751.1 Preliminary Design - Revision history

Hoskir: /* 751.1.2.17 Preliminary Cost Estimate */ remove image fig 751.9.1 put there by mistake

2026-01-28T21:03:41Z

751.1.2.17 Preliminary Cost Estimate: remove image fig 751.9.1 put there by mistake

← Older revision		Revision as of 16:03, 28 January 2026
Line 413:		Line 413:

	===751.1.2.17 Preliminary Cost Estimate===		===751.1.2.17 Preliminary Cost Estimate===
	~~[[File:Fig 751.9.1.png]]~~

	'''Box Culverts –''' A new or replaced box culvert is exempt from seismic design unless crossing a known exposed fault. Submit [https://epg.modot.org/forms/general_files/BR/Request_for_Final_Soundings_for_Structures_Form.xlsx “Request for soil properties Form A”] to Geotech Section and design as a SDC A. If box culvert is crossing a known exposed fault then discuss with Structural Project Manager (SPM) for alternate option.		'''Box Culverts –''' A new or replaced box culvert is exempt from seismic design unless crossing a known exposed fault. Submit [https://epg.modot.org/forms/general_files/BR/Request_for_Final_Soundings_for_Structures_Form.xlsx “Request for soil properties Form A”] to Geotech Section and design as a SDC A. If box culvert is crossing a known exposed fault then discuss with Structural Project Manager (SPM) for alternate option.

Hoskir: /* 751.1.2.17 Preliminary Cost Estimate */ updated links to fig 751.9.1

2026-01-28T20:58:51Z

751.1.2.17 Preliminary Cost Estimate: updated links to fig 751.9.1

← Older revision		Revision as of 15:58, 28 January 2026
Line 413:		Line 413:

	===751.1.2.17 Preliminary Cost Estimate===		===751.1.2.17 Preliminary Cost Estimate===
	[[:File:~~fig_751~~.9.1.png]]		[[File:Fig 751.9.1.png]]

	'''Box Culverts –''' A new or replaced box culvert is exempt from seismic design unless crossing a known exposed fault. Submit [https://epg.modot.org/forms/general_files/BR/Request_for_Final_Soundings_for_Structures_Form.xlsx “Request for soil properties Form A”] to Geotech Section and design as a SDC A. If box culvert is crossing a known exposed fault then discuss with Structural Project Manager (SPM) for alternate option.		'''Box Culverts –''' A new or replaced box culvert is exempt from seismic design unless crossing a known exposed fault. Submit [https://epg.modot.org/forms/general_files/BR/Request_for_Final_Soundings_for_Structures_Form.xlsx “Request for soil properties Form A”] to Geotech Section and design as a SDC A. If box culvert is crossing a known exposed fault then discuss with Structural Project Manager (SPM) for alternate option.

	'''Bridges and Retaining Walls –''' For a new or replaced retaining wall or bridge, review [https://epg.modot.org/forms/general_files/BR/Bridge_Seismic_Planning_Flowchart.pdf Bridge Seismic Planning Flowchart], [https://epg.modot.org/forms/general_files/BR/Bridge_Seismic_Design_Flowchart.pdf Bridge Seismic Design Flowchart], [https://epg.modot.org/forms/general_files/BR/Preliminary_Seismic_Design_Map.pdf preliminary seismic design map] (or see EPG [[~~:File:fig_751~~.9.1~~.png~~\|Figure 751.9.1 Preliminary Seismic Design Map]] and [https://www.modot.org/media/47036 SEG 24-01] and following information.		'''Bridges and Retaining Walls –''' For a new or replaced retaining wall or bridge, review [https://epg.modot.org/forms/general_files/BR/Bridge_Seismic_Planning_Flowchart.pdf Bridge Seismic Planning Flowchart], [https://epg.modot.org/forms/general_files/BR/Bridge_Seismic_Design_Flowchart.pdf Bridge Seismic Design Flowchart], [https://epg.modot.org/forms/general_files/BR/Preliminary_Seismic_Design_Map.pdf preliminary seismic design map] (or see EPG [[751.9_Bridge_Seismic_Design#fig751.9.1\|Figure 751.9.1 Preliminary Seismic Design Map]] and [https://www.modot.org/media/47036 SEG 24-01] and following information.
	:* Seismic design of overpass should be considered when overpass bridge collapse would greatly impede emergency traffic for the main route. (i.e., No access ramps on a [https://epg.modot.org/forms/general_files/BR/Preliminary_Seismic_Design_Map.pdf major route or a 1st or 2nd priority earthquake emergency route]).		:* Seismic design of overpass should be considered when overpass bridge collapse would greatly impede emergency traffic for the main route. (i.e., No access ramps on a [https://epg.modot.org/forms/general_files/BR/Preliminary_Seismic_Design_Map.pdf major route or a 1st or 2nd priority earthquake emergency route]).
	:* For preliminary planning and cost estimate use the SDC values shown on [https://epg.modot.org/forms/general_files/BR/Preliminary_Seismic_Design_Map.pdf preliminary seismic design map]. SDC boundaries are shown for soil site class D.		:* For preliminary planning and cost estimate use the SDC values shown on [https://epg.modot.org/forms/general_files/BR/Preliminary_Seismic_Design_Map.pdf preliminary seismic design map]. SDC boundaries are shown for soil site class D.

Hoskir: /* 751.1.2.17 Preliminary Cost Estimate */ updated per RR 4148

2026-01-21T18:58:17Z

751.1.2.17 Preliminary Cost Estimate: updated per RR 4148

← Older revision		Revision as of 13:58, 21 January 2026
Line 413:		Line 413:

	===751.1.2.17 Preliminary Cost Estimate===		===751.1.2.17 Preliminary Cost Estimate===
			[[:File:fig_751.9.1.png]]
	'''Box Culverts –''' A new or replaced box culvert is exempt from seismic design unless crossing a known exposed fault. Submit [https://epg.modot.org/forms/general_files/BR/Request_for_Final_Soundings_for_Structures_Form.xlsx “Request for soil properties Form A”] to Geotech Section and design as a SDC A. If box culvert is crossing a known exposed fault then discuss with Structural Project Manager (SPM) for alternate option.		'''Box Culverts –''' A new or replaced box culvert is exempt from seismic design unless crossing a known exposed fault. Submit [https://epg.modot.org/forms/general_files/BR/Request_for_Final_Soundings_for_Structures_Form.xlsx “Request for soil properties Form A”] to Geotech Section and design as a SDC A. If box culvert is crossing a known exposed fault then discuss with Structural Project Manager (SPM) for alternate option.

	'''Bridges and Retaining Walls –''' For a new or replaced retaining wall or bridge, review [https://epg.modot.org/forms/general_files/BR/Bridge_Seismic_Planning_Flowchart.pdf Bridge Seismic Planning Flowchart], [https://epg.modot.org/forms/general_files/BR/Bridge_Seismic_Design_Flowchart.pdf Bridge Seismic Design Flowchart], [https://epg.modot.org/forms/general_files/BR/Preliminary_Seismic_Design_Map.pdf preliminary seismic design map] and following information.		'''Bridges and Retaining Walls –''' For a new or replaced retaining wall or bridge, review [https://epg.modot.org/forms/general_files/BR/Bridge_Seismic_Planning_Flowchart.pdf Bridge Seismic Planning Flowchart], [https://epg.modot.org/forms/general_files/BR/Bridge_Seismic_Design_Flowchart.pdf Bridge Seismic Design Flowchart], [https://epg.modot.org/forms/general_files/BR/Preliminary_Seismic_Design_Map.pdf preliminary seismic design map] (or see EPG [[:File:fig_751.9.1.png\|Figure 751.9.1 Preliminary Seismic Design Map]] and [https://www.modot.org/media/47036 SEG 24-01] and following information.
	:* Seismic design of overpass should be considered when overpass bridge collapse would greatly impede emergency traffic for the main route. (i.e., No access ramps on a [https://epg.modot.org/forms/general_files/BR/Preliminary_Seismic_Design_Map.pdf major route or a 1st or 2nd priority earthquake emergency route]).		:* Seismic design of overpass should be considered when overpass bridge collapse would greatly impede emergency traffic for the main route. (i.e., No access ramps on a [https://epg.modot.org/forms/general_files/BR/Preliminary_Seismic_Design_Map.pdf major route or a 1st or 2nd priority earthquake emergency route]).
	:* For preliminary planning and cost estimate use the SDC values shown on [https://epg.modot.org/forms/general_files/BR/Preliminary_Seismic_Design_Map.pdf preliminary seismic design map]. SDC boundaries are shown for soil site class D.		:* For preliminary planning and cost estimate use the SDC values shown on [https://epg.modot.org/forms/general_files/BR/Preliminary_Seismic_Design_Map.pdf preliminary seismic design map]. SDC boundaries are shown for soil site class D.

Hoskir: /* 751.1.2.9.2 Steel Girder Options */ updated per RR4071

2025-07-14T15:51:59Z

751.1.2.9.2 Steel Girder Options: updated per RR4071

← Older revision		Revision as of 10:51, 14 July 2025
Line 315:		Line 315:
	The final brown rust appearance could be an aesthetic concern. When determining the use of weathering steel, aesthetics and other concerns should be discussed by the Core Team members, with input from [https://modotgov.sharepoint.com/sites/br Bridge Division] and [https://modotgov.sharepoint.com/sites/mt Maintenance Division].		The final brown rust appearance could be an aesthetic concern. When determining the use of weathering steel, aesthetics and other concerns should be discussed by the Core Team members, with input from [https://modotgov.sharepoint.com/sites/br Bridge Division] and [https://modotgov.sharepoint.com/sites/mt Maintenance Division].

	If weathering steel cannot be used, the girders should be painted gray (Federal Standard #26373). If the district doesn’t want gray, they can choose brown (Federal Standard #30045). If the district or the local municipality wants a color other than gray or brown, they must meet the requirements of [[1045.5_Policy_on_Color_of_Structural_Steel_Paint\|EPG 1045.5 Policy on Color of Structural Steel Paint]]~~. System G paint is the preferred system on all steel plate girders~~. See [[751.6_General_Quantities#751.6.2.11_Structural_Steel_Protective_Coatings_.28Non-weathering Steel.29\|EPG 751.6.2.11]], [[751.6 General Quantities#751.6.2.12 Structural Steel Protective Coatings (Weathering Steel)\|EPG 751.6.2.12]] and [[751.14 Steel Superstructure#751.14.5.8 Protective Coating Requirements\|EPG 751.14.5.8]] for further guidance on paint systems.		If weathering steel cannot be used, the girders should be painted gray (Federal Standard #26373). If the district doesn’t want gray, they can choose brown (Federal Standard #30045). If the district or the local municipality wants a color other than gray or brown, they must meet the requirements of [[1045.5_Policy_on_Color_of_Structural_Steel_Paint\|EPG 1045.5 Policy on Color of Structural Steel Paint]]. See [[751.6_General_Quantities#751.6.2.11_Structural_Steel_Protective_Coatings_.28Non-weathering Steel.29\|EPG 751.6.2.11]], [[751.6 General Quantities#751.6.2.12 Structural Steel Protective Coatings (Weathering Steel)\|EPG 751.6.2.12]] and [[751.14 Steel Superstructure#751.14.5.8 Protective Coating Requirements\|EPG 751.14.5.8]] for further guidance on paint systems.

	===751.1.2.10 Longer Bridges===		===751.1.2.10 Longer Bridges===

Hoskir: /* 751.1.2.20 Substructure Type */ updated per RR4042

2025-05-27T19:45:44Z

751.1.2.20 Substructure Type: updated per RR4042

← Older revision		Revision as of 14:45, 27 May 2025
Line 752:		Line 752:

	The designer shall establish the limits of galvanized structural steel pile (i.e., HP pile and CIP pile). All exposed pile plus any required length below ground shall be galvanized. Based on required galvanized pile length determine and show Minimum Galvanized Penetration (Elevation) or Full Length on the Design Layout and on the plans.		The designer shall establish the limits of galvanized structural steel pile (i.e., HP pile and CIP pile). All exposed pile plus any required length below ground shall be galvanized. Based on required galvanized pile length determine and show Minimum Galvanized Penetration (Elevation) or Full Length on the Design Layout and on the plans.

			When glacial material or other hard material is identified in the geotechnical report discuss with SPM and consider galvanizing full length of pile to avoid the scenario where friction pile may potentially be cut-off once the geotechnical capacity is reached but the depth for galvanization is inadequate.

	<div id="Required Pile Length"></div>		<div id="Required Pile Length"></div>
	{\| border="1" class="wikitable" style="margin: 1em auto 1em auto"		{\| border="1" class="wikitable" style="margin: 1em auto 1em auto"

Hoskir: /* 751.1.1.2 Bridge Survey Processing and Bridge Numbering */

2025-03-17T13:13:37Z

751.1.1.2 Bridge Survey Processing and Bridge Numbering

← Older revision		Revision as of 08:13, 17 March 2025
Line 51:		Line 51:

	'''Removal of Existing Bridge Structures:'''		'''Removal of Existing Bridge Structures:'''
	: When a bridge structure is removed and not replaced by a new bridge structure or is removed under a separate contract, the suffix “-Rem” should be added to the latest bridge number (i.e., bridge number T0415 would become T0415-~~Remove~~ and bridge number K01651 would become K01651-Rem).		: When a bridge structure is removed and not replaced by a new bridge structure or is removed under a separate contract, the suffix “-Rem” should be added to the latest bridge number (i.e., bridge number T0415 would become T0415-Rem and bridge number K01651 would become K01651-Rem).

	'''Replacement Bridges with no Bridge Survey:'''		'''Replacement Bridges with no Bridge Survey:'''

Hoskir: /* 751.1.1 Overview */

2025-03-17T13:12:50Z

751.1.1 Overview

← Older revision		Revision as of 08:12, 17 March 2025
Line 51:		Line 51:

	'''Removal of Existing Bridge Structures:'''		'''Removal of Existing Bridge Structures:'''
	: When a bridge structure is removed and not replaced by a new bridge structure or is removed under a separate contract, the suffix “-Rem” should be added to the latest bridge number (i.e., bridge number T0415 would become T0415-Remove and bridge number K01651 would become K01651-~~Remove~~).		: When a bridge structure is removed and not replaced by a new bridge structure or is removed under a separate contract, the suffix “-Rem” should be added to the latest bridge number (i.e., bridge number T0415 would become T0415-Remove and bridge number K01651 would become K01651-Rem).

	'''Replacement Bridges with no Bridge Survey:'''		'''Replacement Bridges with no Bridge Survey:'''

Hoskir: /* 751.1.1.2 Bridge Survey Processing and Bridge Numbering */ updated text under Removal of Existing Bridge Structures

2025-03-17T13:07:48Z

751.1.1.2 Bridge Survey Processing and Bridge Numbering: updated text under Removal of Existing Bridge Structures

← Older revision		Revision as of 08:07, 17 March 2025
Line 51:		Line 51:

	'''Removal of Existing Bridge Structures:'''		'''Removal of Existing Bridge Structures:'''
	: When a bridge structure is removed and not replaced by a new bridge structure or is removed under a separate contract, the suffix “-~~Remove”~~ should be added to the latest bridge number (i.e., bridge number T0415 would become T0415-Remove and bridge number K01651 would become K01651-Remove).		: When a bridge structure is removed and not replaced by a new bridge structure or is removed under a separate contract, the suffix “-Rem” should be added to the latest bridge number (i.e., bridge number T0415 would become T0415-Remove and bridge number K01651 would become K01651-Remove).

	'''Replacement Bridges with no Bridge Survey:'''		'''Replacement Bridges with no Bridge Survey:'''

Hoskir: /* 751.1.1.2 Bridge Survey Processing and Bridge Numbering */ updated per RR4022 - Update to current practice and add new procedure for MMA crack filler jobs on bridges.

2025-03-06T19:20:22Z

751.1.1.2 Bridge Survey Processing and Bridge Numbering: updated per RR4022 - Update to current practice and add new procedure for MMA crack filler jobs on bridges.

Show changes

Hoskir: /* 751.1.2.29 Protection of Spill Slopes and Side Slopes */ updated per email

2025-02-13T20:26:14Z

751.1.2.29 Protection of Spill Slopes and Side Slopes: updated per email

← Older revision		Revision as of 15:26, 13 February 2025
Line 889:		Line 889:
	===751.1.2.29 Protection of Spill Slopes and Side Slopes===		===751.1.2.29 Protection of Spill Slopes and Side Slopes===

	The district shall be consulted for type of slope protection. Either Concrete Slope Protection or Rock Blanket can be used for grade separations and are Roadway Pay Items. On stream crossings, Rock Blanket is usually placed. The type and thickness of Rock Blanket is to be determined by the district based on the flow velocity from the [https://epg.modot.org/index.php?title=750.3_Bridges#750.3.1.9_Scour Scour] design flood frequency. This flow velocity is determined by the person doing the hydraulic calculations and should be placed on the Bridge Memorandum. Permanent erosion control geotextile is always required to be placed under rock blanket.		The district shall be consulted for type of slope protection. Either Concrete Slope Protection or Rock Blanket can be used for grade separations and are Roadway Pay Items. On stream crossings, Rock Blanket is usually placed. The type and thickness of Rock Blanket is to be determined by the district based on the flow velocity from the [https://epg.modot.org/index.php?title=750.3_Bridges#750.3.1.9_Scour Scour] design flood frequency. This flow velocity is determined by the person doing the hydraulic calculations and should be placed on the Bridge Memorandum. Permanent erosion control geotextile is always required to be placed under rock blanket and a separate pay item for Permanent Erosion Control Geotextile (sq. yds.) should be provided in accordance with Sec 611.30.

	When Rock Blanket is used, an elevation for the upper limit of this protection needs to be calculated. First, calculate the following two elevations:		When Rock Blanket is used, an elevation for the upper limit of this protection needs to be calculated. First, calculate the following two elevations: