Category:760 General Construction Inspection for Structures - Revision history

Smithk: Updated CM website links (for increased security)

2021-10-22T18:23:54Z

Updated CM website links (for increased security)

← Older revision		Revision as of 13:23, 22 October 2021
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	\|'''Forms'''		\|'''Forms'''
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	\|[~~http~~://epg.modot.~~mo.gov~~/forms/CM/Bridge_Clearance_Report_C239A.pdf Bridge Clearance Report Form]		\|[https://epg.modot.org/forms/CM/Bridge_Clearance_Report_C239A.pdf Bridge Clearance Report Form]
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	:'''1.''' At least two weeks before any change in vertical clearance, district personnel should advise Transportation Planning and the Motor Carrier Services Permit Office, via the BridgeClearanceReport email group, of the projected change in clearance.		:'''1.''' At least two weeks before any change in vertical clearance, district personnel should advise Transportation Planning and the Motor Carrier Services Permit Office, via the BridgeClearanceReport email group, of the projected change in clearance.
	:'''2.''' Actual clearances should be measured in the field after any structure is placed across the roadway (including phased construction elements such as girders) or any time the clearance has changed significantly during construction due to setting deck panels, pouring the decks, placing construction forms or falsework, etc. An email should be sent to the BridgeClearanceReport email group.		:'''2.''' Actual clearances should be measured in the field after any structure is placed across the roadway (including phased construction elements such as girders) or any time the clearance has changed significantly during construction due to setting deck panels, pouring the decks, placing construction forms or falsework, etc. An email should be sent to the BridgeClearanceReport email group.
	:'''3.''' The final vertical clearance should be measured and reported when the vertical clearance is permanent. A Bridge Clearance Report form (C-239A) should be sent to the BridgeClearanceReport email group. (See [~~http~~://epg.modot.~~mo.gov~~/forms/CM/Bridge_Clearance_Report_C239A.pdf Bridge Clearance Report Form]).		:'''3.''' The final vertical clearance should be measured and reported when the vertical clearance is permanent. A Bridge Clearance Report form (C-239A) should be sent to the BridgeClearanceReport email group. (See [https://epg.modot.org/forms/CM/Bridge_Clearance_Report_C239A.pdf Bridge Clearance Report Form]).
	:'''4.''' Vertical Clearance data that is entered into TMS will be assigned a clearance measurement date, which will be either the actual date it was measured, if known, or the date that the measurement was entered into TMS. Clearances should be remeasured every five years to ensure that an accurate database of vertical clearance measurements is maintained for the structures.		:'''4.''' Vertical Clearance data that is entered into TMS will be assigned a clearance measurement date, which will be either the actual date it was measured, if known, or the date that the measurement was entered into TMS. Clearances should be remeasured every five years to ensure that an accurate database of vertical clearance measurements is maintained for the structures.

Smithk: Inclusive language

2021-06-04T12:58:52Z

Inclusive language

← Older revision		Revision as of 07:58, 4 June 2021
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	==760.2 Inspector's Diary==		==760.2 Inspector's Diary==
	Structure inspectors should keep a daily diary covering all operations. The amount of information to be kept is at the discretion of ~~the~~ resident ~~engineer~~ who must decide how much of		Structure inspectors should keep a daily diary covering all operations. The amount of information to be kept is at the discretion of resident engineers who must decide how much of the detailed record will be kept in their own diary. The resident engineer has the ultimate responsibility for maintaining a complete written history of the project, even though delegating portions of the task to others.
	the detailed record will be kept in ~~his~~ own diary. The resident engineer has the ultimate responsibility for maintaining a complete written history of the project, even though delegating
	portions of the task to others.

	On a large bridge, such as a major stream crossing, a well organized inspection team is needed. One or more inspectors should be assigned to each major work phase under general supervision of a chief inspector. Typical major work phases are pile driving, substructure inspection, falsework and grades, superstructure forming, painting, slab inspection, and related work. Many phases may be in progress at the same time. The inspectors assigned to any phase will be the best qualified to prepare a detailed record of events concerning their area of responsibility. Their diary should contain considerable detail such as records of all instructions to the contractor's representative, a detailed description of active work in their area of responsibility, and a complete record of any unusual occurrences on the job, such as methods which might affect job quality, unusual storms, abnormally high water, a list of all equipment and manpower, etc. The diary is a history. It should not be confused with field data books for items such as grades, moisture tests, slump, etc., nor should it duplicate this data. Keep entries neat and systematic.		On a large bridge, such as a major stream crossing, a well organized inspection team is needed. One or more inspectors should be assigned to each major work phase under general supervision of a chief inspector. Typical major work phases are pile driving, substructure inspection, falsework and grades, superstructure forming, painting, slab inspection, and related work. Many phases may be in progress at the same time. The inspectors assigned to any phase will be the best qualified to prepare a detailed record of events concerning their area of responsibility. Their diary should contain considerable detail such as records of all instructions to the contractor's representative, a detailed description of active work in their area of responsibility, and a complete record of any unusual occurrences on the job, such as methods which might affect job quality, unusual storms, abnormally high water, a list of all equipment and manpower, etc. The diary is a history. It should not be confused with field data books for items such as grades, moisture tests, slump, etc., nor should it duplicate this data. Keep entries neat and systematic.

Smithk: Per CM, updated link for Bridge Clearance Report form

2020-02-21T15:17:49Z

Per CM, updated link for Bridge Clearance Report form

← Older revision		Revision as of 10:17, 21 February 2020
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	\|'''Forms'''		\|'''Forms'''
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	\|[~~[media~~:~~760~~.4.~~2 Bridge Clearance Report~~.~~docx\|~~Bridge Clearance Report Form]]		\|[http://epg.modot.mo.gov/forms/CM/Bridge_Clearance_Report_C239A.pdf Bridge Clearance Report Form]
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	:'''1.''' At least two weeks before any change in vertical clearance, district personnel should advise Transportation Planning and the Motor Carrier Services Permit Office, via the BridgeClearanceReport email group, of the projected change in clearance.		:'''1.''' At least two weeks before any change in vertical clearance, district personnel should advise Transportation Planning and the Motor Carrier Services Permit Office, via the BridgeClearanceReport email group, of the projected change in clearance.
	:'''2.''' Actual clearances should be measured in the field after any structure is placed across the roadway (including phased construction elements such as girders) or any time the clearance has changed significantly during construction due to setting deck panels, pouring the decks, placing construction forms or falsework, etc. An email should be sent to the BridgeClearanceReport email group.		:'''2.''' Actual clearances should be measured in the field after any structure is placed across the roadway (including phased construction elements such as girders) or any time the clearance has changed significantly during construction due to setting deck panels, pouring the decks, placing construction forms or falsework, etc. An email should be sent to the BridgeClearanceReport email group.
	:'''3.''' The final vertical clearance should be measured and reported when the vertical clearance is permanent. A Bridge Clearance Report form (C-239A) should be sent to the BridgeClearanceReport email group. (See [~~[media~~:~~760~~.4.~~2 Bridge Clearance Report~~.~~docx\|~~Bridge Clearance Report Form]]).		:'''3.''' The final vertical clearance should be measured and reported when the vertical clearance is permanent. A Bridge Clearance Report form (C-239A) should be sent to the BridgeClearanceReport email group. (See [http://epg.modot.mo.gov/forms/CM/Bridge_Clearance_Report_C239A.pdf Bridge Clearance Report Form]).
	:'''4.''' Vertical Clearance data that is entered into TMS will be assigned a clearance measurement date, which will be either the actual date it was measured, if known, or the date that the measurement was entered into TMS. Clearances should be remeasured every five years to ensure that an accurate database of vertical clearance measurements is maintained for the structures.		:'''4.''' Vertical Clearance data that is entered into TMS will be assigned a clearance measurement date, which will be either the actual date it was measured, if known, or the date that the measurement was entered into TMS. Clearances should be remeasured every five years to ensure that an accurate database of vertical clearance measurements is maintained for the structures.

EPGsysop: /* 760.1 Preparation For Inspection */Per CM and BR, clarified overhead work on bridges safety guidance

2017-08-10T14:23:49Z

760.1 Preparation For Inspection: Per CM and BR, clarified overhead work on bridges safety guidance

← Older revision		Revision as of 09:23, 10 August 2017
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	::e. Compressive test machine and capping set.		::e. Compressive test machine and capping set.

			===Bridge Work Over Traffic===
			Bridge work by contractor or MoDOT forces, including erection, rehabilitation, or demolition, should not be allowed over traffic unless a bridge platform protection system is installed below the work area except for work performed above a deck that is intact. The protection system is necessary to catch falling objects such as tools, overhang brackets or materials. Lifting of objects that are heavier than the capacity of the bridge protection system should not be allowed. For example, swinging or setting large objects such as girders and deck panels over traffic should not be allowed even with a bridge protection system in place.

	==760.2 Inspector's Diary==		==760.2 Inspector's Diary==

EPGsysop at 17:48, 9 June 2017

2017-06-09T17:48:13Z

← Older revision		Revision as of 12:48, 9 June 2017
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	{\|style="padding: 0.3em; margin-left:15px; border:2px solid #a9a9a9; text-align:center; font-size: 95%; background:#f5f5f5" width="260px" align="right"		{\|style="padding: 0.3em; margin-left:15px; border:2px solid #a9a9a9; text-align:center; font-size: 95%; background:#f5f5f5" width="260px" align="right"
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	\|[[media:760.4.2 FAQ.docx\|Reporting of Changes to Bridge Clearance FAQs]]		\|[[media:760.4.2 FAQ 2017.docx\|Reporting of Changes to Bridge Clearance FAQs]]
	\|}		\|}

EPGsysop: Per TP, also updated FAQ document

2017-06-09T17:47:46Z

Per TP, also updated FAQ document

← Older revision		Revision as of 12:47, 9 June 2017
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	\|'''FAQ'''		\|'''FAQ'''
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	\|[[media:760.4.2 FAQ.docx\|Reporting of Changes to Bridge Clearance FAQs]]		\|[[media:760.4.2 FAQ 2017.docx\|Reporting of Changes to Bridge Clearance FAQs]]
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	\|'''Video'''		\|'''Video'''

EPGsysop: /* 760.4 Vertical Clearance */Per TP, expanded and clarified guidance for the measurement and reporting of vertical clearance.

2017-06-09T17:37:35Z

760.4 Vertical Clearance: Per TP, expanded and clarified guidance for the measurement and reporting of vertical clearance.

← Older revision		Revision as of 12:37, 9 June 2017
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	===760.4.1 Responsibility===		===760.4.1 Responsibility===
	District personnel shall be responsible for measuring vertical clearances on all bridges over state routes, ~~other roadways~~ and railroads. This includes measuring clearances on new bridges that are open to traffic and ~~anytime~~ the clearance changes due to construction or maintenance ~~project~~.		District personnel shall be responsible for measuring vertical clearances on all bridges over state routes, county roads, city streets and railroads. This includes measuring clearances on new bridges and rehabilitations that are open to traffic and measuring any time the clearance changes due to construction or maintenance projects. All bridge clearances should be verified every five years. Transportation Planning is responsible for keeping the master records of vertical clearance measurements, which are used by the Motor Carrier Services Oversize/Overweight Permits office.

	~~The Motor Carrier Services [http://www.modot~~.~~org/mcs/ Oversize/Overweight Permits office] and~~ Transportation Planning ~~are~~ responsible for keeping the master records of vertical clearance measurements.

	===760.4.2 Notification Requirements===		===760.4.2 Notification Requirements===
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	\|}		\|}

	At least two weeks before any change in vertical clearance, district personnel should advise the Motor Carrier Services Permit Office ~~by Email or letter~~ of the projected change in clearance. The final vertical clearance should be measured ~~in the field~~ and reported ~~as soon as possible after~~ the vertical ~~change~~ is permanent. (See [[media:760.4.2 Bridge Clearance Report.docx\|Bridge Clearance Report Form]]).		Clearances shall be submitted at the following times:

			:'''1.''' At least two weeks before any change in vertical clearance, district personnel should advise Transportation Planning and the Motor Carrier Services Permit Office, via the BridgeClearanceReport email group, of the projected change in clearance.
			:'''2.''' Actual clearances should be measured in the field after any structure is placed across the roadway (including phased construction elements such as girders) or any time the clearance has changed significantly during construction due to setting deck panels, pouring the decks, placing construction forms or falsework, etc. An email should be sent to the BridgeClearanceReport email group.
			:'''3.''' The final vertical clearance should be measured and reported when the vertical clearance is permanent. A Bridge Clearance Report form (C-239A) should be sent to the BridgeClearanceReport email group. (See [[media:760.4.2 Bridge Clearance Report.docx\|Bridge Clearance Report Form]]).
			:'''4.''' Vertical Clearance data that is entered into TMS will be assigned a clearance measurement date, which will be either the actual date it was measured, if known, or the date that the measurement was entered into TMS. Clearances should be remeasured every five years to ensure that an accurate database of vertical clearance measurements is maintained for the structures.

	===760.4.3 Measurement Requirements===		===760.4.3 Roadway Measurement Requirements===
	Vertical clearance shall be measured on every project. This includes rehabilitation and resurfacing work as well as new construction and any temporary restrictions. Minimum vertical clearance measurements for bridges over state routes ~~and~~ city ~~or county~~ streets shall be taken and reported to the Motor Carrier Services Oversize/Overweight Permits office.		Vertical clearance shall be measured on every project. This includes rehabilitation and resurfacing work as well as new construction and any temporary restrictions. Minimum vertical clearance measurements for bridges over state routes, county roads, or city streets shall be taken and reported to Transportation Planning and the Motor Carrier Services Oversize/Overweight Permits office via the BridgeClearanceReport email group.

	When measuring vertical clearance, the following should be kept in mind:		When measuring vertical clearance, the following should be kept in mind:

	1. All measurements shall be taken on the roadway surfaces only and not on the shoulders, even though the minimum clearance may be less on the shoulders.		:'''1.''' All measurements shall be taken on the roadway surfaces only and not on the shoulders, even though the minimum clearance may be less on the shoulders.

	2. One bridge over ~~several~~ routes will require ~~several vertical clearance measurements. Over divided highways,~~ a vertical clearance for each direction ~~shall be measured and reported~~.		:'''2.''' One bridge over multiple routes, including ramps, will require a vertical clearance measurement for each route and in each direction of travel.

	3. Measurement shall be made from the bottom of the lowest obstruction (beam, concrete, light fixture, rivet or bolt head, through truss member, etc.). This clearance shall be measured and rounded down to the nearest inch and reported to the Motor Carrier Services ~~[http://www.modot.org/mcs/~~ Oversize/Overweight Permits office].		:'''3.''' Measurement shall be made from the bottom of the lowest obstruction (beam, concrete, light fixture, rivet or bolt head, through truss member, etc.). This clearance shall be measured and rounded down to the nearest inch and reported to Transportation Planning and the Motor Carrier Services Oversize/Overweight Permits office via the BridgeClearanceReport email group.

	4. Measurement information shall include structure identification number, route, and county. Also identify the route over which the structure spans. When several roadways are involved, identify all roadways and structures with the proper clearances. For clarity, a sketch of the structure with measurements shown can be ~~used~~.		:'''4.''' Measurement information shall include structure identification number, route, and county. Also identify the route and direction over which the structure spans. When several roadways are involved, identify all roadways and structures with the proper clearances. For clarity, a sketch of the structure with measurements shown can be included.

	===760.4.4 Railroad Vertical and Horizontal Clearances===		===760.4.4 Railroad Vertical and Horizontal Clearances===
	When the rehabilitation or new construction involves a structure over a railroad not only should the vertical clearance be taken, but the horizontal clearances to the nearest obstacle should also be taken.		When the rehabilitation or new construction involves a structure over a railroad not only should the vertical clearance be taken, but the horizontal clearances to the nearest obstacle should also be taken.

	This horizontal measurement should be taken from a point half way between the two rails of the railroad track to the nearest obstacle. (See [[751.5 Standard Details\|Bridge Standard Details - Horizontal and Vertical Clearance]] for more information on measurement). If multiple tracks are located under a structure additional measurements should be taken. ~~This information is not only to~~ be ~~sent~~ to the ~~State~~ Bridge ~~Maintenance Engineer~~ and ~~the Oversize/Overweight Permits office but~~ should also be sent to the ~~Rail~~ Projects Manager located in Multimodal Operations ~~located in General Headquarters of MoDOT. They~~ will in turn submit ~~the~~ information to the respective railroad company for their ~~information~~.		This horizontal measurement should be taken from a point half way between the two rails of the railroad track to the nearest obstacle. (See [[751.5 Standard Details\|Bridge Standard Details - Horizontal and Vertical Clearance]] for more information on measurement.) If multiple tracks are located under a structure additional measurements should be taken. Vertical clearance measurements should be submitted to Transportation Planning on the Bridge Clearance Report form via the BridgeClearanceReport email group. Both vertical and horizontal clearance information should also be sent to the Railroad Projects Manager located in Multimodal Operations at Central Office, who will in turn submit this information to the respective railroad company for their records.

	When measuring horizontal and vertical clearance, the following should be kept in mind:		When measuring horizontal and vertical clearance, the following should be kept in mind:

	1. One bridge over several tracks will require several vertical clearance measurements. .		:'''1.''' One bridge over several tracks will require several vertical clearance measurements.

	2. All measurements for railroads are to be taken above the top of the rails and for a width of 12 ft., centered on the rails. Report actual vertical ~~clearance~~.		:'''2.''' All measurements for railroads are to be taken above the top of the rails and for a width of 18 ft., centered on the rails. This provides the vertical clearance for the width of a standard rail car plus anything it may be hauling that would extend beyond the sides of the car. Report actual vertical clearances.

	3. Measurements shall be made from the bottom of the lowest obstruction.		:'''3.''' Measurements shall be made from the bottom of the lowest obstruction.

	4. Measurement information shall include structure identification number, route, and county. When more than one railroad track is involved, identify each work track with the proper clearance. For clarity, a sketch of the structure with measurements shown can be ~~used~~.		:'''4.''' Measurement information shall include structure identification number, route, and county. When more than one railroad track is involved, identify each work track with the proper clearance. For clarity, a sketch of the structure with measurements shown can be included.

	5. Horizontal clearances are measured from the center of the track to the nearest lateral obstruction (usually the closest pier) . The minimum clearances are normally shown on the plans and this must be maintained upon completion of the project. The plans should indicate a minimum horizontal clearance for temporary construction. If this information is not indicated on the plans, contact the Rail Projects Manager in Multimodal Operation immediately.		:'''5.''' Horizontal clearances are measured from the center of the track to the nearest lateral obstruction (usually the closest pier). The minimum clearances are normally shown on the plans and this must be maintained upon completion of the project. The plans should indicate a minimum horizontal clearance for temporary construction. If this information is not indicated on the plans, contact the Rail Projects Manager in Multimodal Operation immediately.

Smithk: /* 760.3.1 General */

2016-07-06T12:49:28Z

760.3.1 General

← Older revision		Revision as of 07:49, 6 July 2016
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	==760.3 Staking Structures==		==760.3 Staking Structures==
	===760.3.1 General===		===760.3.1 General===
	Recommended procedures for staking structures are outlined in [[238.4 Construction Surveying#238.4.25 Staking structures\|Construction Surveying - Staking Structures]]. The responsible MoDOT personnel shall satisfy themselves by independent check that staking is complete and accurate. Sometimes the bridge survey will have been made so far in advance of construction that radical changes have occurred in stream meander and flow lines. Large changes could affect the position of the bridge relative to the stream bed and nullify information shown on the plans. During staking this should be checked by taking a profile across the stream along the roadway centerline and a stream bed profile approximately 300 feet up and downstream. If large changes are found in either of the above, it may be necessary to shift the structure or revise footing elevations. The data should be sent to the district office for review and for transmittal to the Bridge Division if a design review appears warranted. Once staking is complete and checked, the resident engineer or the chief inspector should review the staking in detail with the contractor's authorized representative to be sure ~~she/he~~ knows the location and purpose of each stake.		Recommended procedures for staking structures are outlined in [[238.4 Construction Surveying#238.4.25 Staking structures\|Construction Surveying - Staking Structures]]. The responsible MoDOT personnel shall satisfy themselves by independent check that staking is complete and accurate. Sometimes the bridge survey will have been made so far in advance of construction that radical changes have occurred in stream meander and flow lines. Large changes could affect the position of the bridge relative to the stream bed and nullify information shown on the plans. During staking this should be checked by taking a profile across the stream along the roadway centerline and a stream bed profile approximately 300 feet up and downstream. If large changes are found in either of the above, it may be necessary to shift the structure or revise footing elevations. The data should be sent to the district office for review and for transmittal to the Bridge Division if a design review appears warranted. Once staking is complete and checked, the resident engineer or the chief inspector should review the staking in detail with the contractor's authorized representative to be sure the individual knows the location and purpose of each stake.

	===760.3.2 Control Points===		===760.3.2 Control Points===

Smithk: updated link

2016-06-14T13:19:07Z

updated link

← Older revision		Revision as of 08:19, 14 June 2016
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	footings, columns, caps, anchor bolt wells, and bearing devices.		footings, columns, caps, anchor bolt wells, and bearing devices.

	The division of responsibility under which the engineer is responsible for control points (always set on permanently fixed objects) and the contractor for intermediate points (on forms or temporary objects) is established by [http://modot.~~mo.gov~~/business/standards_and_specs/~~Sec0105~~.pdf Sec 105.8] of the Standard Specifications.		The division of responsibility under which the engineer is responsible for control points (always set on permanently fixed objects) and the contractor for intermediate points (on forms or temporary objects) is established by [http://www.modot.org/business/standards_and_specs/SpecbookEPG.pdf#page=4 Sec 105.8] of the Standard Specifications.

	==760.4 Vertical Clearance==		==760.4 Vertical Clearance==

Smithk: Per CM, added listing of FAQs about Reporting of Changes to Bridge Clearance

2015-10-29T12:15:40Z

Per CM, added listing of FAQs about Reporting of Changes to Bridge Clearance

← Older revision		Revision as of 07:15, 29 October 2015
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	\|[[Media:760 Typical Computation for Haunch.pdf\|Typical Computation for Haunch]]		\|[[Media:760 Typical Computation for Haunch.pdf\|Typical Computation for Haunch]]
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			\|'''FAQ'''
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			\|[[media:760.4.2 FAQ.docx\|Reporting of Changes to Bridge Clearance FAQs]]
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	\|'''Video'''		\|'''Video'''
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	===760.4.2 Notification Requirements===		===760.4.2 Notification Requirements===
			{\|style="padding: 0.3em; margin-left:15px; border:2px solid #a9a9a9; text-align:center; font-size: 95%; background:#f5f5f5" width="260px" align="right"
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			\|[[media:760.4.2 FAQ.docx\|Reporting of Changes to Bridge Clearance FAQs]]
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	At least two weeks before any change in vertical clearance, district personnel should advise the Motor Carrier Services Permit Office by Email or letter of the projected change in clearance. The final vertical clearance should be measured in the field and reported as soon as possible after the vertical change is permanent. (See [[media:760.4.2 Bridge Clearance Report.docx\|Bridge Clearance Report Form]]).		At least two weeks before any change in vertical clearance, district personnel should advise the Motor Carrier Services Permit Office by Email or letter of the projected change in clearance. The final vertical clearance should be measured in the field and reported as soon as possible after the vertical change is permanent. (See [[media:760.4.2 Bridge Clearance Report.docx\|Bridge Clearance Report Form]]).