903.17 Overhead Sign Mounting - Revision history

TaracksA at 17:38, 21 November 2025

2025-11-21T17:38:02Z

← Older revision		Revision as of 12:38, 21 November 2025
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	[[Category:903 Highway Signing\|903.17]]		[[Category:903 Highway Signing (MUTCD Part 2)\|903.17]]
	[[image:903.4.jpg\|right\|350px]]		[[image:903.4.jpg\|right\|350px]]
	=={{SpanID\|903.17.1}}903.17.1 Overhead Sign Installations ([https://mutcd.fhwa.dot.gov/ MUTCD] Section 2A.17)==		=={{SpanID\|903.17.1}}903.17.1 Overhead Sign Installations ([https://mutcd.fhwa.dot.gov/ MUTCD] Section 2A.17)==

HogsettC: /* 903.17.13 Structure Loading */

2025-11-21T13:59:16Z

903.17.13 Structure Loading

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	'''Standard.''' Bridge Division shall determine the frequency of inspection for all sign trusses and shall maintain the sign truss inventory.		'''Standard.''' Bridge Division shall determine the frequency of inspection for all sign trusses and shall maintain the sign truss inventory.

	==903.17.13 Structure Loading==		=={{SpanID\|903.17.13}}903.17.13 Structure Loading==
	'''Support.''' There is a maximum signage area allowed for each structure. For changes in signing call Central Office Highway Safety and Traffic for assistance and review.		'''Support.''' There is a maximum signage area allowed for each structure. For changes in signing call Central Office Highway Safety and Traffic for assistance and review.

HogsettC: /* 903.17.12 Overhead Sign and Truss Inspection/Inventory */

2025-11-21T13:58:54Z

903.17.12 Overhead Sign and Truss Inspection/Inventory

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	'''Support.''' The pole’s design height for overhead sign supports placed on elevated roadway fill is to include the height of the fill. Consult Bridge Division if the pole’s design height exceeds the values shown in the standard plans.		'''Support.''' The pole’s design height for overhead sign supports placed on elevated roadway fill is to include the height of the fill. Consult Bridge Division if the pole’s design height exceeds the values shown in the standard plans.

	==903.17.12 Overhead Sign and Truss Inspection/Inventory==		=={{SpanID\|903.17.12}}903.17.12 Overhead Sign and Truss Inspection/Inventory==
	'''Option.''' Sign truss inspection may be made by consultant as determined by [http://sp/sites/br/pages/default.aspx Bridge Division].		'''Option.''' Sign truss inspection may be made by consultant as determined by [http://sp/sites/br/pages/default.aspx Bridge Division].

HogsettC: /* 903.17.11 Sign Supports on Fill */

2025-11-21T13:58:32Z

903.17.11 Sign Supports on Fill

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	'''Support.''' Special design details are required on spans greater than 160 ft. and other situations not covered by the Standard Plans. A truss cross-section is submitted to Bridge Division as required for any new truss. The district receives recommendations from Bridge for special foundation, truss, and column information. Design of non-standard structures should be in accordance with the latest version and latest interims of the ''AASHTO Standard Specifications for Structural Supports for Highway Signs, Luminaires and Traffic Signals''. Unless otherwise noted, the district is responsible for including the information in the final plans.		'''Support.''' Special design details are required on spans greater than 160 ft. and other situations not covered by the Standard Plans. A truss cross-section is submitted to Bridge Division as required for any new truss. The district receives recommendations from Bridge for special foundation, truss, and column information. Design of non-standard structures should be in accordance with the latest version and latest interims of the ''AASHTO Standard Specifications for Structural Supports for Highway Signs, Luminaires and Traffic Signals''. Unless otherwise noted, the district is responsible for including the information in the final plans.

	==903.17.11 Sign Supports on Fill==		=={{SpanID\|903.17.11}}903.17.11 Sign Supports on Fill==
	'''Support.''' The pole’s design height for overhead sign supports placed on elevated roadway fill is to include the height of the fill. Consult Bridge Division if the pole’s design height exceeds the values shown in the standard plans.		'''Support.''' The pole’s design height for overhead sign supports placed on elevated roadway fill is to include the height of the fill. Consult Bridge Division if the pole’s design height exceeds the values shown in the standard plans.

	==903.17.12 Overhead Sign and Truss Inspection/Inventory==		==903.17.12 Overhead Sign and Truss Inspection/Inventory==

HogsettC: /* 903.17.10 Non-Standard Sign Support Structures */

2025-11-21T13:58:06Z

903.17.10 Non-Standard Sign Support Structures

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	:'''Existing Bridge (no other bridge work):''' When retrofitting an existing bridge with a new sign support structure, the preferred location and existing bridge number is submitted to the consultant, along with the same data as required for a new bridge-mounted sign support structure. The consultant is responsible for design of pedestals and structure above the pedestal for bridge-mounted structures and all related bid items.		:'''Existing Bridge (no other bridge work):''' When retrofitting an existing bridge with a new sign support structure, the preferred location and existing bridge number is submitted to the consultant, along with the same data as required for a new bridge-mounted sign support structure. The consultant is responsible for design of pedestals and structure above the pedestal for bridge-mounted structures and all related bid items.

	==903.17.10 Non-Standard Sign Support Structures==		=={{SpanID\|903.17.10}}903.17.10 Non-Standard Sign Support Structures==

	'''Support.''' Special design details are required on spans greater than 160 ft. and other situations not covered by the Standard Plans. A truss cross-section is submitted to Bridge Division as required for any new truss. The district receives recommendations from Bridge for special foundation, truss, and column information. Design of non-standard structures should be in accordance with the latest version and latest interims of the ''AASHTO Standard Specifications for Structural Supports for Highway Signs, Luminaires and Traffic Signals''. Unless otherwise noted, the district is responsible for including the information in the final plans.		'''Support.''' Special design details are required on spans greater than 160 ft. and other situations not covered by the Standard Plans. A truss cross-section is submitted to Bridge Division as required for any new truss. The district receives recommendations from Bridge for special foundation, truss, and column information. Design of non-standard structures should be in accordance with the latest version and latest interims of the ''AASHTO Standard Specifications for Structural Supports for Highway Signs, Luminaires and Traffic Signals''. Unless otherwise noted, the district is responsible for including the information in the final plans.

HogsettC: /* 903.17.9 Bridge-Mounted Structure Designs */

2025-11-21T13:57:43Z

903.17.9 Bridge-Mounted Structure Designs

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	The sign and sign brackets are designed to provide a clear distance of 2 ft. from the outside edge of the bridge to the edge of the sign. The sign has a maximum skew angle of 5 degrees to the roadway for which it is provided. The sign bracket is designed so the sign is visible to traffic at least 600 ft. ahead of the installation.		The sign and sign brackets are designed to provide a clear distance of 2 ft. from the outside edge of the bridge to the edge of the sign. The sign has a maximum skew angle of 5 degrees to the roadway for which it is provided. The sign bracket is designed so the sign is visible to traffic at least 600 ft. ahead of the installation.

	==903.17.9 Bridge-Mounted Structure Designs==		=={{SpanID\|903.17.9}}903.17.9 Bridge-Mounted Structure Designs==

	'''Support.''' Bridges are utilized wherever possible to mount sign support structures. This concept removes a potential roadside obstacle and any need for guardrail or concrete traffic barrier and is generally more economical.		'''Support.''' Bridges are utilized wherever possible to mount sign support structures. This concept removes a potential roadside obstacle and any need for guardrail or concrete traffic barrier and is generally more economical.
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	:'''Existing Bridge (with other bridge work):''' When retrofitting an existing bridge with a new sign support structure, the preferred location and existing bridge number is submitted to Bridge Division, along with the same data as required for a new bridge-mounted sign support structure. The incorporation of bid items is similar to new bridge-mounted sign support structures.		:'''Existing Bridge (with other bridge work):''' When retrofitting an existing bridge with a new sign support structure, the preferred location and existing bridge number is submitted to Bridge Division, along with the same data as required for a new bridge-mounted sign support structure. The incorporation of bid items is similar to new bridge-mounted sign support structures.

	:'''Existing Bridge (no other bridge work):''' When retrofitting an existing bridge with a new sign support structure, the preferred location and existing bridge number is submitted to the consultant, along with the same data as required for a new bridge-mounted sign support structure. The consultant is responsible for design of pedestals and structure above the pedestal for bridge-mounted structures and all related bid items.		:'''Existing Bridge (no other bridge work):''' When retrofitting an existing bridge with a new sign support structure, the preferred location and existing bridge number is submitted to the consultant, along with the same data as required for a new bridge-mounted sign support structure. The consultant is responsible for design of pedestals and structure above the pedestal for bridge-mounted structures and all related bid items.

	==903.17.10 Non-Standard Sign Support Structures==		==903.17.10 Non-Standard Sign Support Structures==

HogsettC: /* 903.17.8 Bridge-Mounted Signs */

2025-11-21T13:57:21Z

903.17.8 Bridge-Mounted Signs

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	[[#fig903.17.1.1\|Figure 903.17.1.1]] shows an example of a one-arm span tubular structure cross-section. Other types of tubular steel structure designs require similar information as shown on this figure.		[[#fig903.17.1.1\|Figure 903.17.1.1]] shows an example of a one-arm span tubular structure cross-section. Other types of tubular steel structure designs require similar information as shown on this figure.

	==903.17.8 Bridge-Mounted Signs==		=={{SpanID\|903.17.8}}903.17.8 Bridge-Mounted Signs==

	'''Support.''' Bridges are utilized wherever possible to mount overhead signs. This concept removes a potential roadside obstacle and any need for guardrail or concrete traffic barrier and is generally more economical.		'''Support.''' Bridges are utilized wherever possible to mount overhead signs. This concept removes a potential roadside obstacle and any need for guardrail or concrete traffic barrier and is generally more economical.
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	:'''Existing Bridge (no other bridge work):''' When retrofitting an existing bridge with a new bracket, the consultant designs the bracket and submits the plan to the district for inclusion into the roadway plans. For tracking purposes, the Bridge Survey Processor is contacted so a bridge rehab number can be assigned. A copy of the final sign attachment sheets is sent to the Bridge Survey Processor for incorporation with the existing bridge plans.		:'''Existing Bridge (no other bridge work):''' When retrofitting an existing bridge with a new bracket, the consultant designs the bracket and submits the plan to the district for inclusion into the roadway plans. For tracking purposes, the Bridge Survey Processor is contacted so a bridge rehab number can be assigned. A copy of the final sign attachment sheets is sent to the Bridge Survey Processor for incorporation with the existing bridge plans.

	The sign and sign brackets are designed to provide a clear distance of 2 ft. from the outside edge of the bridge to the edge of the sign. The sign has a maximum skew angle of 5 degrees to the roadway for which it is provided. The sign bracket is designed so the sign is visible to traffic at least 600 ft. ahead of the installation.		The sign and sign brackets are designed to provide a clear distance of 2 ft. from the outside edge of the bridge to the edge of the sign. The sign has a maximum skew angle of 5 degrees to the roadway for which it is provided. The sign bracket is designed so the sign is visible to traffic at least 600 ft. ahead of the installation.

	==903.17.9 Bridge-Mounted Structure Designs==		==903.17.9 Bridge-Mounted Structure Designs==

HogsettC: /* 903.17.7 Tubular Steel Sign Supports */

2025-11-21T13:56:53Z

903.17.7 Tubular Steel Sign Supports

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	[[media:903.4.6.3.pdf\|Examples of cross-sections for cantilever, butterfly]], and [[media:903.3.4.4.pdf\|span box trusses]] are available. Combination span-cantilever truss cross-sections require similar information.		[[media:903.4.6.3.pdf\|Examples of cross-sections for cantilever, butterfly]], and [[media:903.3.4.4.pdf\|span box trusses]] are available. Combination span-cantilever truss cross-sections require similar information.

	==903.17.7 Tubular Steel Sign Supports==		=={{SpanID\|903.17.7}}903.17.7 Tubular Steel Sign Supports==
	'''Support.''' Tubular steel span, cantilever and butterfly sign supports are shown on [https://www.modot.org/standard-plans-section-900 Standard Plans 903.05, 903.06, 903.07 and 903.08]. Details necessary to complete [https://www.modot.org/media/16707 Form D-34] are shown on the standard plans. These structures have limiting design factors including sign height, total sign area, and sign spread, as noted on each drawing. When any one of these limits is exceeded, box type trusses are used.		'''Support.''' Tubular steel span, cantilever and butterfly sign supports are shown on [https://www.modot.org/standard-plans-section-900 Standard Plans 903.05, 903.06, 903.07 and 903.08]. Details necessary to complete [https://www.modot.org/media/16707 Form D-34] are shown on the standard plans. These structures have limiting design factors including sign height, total sign area, and sign spread, as noted on each drawing. When any one of these limits is exceeded, box type trusses are used.

HogsettC: /* 903.17.6 Span, Cantilever and Butterfly Box Trusses */

2025-11-21T13:56:25Z

903.17.6 Span, Cantilever and Butterfly Box Trusses

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	Consideration may be given to placing guardrail at the edge of the clear zone to protect traffic from pedestals placed outside the clear zone.		Consideration may be given to placing guardrail at the edge of the clear zone to protect traffic from pedestals placed outside the clear zone.

	==903.17.6 Span, Cantilever and Butterfly Box Trusses==		=={{SpanID\|903.17.6}}903.17.6 Span, Cantilever and Butterfly Box Trusses==

	'''Support.''' Aluminum and steel span, combination span-cantilever, butterfly and cantilever box trusses are shown on [https://www.modot.org/media/16927 Standard Plans 903.10], [https://www.modot.org/media/16928 903.12] and [https://www.modot.org/media/16929 903.60]. These types are used when the required span exceeds the 90 ft. maximum span of standard tubular supports, or when sign height, sign design area, or sign spread exceeds the limits of tubular support designs. Necessary information to complete truss data sheets for overhead trusses include:		'''Support.''' Aluminum and steel span, combination span-cantilever, butterfly and cantilever box trusses are shown on [https://www.modot.org/media/16927 Standard Plans 903.10], [https://www.modot.org/media/16928 903.12] and [https://www.modot.org/media/16929 903.60]. These types are used when the required span exceeds the 90 ft. maximum span of standard tubular supports, or when sign height, sign design area, or sign spread exceeds the limits of tubular support designs. Necessary information to complete truss data sheets for overhead trusses include:

HogsettC: /* 903.17.5 Guardrail */

2025-11-21T13:56:01Z

903.17.5 Guardrail

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	'''Support.''' Bridge-mounted signs are no lower than the bridge, or 17 ft. 6 in., whichever clearance is lower.		'''Support.''' Bridge-mounted signs are no lower than the bridge, or 17 ft. 6 in., whichever clearance is lower.

	==903.17.5 Guardrail==		=={{SpanID\|903.17.5}}903.17.5 Guardrail==

	'''Support.''' Type A guardrail designed according to the standard plans and the AASHTO Roadside Design Guide is used to shield traffic from structure foundations. Type E guardrail is used only when necessary for areas with limited horizontal clearance, and installed within the guidelines as shown in the [https://www.modot.org/standard-plans-section-900 standard plans]. Structures are designed to eliminate the need for Type E guardrail.		'''Support.''' Type A guardrail designed according to the standard plans and the AASHTO Roadside Design Guide is used to shield traffic from structure foundations. Type E guardrail is used only when necessary for areas with limited horizontal clearance, and installed within the guidelines as shown in the [https://www.modot.org/standard-plans-section-900 standard plans]. Structures are designed to eliminate the need for Type E guardrail.

← Older revision		Revision as of 12:38, 21 November 2025
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	[[Category:903 Highway Signing\|903.17]]		[[Category:903 Highway Signing (MUTCD Part 2)\|903.17]]
	[[image:903.4.jpg\|right\|350px]]		[[image:903.4.jpg\|right\|350px]]
	=={{SpanID\|903.17.1}}903.17.1 Overhead Sign Installations ([https://mutcd.fhwa.dot.gov/ MUTCD] Section 2A.17)==		=={{SpanID\|903.17.1}}903.17.1 Overhead Sign Installations ([https://mutcd.fhwa.dot.gov/ MUTCD] Section 2A.17)==