751.12 Barriers, Railings, Curbs and Fences - Revision history

Hoskir: /* 751.12.4 Chain Link Fence */ updated per RR3887

2024-07-19T17:42:19Z

751.12.4 Chain Link Fence: updated per RR3887

@@ Line 307: / Line 307: @@
 Wind load for chain link or metal fabric fence: GREATER OF 0.015 ksf acting normal to the entire surface per LRFD 13.8.2 OR 0.11 x entire surface x calculated wind pressure (11% is effective surface area per MoDOT practice).
+<center>
+{| class="wikitable" border="1" style="text-align:center"
-{|border="0" cellpadding="5" cellspacing="1" align="center" style="text-align:center"
+|+
+| style="background:#BEBEBE" width="300" |'''[https://www.modot.org/bridge-standard-drawings Bridge Standard Drawings]'''
 |-
-!colspan="2"|Superstructure Near Steps
+| (Fences-FEN)
 |}
 ==751.12.5 Decorative Pedestrian Fence==

Hoskir: /* 751.12.5.1 Design */ updated link to bridge std drawings

2024-06-17T20:15:59Z

751.12.5.1 Design: updated link to bridge std drawings

← Older revision		Revision as of 15:15, 17 June 2024
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	:*Decorative Pedestrian fences are limited to minimum 3’-6” height from top of deck or sidewalk and maximum of 8’-0” post height.		:*Decorative Pedestrian fences are limited to minimum 3’-6” height from top of deck or sidewalk and maximum of 8’-0” post height.
	:*Decorative Pedestrian fences are limited to maximum 8’-0” post to post spacing.		:*Decorative Pedestrian fences are limited to maximum 8’-0” post to post spacing.
	:*The base plate footprint shall match that provided in the [https://www.modot.org/~~fences~~-~~fen~~ Bridge Standard Drawings]. A flat base plate is provided for decorative pedestrian fences located on Type H barriers and pedestrian curbs. Bent base plates are required for installations on Type B and Type D barriers due to the limited footprint available.		:*The base plate footprint shall match that provided in the [https://www.modot.org/bridge-standard-drawings Bridge Standard Drawings]. A flat base plate is provided for decorative pedestrian fences located on Type H barriers and pedestrian curbs. Bent base plates are required for installations on Type B and Type D barriers due to the limited footprint available.

Hoskir: /* 751.12.5 Decorative Pedestrian Fence */ updated per RR3848

2024-05-09T18:21:49Z

751.12.5 Decorative Pedestrian Fence: updated per RR3848

@@ Line 429: / Line 429: @@
 :*Decorative Pedestrian fences are limited to maximum 8’-0” post to post spacing.
 :*The base plate footprint shall match that provided in the [https://www.modot.org/fences-fen Bridge Standard Drawings].  A flat base plate is provided for decorative pedestrian fences located on Type H barriers and pedestrian curbs.  Bent base plates are required for installations on Type B and Type D barriers due to the limited footprint available.
 [[Category:751 LRFD Bridge Design Guidelines]]

Hoskir: /* 751.12.2 Two Tube Rail (Top Mounted) TL-4 (NCHRP 350) */ updated per RR3848

2024-05-09T15:26:29Z

751.12.2 Two Tube Rail (Top Mounted) TL-4 (NCHRP 350): updated per RR3848

← Older revision		Revision as of 10:26, 9 May 2024
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	[[image:751.12.1.6.1 2021.jpg\|center\|375px]]		[[image:751.12.1.6.1 2021.jpg\|center\|375px]]

	==751.12.2 Two Tube Rail (Top Mounted~~) TL-4 (NCHRP 350~~)==		==751.12.2 Two Tube Rail (Top Mounted)==

	'''~~Guidance~~'''		'''38-inch Two Tube Rail'''

	Consult the Structural Project Manager prior to use due to cost.		Consult the Structural Project Manager prior to use due to cost.
	:* Meets TL-4 (NCHRP 350)		:* Meets TL-4 (MASH 2016)
	:* Typically used on redecks, widenings, and railing or full-length cantilever replacements.		:* May be used for decks not less than 6-1/2 inches.
	:* May be used on adjacent box beam bridges where reinforcement is embedded in the beam.		:* Uses an 18-inch wide curb. If the abutment uses turned-back wings they must be 18-inches thick.
	:* Acceptable for use when roadway width or site distance is a concern.		:* Acceptable for use when site distance is a concern.
	:* See [[751.1 Preliminary Design#751.1.3.4 Barrier or Railing Type, Height and Guidelines for Curb Blockouts\|EPG 751.1.3.4 Barrier or Railing Type, Height and Guidelines for Curb Blockouts]] for additional requirements for design speed and AADT.		:* Requires the 38-inch Two Tube Rail Transition for the bridge approaches. See [https://www.modot.org/standard-plans-section-600 STD. Plan 606.61].
	:* Curb is intrinsic to TL rating and shall be used. Curb shall be used to prevent drainage over deck.
			'''32-inch Two Tube Rail '''

			Consult the Structural Project Manager prior to use due to cost.
			:* Meets TL-4 (NCHRP 350)
			:* Typically used on redecks, widenings, and railing or full-length cantilever replacements where the 38-inch Two Tube Rail is not practical.
			:* May be used on adjacent box beam bridges where reinforcement is embedded in the beam.
			:* Acceptable for use when roadway width or site distance is a concern.
			:* See [[751.1 Preliminary Design#751.1.3.4 Barrier or Railing Type, Height and Guidelines for Curb Blockouts\|EPG 751.1.3.4 Barrier or Railing Type, Height and Guidelines for Curb Blockouts]] for additional requirements for design speed and AADT.
			:* Curb is intrinsic to TL rating and shall be used. Curb shall be used to prevent drainage over deck.
			:* Requires a Bridge Anchor Section ([https://www.modot.org/missouri-standard-plans-highway-construction STD. Plan 606.22]) for bridge approaches minus the bearing and connector plates.

	'''Details'''		'''Details'''
	~~<center>~~
	{\| 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"
	\|+		\|+

Hoskir: updated 751.12.1.3-6 per RR3851

2024-03-21T17:00:43Z

updated 751.12.1.3-6 per RR3851

Show changes

Hoskir: /* 751.12.1.2.7 Details of Mounting Light Poles on Safety Barrier Curbs */ updated per RR3803

2024-01-23T00:15:24Z

751.12.1.2.7 Details of Mounting Light Poles on Safety Barrier Curbs: updated per RR3803

← Older revision		Revision as of 19:15, 22 January 2024
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	====751.12.1.2.7 Details of Mounting Light Poles on Safety Barrier Curbs====		====751.12.1.2.7 Details of Mounting Light Poles on Safety Barrier Curbs====
	[[image:751.12.2.~~7.1 2020~~.jpg\|center\|550px]]		[[image:751.12.1.2.7_01_11-13-23.jpg\|center\|550px]]
	[[image:751.12.2.~~7.2 2020~~.jpg\|center\|625px]]		[[image:751.12.1.2.7_02_11-13-23.jpg\|center\|625px]]

	Anchor bolts and nuts shall be in accordance with ASTM ~~A449~~. Anchor bolts, nuts and washers shall be galvanized ~~in accordance with AASHTO M 232 (ASTM A153)~~, ~~Class C~~.		Anchor bolts and nuts shall be in accordance with ASTM F1554 Grade 55. Anchor bolts, nuts and washers shall be fully galvanized, See [[751.50_Standard_Detailing_Notes#H4._Conduit_System\|751.50.H4.2.2]] for additional information.

	'''Note to Detailer:''' Extend slab transverse steel to edge of slab in blister region often shown with an additional detail with the slab details.		'''Note to Detailer:''' Extend slab transverse steel to edge of slab in blister region often shown with an additional detail with the slab details.

Hoskir: /* 751.12.4 Chain Link Fence */ updated per RR3732

2023-08-22T13:18:20Z

751.12.4 Chain Link Fence: updated per RR3732

← Older revision		Revision as of 08:18, 22 August 2023
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	\|}		\|}

			==751.12.5 Decorative Pedestrian Fence==

			===751.12.5.1 Design===

			Decorative pedestrian fencing shall not be used without approval of the core team. Design of Decorative Pedestrian Fence is completed by consultant or contractor in accordance with LRFD 13. [https://www.modot.org/bridge-pre-qualified-products-list Bridge Pre-Qualified Products List] contains a listing of decorative pedestrian fence manufacturers which have been approved for use.

			General Guidelines
			:*Decorative Pedestrian fences are limited to minimum 3’-6” height from top of deck or sidewalk and maximum of 8’-0” post height.
			:*Decorative Pedestrian fences are limited to maximum 8’-0” post to post spacing.
			:*The base plate footprint shall match that provided in the [https://www.modot.org/fences-fen Bridge Standard Drawings]. A flat base plate is provided for decorative pedestrian fences located on Type H barriers and pedestrian curbs. Bent base plates are required for installations on Type B and Type D barriers due to the limited footprint available.


	[[Category:751 LRFD Bridge Design Guidelines]]		[[Category:751 LRFD Bridge Design Guidelines]]

Hoskir: updated 751.12.1.3 from MASH to MASH 2016 in 2 places

2022-09-26T17:45:59Z

updated 751.12.1.3 from MASH to MASH 2016 in 2 places

← Older revision		Revision as of 12:45, 26 September 2022
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	===751.12.1.3 Type D and H (42ʺ and 32ʺ single sloped railing)===		===751.12.1.3 Type D and H (42ʺ and 32ʺ single sloped railing)===
	The 42-inch single sloped Type D barrier shall be used for railing on all new or replacement bridge projects except where sight distance is a concern. Type D meets the height requirements for both MASH TL-4 (36ʺ) and Occupational Safety and Health Administration’s OSHA (42ʺ). Type D barrier has been reviewed by the Midwest Roadside Safety Facility (MwRSF) and is compliant with MASH 2016 TL-4. This assessment is applicable for continuous and discontinuous sections of the barrier. Type D barrier shall be used on all redecks and rehabs where the full length of barrier is being replaced with exceptions as outlined in [[751.1 Preliminary Design#751.1.3.4 Barrier or Railing Type, Height and Guidelines for Curb Blockouts\|EPG 751.1.3.4 Barrier or Railing Type, Height and Guidelines for Curb Blockouts]]. The Type D barrier dimensions shall not be adjusted for inclusion of a wearing surface.		The 42-inch single sloped Type D barrier shall be used for railing on all new or replacement bridge projects except where sight distance is a concern. Type D meets the height requirements for both MASH 2016 TL-4 (36ʺ) and Occupational Safety and Health Administration’s OSHA (42ʺ). Type D barrier has been reviewed by the Midwest Roadside Safety Facility (MwRSF) and is compliant with MASH 2016 TL-4. This assessment is applicable for continuous and discontinuous sections of the barrier. Type D barrier shall be used on all redecks and rehabs where the full length of barrier is being replaced with exceptions as outlined in [[751.1 Preliminary Design#751.1.3.4 Barrier or Railing Type, Height and Guidelines for Curb Blockouts\|EPG 751.1.3.4 Barrier or Railing Type, Height and Guidelines for Curb Blockouts]]. The Type D barrier dimensions shall not be adjusted for inclusion of a wearing surface.

	The 32-inch single sloped Type H barrier shall be used for railing, upon approval of the SPM or SLE, on all new or replacement bridge projects where sight distance concerns prohibit the use of Type D. Type H has the same front face slope as Type D. The minimum height for MASH TL-3 is 30 inches so there are minimal concerns with Type H for future overlays. Type H barrier has been reviewed by the Midwest Roadside Safety Facility (MwRSF) and is compliant with MASH 2016 TL-3. This assessment is applicable for continuous and discontinuous sections of the barrier. When a wearing surface is applied with the newly constructed Type H barrier, a pedestal is recommended to keep the holes for the guardrail attachment in the same location with respect to the top of the barrier.		The 32-inch single sloped Type H barrier shall be used for railing, upon approval of the SPM or SLE, on all new or replacement bridge projects where sight distance concerns prohibit the use of Type D. Type H has the same front face slope as Type D. The minimum height for MASH 2016 TL-3 is 30 inches so there are minimal concerns with Type H for future overlays. Type H barrier has been reviewed by the Midwest Roadside Safety Facility (MwRSF) and is compliant with MASH 2016 TL-3. This assessment is applicable for continuous and discontinuous sections of the barrier. When a wearing surface is applied with the newly constructed Type H barrier, a pedestal is recommended to keep the holes for the guardrail attachment in the same location with respect to the top of the barrier.

	====751.12.1.3.1 Typical Section====		====751.12.1.3.1 Typical Section====

Smithk: Per BR, aligned bridge barrier and railing guidance between EPG 751.1 and 751.12.

2022-02-14T19:08:53Z

Per BR, aligned bridge barrier and railing guidance between EPG 751.1 and 751.12.

← Older revision		Revision as of 14:08, 14 February 2022
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	===751.12.1.3 Type D and H (42ʺ and 32ʺ single sloped railing)===		===751.12.1.3 Type D and H (42ʺ and 32ʺ single sloped railing)===
	The 42-inch single sloped Type D barrier shall be used for railing on all new or replacement bridge projects except where sight distance is a concern. Type D meets the height requirements for both MASH TL-4 (36ʺ) and Occupational Safety and Health Administration’s OSHA (42ʺ). Type D barrier has been reviewed by the Midwest Roadside Safety Facility (MwRSF) and is compliant with MASH 2016 TL-4. This assessment is applicable for continuous and discontinuous sections of the barrier. Type D barrier shall be used on all redecks and rehabs where the full length of barrier is being replaced with exceptions for ~~the following:~~ 1~~) sight distance concerns~~, ~~2) rating concerns where the weight of the barrier prohibits its use or causes impractical restrictions or costs~~ for ~~the project~~. The Type D barrier dimensions shall not be adjusted for inclusion of a wearing surface.		The 42-inch single sloped Type D barrier shall be used for railing on all new or replacement bridge projects except where sight distance is a concern. Type D meets the height requirements for both MASH TL-4 (36ʺ) and Occupational Safety and Health Administration’s OSHA (42ʺ). Type D barrier has been reviewed by the Midwest Roadside Safety Facility (MwRSF) and is compliant with MASH 2016 TL-4. This assessment is applicable for continuous and discontinuous sections of the barrier. Type D barrier shall be used on all redecks and rehabs where the full length of barrier is being replaced with exceptions as outlined in [[751.1 Preliminary Design#751.1.3.4 Barrier or Railing Type, Height and Guidelines for Curb Blockouts\|EPG 751.1.3.4 Barrier or Railing Type, Height and Guidelines for Curb Blockouts]]. The Type D barrier dimensions shall not be adjusted for inclusion of a wearing surface.

	The 32-inch single sloped Type H barrier shall be used for railing, upon approval of the SPM or SLE, on all new or replacement bridge projects where sight distance concerns prohibit the use of Type D. Type H has the same front face slope as Type D. The minimum height for MASH TL-3 is 30 inches so there are minimal concerns with Type H for future overlays~~. The TL-3 height requirement has been updated since the release of SEG 20-001~~. Type H barrier has been reviewed by the Midwest Roadside Safety Facility (MwRSF) and is compliant with MASH 2016 TL-3. This assessment is applicable for continuous and discontinuous sections of the barrier. When a wearing surface is applied with the newly constructed Type H barrier, a pedestal is recommended to keep the holes for the guardrail attachment in the same location with respect to the top of the barrier.		The 32-inch single sloped Type H barrier shall be used for railing, upon approval of the SPM or SLE, on all new or replacement bridge projects where sight distance concerns prohibit the use of Type D. Type H has the same front face slope as Type D. The minimum height for MASH TL-3 is 30 inches so there are minimal concerns with Type H for future overlays. Type H barrier has been reviewed by the Midwest Roadside Safety Facility (MwRSF) and is compliant with MASH 2016 TL-3. This assessment is applicable for continuous and discontinuous sections of the barrier. When a wearing surface is applied with the newly constructed Type H barrier, a pedestal is recommended to keep the holes for the guardrail attachment in the same location with respect to the top of the barrier.

	====751.12.1.3.1 Typical Section====		====751.12.1.3.1 Typical Section====
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	'''Guidance'''		'''Guidance'''

			Consult the Structural Project Manager prior to use due to cost.
	:* Meets TL-4 (NCHRP 350)		:* Meets TL-4 (NCHRP 350)
	:* Typically used on ~~spread box beam bridges~~.		:* Typically used on redecks, widenings, and railing or full-length cantilever replacements.
	:* May be used on adjacent box beam bridges where reinforcement is embedded in the beam.		:* May be used on adjacent box beam bridges where reinforcement is embedded in the beam.
	~~:* Use only in certain applications because of cost. Consult the Structural Project Manager.~~
	:* Acceptable for use when roadway width or site distance is a concern.		:* Acceptable for use when roadway width or site distance is a concern.
			:* See [[751.1 Preliminary Design#751.1.3.4 Barrier or Railing Type, Height and Guidelines for Curb Blockouts\|EPG 751.1.3.4 Barrier or Railing Type, Height and Guidelines for Curb Blockouts]] for additional requirements for design speed and AADT.
	:* Curb is intrinsic to TL rating and shall be used. Curb shall be used to prevent drainage over deck.		:* Curb is intrinsic to TL rating and shall be used. Curb shall be used to prevent drainage over deck.

Smithk: /* 751.12.1.3.2 Typical Section Reinforcement */ Per BR, minor correction to Type D Typical Section diagram

2021-10-20T18:30:32Z

751.12.1.3.2 Typical Section Reinforcement: Per BR, minor correction to Type D Typical Section diagram

← Older revision		Revision as of 13:30, 20 October 2021
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	All values may be used with both 2.0% and 3/16 inch-per-foot cross slopes.		All values may be used with both 2.0% and 3/16 inch-per-foot cross slopes.
	[[image:751.12.1.3.2 2021.jpg\|center\|750px]]		[[image:751.12.1.3.2 Oct 2021.jpg\|center\|750px]]

	====751.12.1.3.3 End of Barrier Reinforcement====		====751.12.1.3.3 End of Barrier Reinforcement====