Category:206 Excavation for Structures - Revision history

Hoskir: updated per RR3823

2024-02-09T18:28:38Z

updated per RR3823

← Older revision		Revision as of 13:28, 9 February 2024
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	'''Cofferdams (for Sec 206.4.7).''' As specified.		'''Cofferdams (for Sec 206.4.7).''' As specified.

	'''Temporary Shoring (for Sec 206.4.8).''' Bridge Division does not review signed and sealed, temporary shoring, temporary bent, or temporary falsework plans submitted by contractors. The sole responsibility for the design and safety of such structures is entirely the contractor's. There will be some exceptions, such as cofferdams for major river bridges, or other specialized situations, but these will be specifically identified. Review by Bridge Division, however, should be sought when the contractor's temporary structure would affect any permanent MoDOT facility, such as by welding or bolting to one of our bridges. When you receive the plans from the contractor confirm that they have been signed and sealed. If you have no concerns with the submittal it can be accepted and the contractor can proceed.		'''Temporary Shoring (for Sec 206.4.8).''' Bridge Division does not review signed and sealed, temporary shoring, temporary bent, or temporary falsework plans submitted by contractors. The sole responsibility for the design and safety of such structures is entirely the contractor's. There will be some exceptions, such as cofferdams for major river bridges, or other specialized situations, but these will be specifically identified. Review by Bridge Division, however, should be sought when the contractor's temporary structure would affect any permanent MoDOT facility, such as by welding or bolting to one of our bridges or for stage construction. When you receive the plans from the contractor confirm that they have been signed and sealed. If you have no concerns with the submittal, it can be accepted, and the contractor can proceed. For design requirements for contractor option to use temporary MSE wall system see [[:Category:720_Mechanically_Stabilized_Earth_Wall_Systems#720.2_Design_Requirements\|EPG 720.2 Design Requirements]].

	'''Seal Courses (for Sec 206.4.9).''' Where seal courses are required in the contract, thickness and elevation of seal course are fixed. Where seal courses are options in the contract the [[:category:105 Control of Work#105.9 Authority and Duties of Resident Engineer (Sec 105.9)\|resident engineer]] shall determine if they should be used.		'''Seal Courses (for Sec 206.4.9).''' Where seal courses are required in the contract, thickness and elevation of seal course are fixed. Where seal courses are options in the contract the [[:category:105 Control of Work#105.9 Authority and Duties of Resident Engineer (Sec 105.9)\|resident engineer]] shall determine if they should be used.

Hoskir: Reverted edits by Hoskir (talk) to last revision by Smithk

2024-02-09T18:26:47Z

Reverted edits by Hoskir (talk) to last revision by Smithk

@@ Line 1: / Line 1: @@
 ===206.4 Construction Inspection Guidelines for [http://www.modot.org/business/standards_and_specs/SpecbookEPG.pdf#page=5 Sec 206]===
@@ Line 33: / Line 64: @@
 '''Cofferdams (for Sec 206.4.7).''' As specified.
-'''Temporary Shoring (for Sec 206.4.8).''' Bridge Division does not review signed and sealed, temporary shoring, temporary bent, or temporary falsework plans submitted by contractors. The sole responsibility for the design and safety of such structures is entirely the contractor's. There will be some exceptions, such as cofferdams for major river bridges, or other specialized situations, but these will be specifically identified. Review by Bridge Division, however, should be sought when the contractor's temporary structure would affect any permanent MoDOT facility, such as by welding or bolting to one of our bridges or for stage construction. When you receive the plans from the contractor confirm that they have been signed and sealed. If you have no concerns with the submittal, it can be accepted, and the contractor can proceed. For design requirements for contractor option to use temporary MSE wall system  see [[:Category:720_Mechanically_Stabilized_Earth_Wall_Systems#720.2_Design_Requirements|EPG 720.2 Design Requirements]].
+'''Temporary Shoring (for Sec 206.4.8).''' Bridge Division does not review signed and sealed, temporary shoring, temporary bent, or temporary falsework plans submitted by contractors. The sole responsibility for the design and safety of such structures is entirely the contractor's. There will be some exceptions, such as cofferdams for major river bridges, or other specialized situations, but these will be specifically identified. Review by Bridge Division, however, should be sought when the contractor's temporary structure would affect any permanent MoDOT facility, such as by welding or bolting to one of our bridges. When you receive the plans from the contractor confirm that they have been signed and sealed. If you have no concerns with the submittal it can be accepted and the contractor can proceed.
 '''Seal Courses (for Sec 206.4.9).'''  Where seal courses are required in the contract, thickness and elevation of seal course are fixed. Where seal courses are options in the contract the [[:category:105 Control of Work#105.9 Authority and Duties of Resident Engineer (Sec 105.9)|resident engineer]] shall determine if they should be used.

Hoskir: updated per RR3823

2024-02-09T18:24:02Z

updated per RR3823

@@ Line 1: / Line 1: @@
 ===206.4 Construction Inspection Guidelines for [http://www.modot.org/business/standards_and_specs/SpecbookEPG.pdf#page=5 Sec 206]===
@@ Line 64: / Line 33: @@
 '''Cofferdams (for Sec 206.4.7).''' As specified.
-'''Temporary Shoring (for Sec 206.4.8).''' Bridge Division does not review signed and sealed, temporary shoring, temporary bent, or temporary falsework plans submitted by contractors. The sole responsibility for the design and safety of such structures is entirely the contractor's. There will be some exceptions, such as cofferdams for major river bridges, or other specialized situations, but these will be specifically identified. Review by Bridge Division, however, should be sought when the contractor's temporary structure would affect any permanent MoDOT facility, such as by welding or bolting to one of our bridges. When you receive the plans from the contractor confirm that they have been signed and sealed. If you have no concerns with the submittal it can be accepted and the contractor can proceed.
+'''Temporary Shoring (for Sec 206.4.8).''' Bridge Division does not review signed and sealed, temporary shoring, temporary bent, or temporary falsework plans submitted by contractors. The sole responsibility for the design and safety of such structures is entirely the contractor's. There will be some exceptions, such as cofferdams for major river bridges, or other specialized situations, but these will be specifically identified. Review by Bridge Division, however, should be sought when the contractor's temporary structure would affect any permanent MoDOT facility, such as by welding or bolting to one of our bridges or for stage construction. When you receive the plans from the contractor confirm that they have been signed and sealed. If you have no concerns with the submittal, it can be accepted, and the contractor can proceed. For design requirements for contractor option to use temporary MSE wall system  see [[:Category:720_Mechanically_Stabilized_Earth_Wall_Systems#720.2_Design_Requirements|EPG 720.2 Design Requirements]].
 '''Seal Courses (for Sec 206.4.9).'''  Where seal courses are required in the contract, thickness and elevation of seal course are fixed. Where seal courses are options in the contract the [[:category:105 Control of Work#105.9 Authority and Duties of Resident Engineer (Sec 105.9)|resident engineer]] shall determine if they should be used.

Smithk: updated broken link

2022-02-17T17:13:12Z

updated broken link

← Older revision		Revision as of 12:13, 17 February 2022
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	<div id="When a seal course is specified"></div>		<div id="When a seal course is specified"></div>
	When a seal course is specified in a contract it should not be omitted or changed without approval by the [http://~~wwwi~~/~~intranet~~/cm/ Construction and Materials Division]. If the seal course is omitted, the bottom of footing shall be placed at the elevation shown on the plans. If placing the bottom of footing at plan elevation is not possible, the footing or other parts of the substructure may need to be redesigned. The [https://modotgov.sharepoint.com/sites/br Bridge Division] should be contacted.		When a seal course is specified in a contract it should not be omitted or changed without approval by the [http://sp/sites/cm/Pages/default.aspx Construction and Materials Division]. If the seal course is omitted, the bottom of footing shall be placed at the elevation shown on the plans. If placing the bottom of footing at plan elevation is not possible, the footing or other parts of the substructure may need to be redesigned. The [https://modotgov.sharepoint.com/sites/br Bridge Division] should be contacted.

	'''Backfill (for Sec 206.4.10).''' As specified.		'''Backfill (for Sec 206.4.10).''' As specified.

Smithk: /* 206.4 Construction Inspection Guidelines for Sec 206 */ updated broken BR division link

2021-12-17T20:49:31Z

206.4 Construction Inspection Guidelines for Sec 206: updated broken BR division link

← Older revision		Revision as of 15:49, 17 December 2021
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	<div id="When a seal course is specified"></div>		<div id="When a seal course is specified"></div>
	When a seal course is specified in a contract it should not be omitted or changed without approval by the [http://wwwi/intranet/cm/ Construction and Materials Division]. If the seal course is omitted, the bottom of footing shall be placed at the elevation shown on the plans. If placing the bottom of footing at plan elevation is not possible, the footing or other parts of the substructure may need to be redesigned. The [~~http~~://~~wwwi~~/~~intranet~~/br~~/default.htm~~ Bridge Division] should be contacted.		When a seal course is specified in a contract it should not be omitted or changed without approval by the [http://wwwi/intranet/cm/ Construction and Materials Division]. If the seal course is omitted, the bottom of footing shall be placed at the elevation shown on the plans. If placing the bottom of footing at plan elevation is not possible, the footing or other parts of the substructure may need to be redesigned. The [https://modotgov.sharepoint.com/sites/br Bridge Division] should be contacted.

	'''Backfill (for Sec 206.4.10).''' As specified.		'''Backfill (for Sec 206.4.10).''' As specified.

Smithk: /* 206.4 Construction Inspection Guidelines for Sec 206 */ Per CM, added new guidance to clarify culvert cleanout expectations.

2021-11-22T16:40:47Z

206.4 Construction Inspection Guidelines for Sec 206: Per CM, added new guidance to clarify culvert cleanout expectations.

← Older revision		Revision as of 11:40, 22 November 2021
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	'''Construction Guidance for Sec 206.6.1.1.''' Sometime the contractor elects to undergrade a few inches and backfill with granular material at the contractor's expense to provide an easily maintained base on which to construct the culvert. This is a satisfactory procedure. Payment should not be authorized for removal or replacement of material in this situation, or when the foundation is unsuitable due to improper methods of construction. If the underlying foundation is inherently unsound and must be removed to a substantial depth to obtain stability, the contractor is to be compensated for the excavation and the delivered cost of the granular backfill material.		'''Construction Guidance for Sec 206.6.1.1.''' Sometime the contractor elects to undergrade a few inches and backfill with granular material at the contractor's expense to provide an easily maintained base on which to construct the culvert. This is a satisfactory procedure. Payment should not be authorized for removal or replacement of material in this situation, or when the foundation is unsuitable due to improper methods of construction. If the underlying foundation is inherently unsound and must be removed to a substantial depth to obtain stability, the contractor is to be compensated for the excavation and the delivered cost of the granular backfill material.
			<div id="Culvert Cleanout (for Sec 206.6.10)."></div>
			'''Culvert Cleanout (for Sec 206.6.10).''' Culverts shall be cleaned of all silt and debris and contractor should protect against re-silting until final stabilization. Consult the plans and JSPs for any special instructions. Payment shall be made for a single cleanout per structure. If the culvert silts back in prior to project completion, the contractor shall reclean at no additional cost.

Smithk: updated links

2016-06-08T19:22:54Z

updated links

← Older revision		Revision as of 14:22, 8 June 2016
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	Excavation quantities for structures, when measured, are calculated in accordance with [[media:206.2 Maximum Limits for Class 3 Excavation.jpg\|Fig. 206.2]], [[Media:206.4 Maximum Limits for Class 4 Excavation.jpg\|Fig. 206.4]], [[Media:206.5 Maximum Limits for Class 4 Excavation for Extending.jpg\|Fig. 206.5]] and applicable standard plans. Refer to [http://www.modot.~~mo.gov~~/business/standards_and_specs/~~Sec0206~~.pdf Sec 206] for MoDOT’s specifications.		Excavation quantities for structures, when measured, are calculated in accordance with [[media:206.2 Maximum Limits for Class 3 Excavation.jpg\|Fig. 206.2]], [[Media:206.4 Maximum Limits for Class 4 Excavation.jpg\|Fig. 206.4]], [[Media:206.5 Maximum Limits for Class 4 Excavation for Extending.jpg\|Fig. 206.5]] and applicable standard plans. Refer to [http://www.modot.org/business/standards_and_specs/SpecbookEPG.pdf#page=5 Sec 206] for MoDOT’s specifications.

	{\|style="padding: 0.3em; margin-left:15px; border:1px solid #a9a9a9; text-align:center; font-size: 95%; background:#f5f5f5" width="160px" align="right"		{\|style="padding: 0.3em; margin-left:15px; border:1px solid #a9a9a9; text-align:center; font-size: 95%; background:#f5f5f5" width="160px" align="right"
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	===206.2 Class 3 Excavation===		===206.2 Class 3 Excavation===

	Class 3 Excavation applies to excavation for pipe installations such as pipe culverts, utilities, retrofit pipe culverts (extensions), drop inlets and manholes. Estimated quantities should be included in the plans. [http://www.modot.~~mo.gov~~/business/standards_and_specs/~~Sec0206~~.pdf Sec 206] defines the payment limits for Class 3 Excavation. When two pipe diameters are shown on the plans, the larger of the two diameters will be used to calculate plan quantity.		Class 3 Excavation applies to excavation for pipe installations such as pipe culverts, utilities, retrofit pipe culverts (extensions), drop inlets and manholes. Estimated quantities should be included in the plans. [http://www.modot.org/business/standards_and_specs/SpecbookEPG.pdf#page=5 Sec 206] defines the payment limits for Class 3 Excavation. When two pipe diameters are shown on the plans, the larger of the two diameters will be used to calculate plan quantity.

	[[image:206.2.jpg\|630px\|center]]		[[image:206.2.jpg\|630px\|center]]

	When trenching is required for utility pipe, retrofit culvert installations (extensions), manholes or drop inlets, Class 3 Excavation quantities are calculated and included with the pay item (refer to [http://www.modot.~~mo.gov~~/business/standards_and_specs/~~Sec0206~~.pdf Sec 206]).		When trenching is required for utility pipe, retrofit culvert installations (extensions), manholes or drop inlets, Class 3 Excavation quantities are calculated and included with the pay item (refer to [http://www.modot.org/business/standards_and_specs/SpecbookEPG.pdf#page=5 Sec 206]).

	===206.3 Class 4 Excavation===		===206.3 Class 4 Excavation===

	Class 4 Excavation applies to excavation for box culverts, small retaining walls and other miscellaneous structures. [http://www.modot.~~mo.gov~~/business/standards_and_specs/~~Sec0206~~.pdf Sec 206] provides for the payment of plan quantities of Class 4 Excavation for box culverts not classified as bridges, so care is exercised in computing the quantities.		Class 4 Excavation applies to excavation for box culverts, small retaining walls and other miscellaneous structures. [http://www.modot.org/business/standards_and_specs/SpecbookEPG.pdf#page=5 Sec 206] provides for the payment of plan quantities of Class 4 Excavation for box culverts not classified as bridges, so care is exercised in computing the quantities.

	Field quantities are measured for box culverts classified as bridges. Each structure is checked carefully on the field checks, and appropriate notes are made to ensure that the quantities are as accurate as possible. A common error is to compute only the quantities below the ditch flowline where the structure approaches or exceeds the width of the natural ditch. Class 4 Excavation does not include removal of existing headwalls or portions of the existing box culvert. These items should be handled as removal of improvements for roadway culverts or partial removal of culvert concrete for bridge culverts. Care is exercised to avoid duplicate payment for the same excavation, such as computing Class 4 Excavation where channel change quantities or roadway excavation has been computed.		Field quantities are measured for box culverts classified as bridges. Each structure is checked carefully on the field checks, and appropriate notes are made to ensure that the quantities are as accurate as possible. A common error is to compute only the quantities below the ditch flowline where the structure approaches or exceeds the width of the natural ditch. Class 4 Excavation does not include removal of existing headwalls or portions of the existing box culvert. These items should be handled as removal of improvements for roadway culverts or partial removal of culvert concrete for bridge culverts. Care is exercised to avoid duplicate payment for the same excavation, such as computing Class 4 Excavation where channel change quantities or roadway excavation has been computed.

	===206.4 Construction Inspection Guidelines for [http://www.modot.~~mo.gov~~/business/standards_and_specs/~~Sec0206~~.pdf Sec 206]===		===206.4 Construction Inspection Guidelines for [http://www.modot.org/business/standards_and_specs/SpecbookEPG.pdf#page=5 Sec 206]===

	'''Description (for Sec 206.1).''' As specified.		'''Description (for Sec 206.1).''' As specified.

Smithk: /* 206.2 Class 3 Excavation */ Per CM, diagram reintroduced into article.

2014-03-03T17:27:09Z

206.2 Class 3 Excavation: Per CM, diagram reintroduced into article.

← Older revision		Revision as of 12:27, 3 March 2014
Line 19:		Line 19:

	Class 3 Excavation applies to excavation for pipe installations such as pipe culverts, utilities, retrofit pipe culverts (extensions), drop inlets and manholes. Estimated quantities should be included in the plans. [http://www.modot.mo.gov/business/standards_and_specs/Sec0206.pdf Sec 206] defines the payment limits for Class 3 Excavation. When two pipe diameters are shown on the plans, the larger of the two diameters will be used to calculate plan quantity.		Class 3 Excavation applies to excavation for pipe installations such as pipe culverts, utilities, retrofit pipe culverts (extensions), drop inlets and manholes. Estimated quantities should be included in the plans. [http://www.modot.mo.gov/business/standards_and_specs/Sec0206.pdf Sec 206] defines the payment limits for Class 3 Excavation. When two pipe diameters are shown on the plans, the larger of the two diameters will be used to calculate plan quantity.

			[[image:206.2.jpg\|630px\|center]]

	When trenching is required for utility pipe, retrofit culvert installations (extensions), manholes or drop inlets, Class 3 Excavation quantities are calculated and included with the pay item (refer to [http://www.modot.mo.gov/business/standards_and_specs/Sec0206.pdf Sec 206]).		When trenching is required for utility pipe, retrofit culvert installations (extensions), manholes or drop inlets, Class 3 Excavation quantities are calculated and included with the pay item (refer to [http://www.modot.mo.gov/business/standards_and_specs/Sec0206.pdf Sec 206]).

Smithk: /* 206.2 Class 3 Excavation */

2012-12-20T16:55:12Z

206.2 Class 3 Excavation

← Older revision		Revision as of 11:55, 20 December 2012
Line 19:		Line 19:

	Class 3 Excavation applies to excavation for pipe installations such as pipe culverts, utilities, retrofit pipe culverts (extensions), drop inlets and manholes. Estimated quantities should be included in the plans. [http://www.modot.mo.gov/business/standards_and_specs/Sec0206.pdf Sec 206] defines the payment limits for Class 3 Excavation. When two pipe diameters are shown on the plans, the larger of the two diameters will be used to calculate plan quantity.		Class 3 Excavation applies to excavation for pipe installations such as pipe culverts, utilities, retrofit pipe culverts (extensions), drop inlets and manholes. Estimated quantities should be included in the plans. [http://www.modot.mo.gov/business/standards_and_specs/Sec0206.pdf Sec 206] defines the payment limits for Class 3 Excavation. When two pipe diameters are shown on the plans, the larger of the two diameters will be used to calculate plan quantity.

	~~[[image:206.2.jpg\|630px\|center]]~~

	When trenching is required for utility pipe, retrofit culvert installations (extensions), manholes or drop inlets, Class 3 Excavation quantities are calculated and included with the pay item (refer to [http://www.modot.mo.gov/business/standards_and_specs/Sec0206.pdf Sec 206]).		When trenching is required for utility pipe, retrofit culvert installations (extensions), manholes or drop inlets, Class 3 Excavation quantities are calculated and included with the pay item (refer to [http://www.modot.mo.gov/business/standards_and_specs/Sec0206.pdf Sec 206]).

Smithk: /* 206.2 Class 3 Excavation */ Per CM, revision provides pay quantities that allow the contractor to bid more accurately

2012-12-20T15:42:56Z

206.2 Class 3 Excavation: Per CM, revision provides pay quantities that allow the contractor to bid more accurately

← Older revision		Revision as of 10:42, 20 December 2012
Line 18:		Line 18:
	===206.2 Class 3 Excavation===		===206.2 Class 3 Excavation===

	Class 3 Excavation applies to excavation for pipe installations such as utilities, retrofit pipe culverts (extensions), drop inlets and manholes. ~~According to [http://www.modot~~.~~mo.gov/business/standards_and_specs/Sec0725.pdf Sec 725],~~ [http://www.modot.mo.gov/business/standards_and_specs/~~Sec0726~~.pdf Sec ~~726~~] ~~and [http://www.modot.mo.gov/business/standards_and_specs/Sec0730.pdf Sec 730], no direct~~ payment ~~is made~~ for ~~excavation and backfilling for crossroad~~ pipe ~~culvert installation~~.		Class 3 Excavation applies to excavation for pipe installations such as pipe culverts, utilities, retrofit pipe culverts (extensions), drop inlets and manholes. Estimated quantities should be included in the plans. [http://www.modot.mo.gov/business/standards_and_specs/Sec0206.pdf Sec 206] defines the payment limits for Class 3 Excavation. When two pipe diameters are shown on the plans, the larger of the two diameters will be used to calculate plan quantity.

	{\|		[[image:206.2.jpg\|630px\|center]]
	\|[[~~Image~~:206 ~~Class 3 drop inlets~~.jpg\|~~600 px]]~~
	\|-
	~~\|align="~~center~~" \| [[Image:206 Class 3 pipe.jpg \| center \|500 px~~]]
	\|}

	When trenching is required for utility pipe, retrofit culvert installations (extensions), manholes or drop inlets, Class 3 Excavation quantities are calculated and included with the pay item (refer to [http://www.modot.mo.gov/business/standards_and_specs/Sec0206.pdf Sec 206]).		When trenching is required for utility pipe, retrofit culvert installations (extensions), manholes or drop inlets, Class 3 Excavation quantities are calculated and included with the pay item (refer to [http://www.modot.mo.gov/business/standards_and_specs/Sec0206.pdf Sec 206]).