookEPG.pdf#page=8 Sec 503]===

	'''Material and Construction Requirements.''' For material and construction requirements, refer to Sec 503 of the Standard Specifications.		'''Material and Construction Requirements.''' For material and construction requirements, refer to Sec 503 of the Standard Specifications.

	A concrete bridge approach slab is not subject to the Quality Control/Quality Assurance (QC/QA) requirements of [http://www.modot.~~mo.gov~~/business/standards_and_specs/~~Sec0502~~.pdf Sec 502 of the Standard Specifications]. Concrete bridge approach slabs shall be cured and sealed in accordance with [http://www.modot.~~mo.gov~~/business/standards_and_specs/~~Sec0703~~.pdf Sec 703 of the Standard Specifications] for bridge decks.		A concrete bridge approach slab is not subject to the Quality Control/Quality Assurance (QC/QA) requirements of [http://www.modot.org/business/standards_and_specs/SpecbookEPG.pdf#page=8 Sec 502 of the Standard Specifications]. Concrete bridge approach slabs shall be cured and sealed in accordance with [http://www.modot.org/business/standards_and_specs/SpecbookEPG.pdf#page=11 Sec 703 of the Standard Specifications] for bridge decks.

	Requirements for approach slabs constructed with asphalt will be in accordance with the either [http://www.modot.mo.gov/business/standards_and_specs/Sec0401.pdf Sec 401] or [http://www.modot.mo.gov/business/standards_and_specs/Sec0403.pdf Sec 403], as determined by the mix type to be specified on the plans.		Requirements for approach slabs constructed with asphalt will be in accordance with the either [http://www.modot.mo.gov/business/standards_and_specs/Sec0401.pdf Sec 401] or [http://www.modot.mo.gov/business/standards_and_specs/Sec0403.pdf Sec 403], as determined by the mix type to be specified on the plans.

Smithk: /* 503.3 Other than New and Replacement Bridges */ Per BR, minor correction

2016-05-17T12:24:26Z

503.3 Other than New and Replacement Bridges: Per BR, minor correction

← Older revision		Revision as of 07:24, 17 May 2016
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	===503.3 Other than New and Replacement Bridges===		===503.3 Other than New and Replacement Bridges===
	Bridge approach slabs can be repaired, replaced, and added new in situations determined by the project core team as that requiring a prescribed detailed level of construction. Also, other situations that can require a deeper investigative review by the project core team include using and repairing an existing approach where an bridge approach slab does not exist or a widening project where a bridge approach slab may or may not exist.		Bridge approach slabs can be repaired, replaced, and added new in situations determined by the project core team as that requiring a prescribed detailed level of construction. Also, other situations that can require a deeper investigative review by the project core team include using and repairing an existing approach where a bridge approach slab does not exist or a widening project where a bridge approach slab may or may not exist.

	Slab or pavement adjacent to an existing bridge end that is not specifically part of the original bridge plans shall be considered a roadway item for repairs, pay items and quantities.		Slab or pavement adjacent to an existing bridge end that is not specifically part of the original bridge plans shall be considered a roadway item for repairs, pay items and quantities.

← Older revision		Revision as of 13:28, 28 June 2021
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	The appropriate bridge approach slab will be included on the bridge plan sheets prepared by the Bridge Division. The cost for bridge approach slabs is included in the bridge cost estimate. The concrete approach pavement shown on [https://www.modot.org/media/16837 Standard Plan 504.00], which is the transition pavement between the bridge approach slab and the roadway pavement, is considered a roadway item and shall be included in the roadway cost estimate.		The appropriate bridge approach slab will be included on the bridge plan sheets prepared by the Bridge Division. The cost for bridge approach slabs is included in the bridge cost estimate. The concrete approach pavement shown on [https://www.modot.org/media/16837 Standard Plan 504.00], which is the transition pavement between the bridge approach slab and the roadway pavement, is considered a roadway item and shall be included in the roadway cost estimate.

	There are two primary classes of bridge approach slabs that follow from MoDOT roadway classification: the Bridge Approach Slab (Major ~~Road~~) and the Bridge Approach Slab (Minor ~~Road~~). The Bridge Approach Slab (Major ~~Road~~) is a reinforced concrete slab. The Bridge Approach Slab (Minor ~~Road~~) is a contractor-option slab consisting of two subclasses of slabs: either an optional lesser reinforced concrete slab, or an optional asphalt slab.		There are two primary classes of bridge approach slabs that follow from MoDOT roadway classification: the Bridge Approach Slab (Major) and the Bridge Approach Slab (Minor). The Bridge Approach Slab (Major) is a reinforced concrete slab. The Bridge Approach Slab (Minor) is a contractor-option slab consisting of two subclasses of slabs: either an optional lesser reinforced concrete slab, or an optional asphalt slab.

	===503.1 New and Replacement Bridges on Major ~~Roads~~===		===503.1 New and Replacement Bridges on Major Routes===
	A reinforced concrete Bridge Approach Slab (Major ~~Road~~), as well as the concrete approach pavement shown on [https://www.modot.org/media/16837 Standard Plan 504.00], shall be used on all major ~~roads~~. In site-specific circumstances, the project core team may decide a Bridge Approach Slab (Major ~~Road~~), and concrete approach pavement, is excessive for the projected traffic volume or loading. In those cases, a [[131.1 Design Exception Process\|design exception]] is required and the ~~Minor Roads~~ guidance in ~~[[#503.2 Minor Roads\|~~EPG 503.2 Minor ~~Roads]]~~ shall be followed.		A reinforced concrete Bridge Approach Slab (Major), as well as the concrete approach pavement shown on [https://www.modot.org/media/16837 Standard Plan 504.00], shall be used on all major routes. In site-specific circumstances, the project core team may decide a Bridge Approach Slab (Major), and concrete approach pavement, is excessive for the projected traffic volume or loading. In those cases, a [[131.1 Design Exception Process\|design exception]] is required and the guidance in EPG 503.2 New and Replacement Bridges on Minor and Low Volume Routes shall be followed.

	===503.2 New and Replacement Bridges on Minor ~~Roads~~===		===503.2 New and Replacement Bridges on Minor and Low Volume Routes===
	The Bridge Approach Slab (Minor ~~Road~~) shall be used on all minor ~~roads~~. If the project core team concludes that a concrete Bridge Approach Slab (Major ~~Road~~) is needed on a minor ~~road~~, perhaps due to heavy traffic volume, a [[131.1 Design Exception Process\|design exception]] is required and the ~~major roads~~ guidance in EPG 503.1 Major ~~Roads~~ shall be followed.		The Bridge Approach Slab (Minor) shall be used on all minor and low volume routes. If the project core team concludes that a concrete Bridge Approach Slab (Major) is needed on a minor route, perhaps due to heavy traffic volume, a [[131.1 Design Exception Process\|design exception]] is required and the guidance in EPG 503.1 New and Replacement Bridges on Major Routes shall be followed.

	The contractor will be given the option of constructing either subclass of slab in accordance with the bridge standard drawings. (Note: asphalt is considered a subclass slab since it is similarly associated with the first 20 ft. adjacent to the bridge ends where it is thickened, crowned and placed on a specifically prepared subgrade for improved drainage).		The contractor will be given the option of constructing either subclass of slab in accordance with the bridge standard drawings. (Note: asphalt is considered a subclass slab since it is similarly associated with the first 20 ft. adjacent to the bridge ends where it is thickened, crowned and placed on a specifically prepared subgrade for improved drainage).

	The concrete approach pavement shown on [https://www.modot.org/media/16837 Standard Plan 504.00] is not to be used with the Bridge Approach Slab (Minor ~~Road~~).		The concrete approach pavement shown on [https://www.modot.org/media/16837 Standard Plan 504.00] is not to be used with the Bridge Approach Slab (Minor).

	====<center>Bridge Approach Slab (Minor ~~Road~~) Sub-class Requirements====		====<center>Bridge Approach Slab (Minor) Sub-class Requirements====
	{\| border="1" class="wikitable" style="margin: 1em auto 1em auto" style="text-align:center"		{\| border="1" class="wikitable" style="margin: 1em auto 1em auto" style="text-align:center"
	\|+		\|+
	! style="background:#BEBEBE" \|Contractor Selected Pavement Type*!! style="background:#BEBEBE" \|<u>Contractor Option:</u><br/>Bridge Approach Slab<br/>(Minor ~~Road~~) Subclass !! style="background:#BEBEBE" \|<u>Designer Option:</u><br/>Permissible Design Exception with Valid Reason		! style="background:#BEBEBE" \|Contractor Selected Pavement Type*!! style="background:#BEBEBE" \|<u>Contractor Option:</u><br/>Bridge Approach Slab<br/>(Minor) Subclass !! style="background:#BEBEBE" \|<u>Designer Option:</u><br/>Permissible Design Exception with Valid Reason
	\|-		\|-
	\|Asphalt Pavement\|\|Concrete or Asphalt Slab\|\|rowspan="2"\|A Bridge Div.- or District Design-selected subclass requires a design exception and is complicated if pavement type is district-selected, optional or alternate. Approved subclass shall be noted on the Bridge Memorandum.		\|Asphalt Pavement\|\|Concrete or Asphalt Slab\|\|rowspan="2"\|A Bridge Div.- or District Design-selected subclass requires a design exception and is complicated if pavement type is district-selected, optional or alternate. Approved subclass shall be noted on the Bridge Memorandum.
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	</center>		</center>

	The Bridge Approach Slab (Minor ~~Road~~) standard drawing will defer to the roadway plans for the asphalt mix type required for the asphalt option. District Design is responsible for specifying the mix type, which will generally match the adjacent roadway design. The mix type need not be noted on the Bridge Memorandum.		The Bridge Approach Slab (Minor) standard drawing will defer to the roadway plans for the asphalt mix type required for the asphalt option. District Design is responsible for specifying the mix type, which will generally match the adjacent roadway design. The mix type need not be noted on the Bridge Memorandum.

	<u>Guidance for Estimating Roadway Plans Quantities: </u/>		<u>Guidance for Estimating Roadway Plans Quantities: </u/>

	If asphalt is anticipated to be used for constructing the Bridge Approach Slab (Minor ~~Road~~), and the asphalt approach slab is anticipated to be placed continuously with the adjacent roadway asphalt pavement, the asphalt tonnage for the roadway asphalt pavement will need to be computed for only the roadway pavement leading up to the final 20 ft. of roadway adjacent to the bridge ends. The asphalt tonnage used for the bridge approach slabs is included in the cost of the bridge approach slab pay item.		If asphalt is anticipated to be used for constructing the Bridge Approach Slab (Minor), and the asphalt approach slab is anticipated to be placed continuously with the adjacent roadway asphalt pavement, the asphalt tonnage for the roadway asphalt pavement will need to be computed for only the roadway pavement leading up to the final 20 ft. of roadway adjacent to the bridge ends. The asphalt tonnage used for the bridge approach slabs is included in the cost of the bridge approach slab pay item.

	===503.3 Other than New and Replacement Bridges===		===503.3 Other than New and Replacement Bridges===
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	::o DE is not required if a new BAS is not used.		::o DE is not required if a new BAS is not used.
	::o DE is not required if a bridge approach slab replacement length is less than a standard 20 feet bridge approach slab to encourage partial replacement if it is the right solution.		::o DE is not required if a bridge approach slab replacement length is less than a standard 20 feet bridge approach slab to encourage partial replacement if it is the right solution.
	::o DE is not required to force a BAS (Minor ~~Road~~) optional slab sub-class on a bridge on a minor ~~road~~.		::o DE is not required to force a BAS (Minor) optional slab sub-class on a bridge on a minor or low volume route.

	===503.4 Bridge End Drainage===		===503.4 Bridge End Drainage===
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	Requirements for approach slabs constructed with asphalt will be in accordance with the either [http://www.modot.org/business/standards_and_specs/SpecbookEPG.pdf#page=7 Sec 401] or [http://www.modot.org/business/standards_and_specs/SpecbookEPG.pdf#page=7 Sec 403], as determined by the mix type to be specified on the plans.		Requirements for approach slabs constructed with asphalt will be in accordance with the either [http://www.modot.org/business/standards_and_specs/SpecbookEPG.pdf#page=7 Sec 401] or [http://www.modot.org/business/standards_and_specs/SpecbookEPG.pdf#page=7 Sec 403], as determined by the mix type to be specified on the plans.

	When a Bridge Approach Slab (Minor ~~Road~~) is constructed with asphalt, it is important to remember that the asphalt tonnage is included in the cost of the bridge approach slab pay item. If the asphalt approach slab is laid continuously with the adjacent roadway asphalt pavement, and the roadway asphalt pavement is paid per ton, the inspector will need to compute the quantity (tons) of asphalt that was needed to construct the 20 ft. approach slab and then deduct that amount from the total asphalt tonnage (i.e. ticket total) placed that day.		When a Bridge Approach Slab (Minor) is constructed with asphalt, it is important to remember that the asphalt tonnage is included in the cost of the bridge approach slab pay item. If the asphalt approach slab is laid continuously with the adjacent roadway asphalt pavement, and the roadway asphalt pavement is paid per ton, the inspector will need to compute the quantity (tons) of asphalt that was needed to construct the 20 ft. approach slab and then deduct that amount from the total asphalt tonnage (i.e. ticket total) placed that day.

	===503.6 Maintenance Activities===		===503.6 Maintenance Activities===
	See [[771.1 Concrete Bridge Approach Slab Repair: Slab Stabilization (Jacking)\|EPG 771.1 Concrete Bridge Approach Slab Repair: Slab Stabilization (Jacking)]] for additional information.		See [[771.1 Concrete Bridge Approach Slab Repair: Slab Stabilization (Jacking)\|EPG 771.1 Concrete Bridge Approach Slab Repair: Slab Stabilization (Jacking)]] for additional information.

← Older revision		Revision as of 09:20, 28 September 2018
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	</center>		</center>

	The appropriate bridge approach slab will be included on the bridge plan sheets prepared by the Bridge Division. The cost for bridge approach slabs is included in the bridge cost estimate. The concrete approach pavement shown on [~~http~~://www.modot.~~mo.gov/business/standards_and_specs~~/~~documents~~/~~50400.pdf~~ Standard Plan 504.00], which is the transition pavement between the bridge approach slab and the roadway pavement, is considered a roadway item and shall be included in the roadway cost estimate.		The appropriate bridge approach slab will be included on the bridge plan sheets prepared by the Bridge Division. The cost for bridge approach slabs is included in the bridge cost estimate. The concrete approach pavement shown on [https://www.modot.org/media/16837 Standard Plan 504.00], which is the transition pavement between the bridge approach slab and the roadway pavement, is considered a roadway item and shall be included in the roadway cost estimate.

	There are two primary classes of bridge approach slabs that follow from MoDOT roadway classification: the Bridge Approach Slab (Major Road) and the Bridge Approach Slab (Minor Road). The Bridge Approach Slab (Major Road) is a reinforced concrete slab. The Bridge Approach Slab (Minor Road) is a contractor-option slab consisting of two subclasses of slabs: either an optional lesser reinforced concrete slab, or an optional asphalt slab.		There are two primary classes of bridge approach slabs that follow from MoDOT roadway classification: the Bridge Approach Slab (Major Road) and the Bridge Approach Slab (Minor Road). The Bridge Approach Slab (Major Road) is a reinforced concrete slab. The Bridge Approach Slab (Minor Road) is a contractor-option slab consisting of two subclasses of slabs: either an optional lesser reinforced concrete slab, or an optional asphalt slab.

	===503.1 New and Replacement Bridges on Major Roads===		===503.1 New and Replacement Bridges on Major Roads===
	A reinforced concrete Bridge Approach Slab (Major Road), as well as the concrete approach pavement shown on [~~http~~://www.modot.~~mo.gov/business/standards_and_specs~~/~~documents~~/~~50400.pdf~~ Standard Plan 504.00], shall be used on all major roads. In site-specific circumstances, the project core team may decide a Bridge Approach Slab (Major Road), and concrete approach pavement, is excessive for the projected traffic volume or loading. In those cases, a [[131.1 Design Exception Process\|design exception]] is required and the Minor Roads guidance in [[#503.2 Minor Roads\|EPG 503.2 Minor Roads]] shall be followed.		A reinforced concrete Bridge Approach Slab (Major Road), as well as the concrete approach pavement shown on [https://www.modot.org/media/16837 Standard Plan 504.00], shall be used on all major roads. In site-specific circumstances, the project core team may decide a Bridge Approach Slab (Major Road), and concrete approach pavement, is excessive for the projected traffic volume or loading. In those cases, a [[131.1 Design Exception Process\|design exception]] is required and the Minor Roads guidance in [[#503.2 Minor Roads\|EPG 503.2 Minor Roads]] shall be followed.

	===503.2 New and Replacement Bridges on Minor Roads===		===503.2 New and Replacement Bridges on Minor Roads===
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	The contractor will be given the option of constructing either subclass of slab in accordance with the bridge standard drawings. (Note: asphalt is considered a subclass slab since it is similarly associated with the first 20 ft. adjacent to the bridge ends where it is thickened, crowned and placed on a specifically prepared subgrade for improved drainage).		The contractor will be given the option of constructing either subclass of slab in accordance with the bridge standard drawings. (Note: asphalt is considered a subclass slab since it is similarly associated with the first 20 ft. adjacent to the bridge ends where it is thickened, crowned and placed on a specifically prepared subgrade for improved drainage).

	The concrete approach pavement shown on [~~http~~://www.modot.~~mo.gov/business/standards_and_specs~~/~~documents~~/~~50400.pdf~~ Standard Plan 504.00] is not to be used with the Bridge Approach Slab (Minor Road).		The concrete approach pavement shown on [https://www.modot.org/media/16837 Standard Plan 504.00] is not to be used with the Bridge Approach Slab (Minor Road).

	===<center>Bridge Approach Slab (Minor Road) Sub-class Requirements===		===<center>Bridge Approach Slab (Minor Road) Sub-class Requirements===
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	Bridge end drainage provisions should be considered on every bridge job.		Bridge end drainage provisions should be considered on every bridge job.

	Bridge end drainage provisions can include concrete spill slope protection, concrete slope aprons, drain basins, curbs, and sideslope drainage provisions which includes rock blanket or drain flumes, or a combination of these. (See [[748.7 Bridge Deck and Bridge End Drainage\|EPG 748.7 Bridge Deck and Bridge End Drainage]] and [~~http~~://www.modot.~~mo.gov/business/standards_and_specs~~/~~documents~~/~~60940.pdf~~ Standard Plans 609.40] for details.)		Bridge end drainage provisions can include concrete spill slope protection, concrete slope aprons, drain basins, curbs, and sideslope drainage provisions which includes rock blanket or drain flumes, or a combination of these. (See [[748.7 Bridge Deck and Bridge End Drainage\|EPG 748.7 Bridge Deck and Bridge End Drainage]] and [https://www.modot.org/media/16882 Standard Plans 609.40] for details.)

	===503.5 Construction Inspection Guidance for [http://www.modot.org/business/standards_and_specs/SpecbookEPG.pdf#page=8 Sec 503]===		===503.5 Construction Inspection Guidance for [http://www.modot.org/business/standards_and_specs/SpecbookEPG.pdf#page=8 Sec 503]===