Category:712 Structural Steel Construction - Revision history

Hoskir: /* 712.1.4.1.3 Shear Connector Welding */ updated per RR4179

2026-05-06T14:24:43Z

712.1.4.1.3 Shear Connector Welding: updated per RR4179

← Older revision		Revision as of 09:24, 6 May 2026
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	=====712.1.4.1.3 Shear Connector Welding=====		=====712.1.4.1.3 Shear Connector Welding=====
			Current practices by the contractor may utilize the installation of shear connectors by field personnel. Most shear connector welding is completed by an automated welding process. AWS does not have a qualification procedure established in QC7. Instead, welders shall be qualified in accordance with AWS D1.5: 2025, Bridge Welding Code, Clause 9.7 by MoDOT field personnel. Shear connector welders shall be qualified by conducting a preproduction test. This test involves the welder welding two shear connectors to a test plate or to the production plate. The test specimens shall be visually inspected to ensure a full 360° weld. After the welds have cooled, the shear connectors shall then be bent to an angle of approximately 30° from the original axis by either striking with a hammer or placing a pipe over the shear connector and then bending. If the shear connector does not exhibit a complete weld or a failure occurs in the weld of either shear connector, the welder shall adjust the automatic welding machine and retest on a separate weld test plate. The welder may not retest on the actual production plate.
	Current practices by the contractor may utilize the installation of shear connectors by field personnel. Most shear connector welding is completed by an automated welding process. AWS does not have a qualification procedure established in QC7. Instead, welders shall be qualified in accordance with ~~2002~~ AWS Bridge Welding Code ~~D1.5~~ Clause 7.7 by MoDOT field personnel. Shear connector welders shall be qualified by conducting a preproduction test. This test involves the welder welding two shear connectors to a test plate or to the production plate. The test specimens shall be visually inspected to ensure a full 360° weld. After the welds have cooled, the shear connectors shall then be bent to an angle of approximately 30° from the original axis by either striking with a hammer or placing a pipe over the shear connector and then bending. If the shear connector does not exhibit a complete weld or a failure occurs in the weld of either shear connector, the welder shall adjust the automatic welding machine and retest on a separate weld test plate. The welder may not retest on the actual production plate.

	Before shear connector production welding in the field begins with a particular welder set-up, a specific shear connector size or type, and at the beginning of production for a particular shift or day, a preproduction test shall be conducted. The preproduction test shall be conducted on the first two shear connectors welded to the production plate or may be conducted on a separate test plate of the same thickness (+/- 25%). The acceptance method is the same as given earlier for the welder test.		Before shear connector production welding in the field begins with a particular welder set-up, a specific shear connector size or type, and at the beginning of production for a particular shift or day, a preproduction test shall be conducted. The preproduction test shall be conducted on the first two shear connectors welded to the production plate or may be conducted on a separate test plate of the same thickness (+/- 25%). The acceptance method is the same as given earlier for the welder test.

Hoskir: /* 712.2.3.1 High Strength Bolts */ updated per RR4181

2026-05-06T14:15:59Z

712.2.3.1 High Strength Bolts: updated per RR4181

← Older revision		Revision as of 09:15, 6 May 2026
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	All bolts, nuts, and washers should be from a PAL supplier in accordance with [[106.12 Pre-Acceptance Lists (PAL)\|Pre-Acceptance Lists (PAL)]]. If a supplier proposes to furnish structural steel connectors and is not on PAL, a request is to be made to the Construction and Material Division for acceptance into the PAL program. Once satisfactory submittals have been received, the supplier will be placed on the PAL. Bolts, nuts, and washers, for use other than bridge construction and in quantities less than 50, may be accepted from a PAL supplier without a PAL identification number.		All bolts, nuts, and washers should be from a PAL supplier in accordance with [[106.12 Pre-Acceptance Lists (PAL)\|Pre-Acceptance Lists (PAL)]]. If a supplier proposes to furnish structural steel connectors and is not on PAL, a request is to be made to the Construction and Material Division for acceptance into the PAL program. Once satisfactory submittals have been received, the supplier will be placed on the PAL. Bolts, nuts, and washers, for use other than bridge construction and in quantities less than 50, may be accepted from a PAL supplier without a PAL identification number.

	'''712.2.3.1.1 Manufacturer's Certification.''' Bolts and nuts specified to meet the requirements of ASTM A307 shall be accompanied by a manufacturer's certification statement that the bolts and nuts were manufactured to comply with requirements of ASTM A307 and, if required, galvanized to comply with requirements of ~~AASHTO M232 (~~ASTM ~~A153), Class C~~ or were mechanically galvanized and meet the coating thickness, adherence, and quality requirements of ASTM B695, Class 55. Certification shall be retained by the shipper. A copy should be obtained when sampling at the shipper and submitted with the samples to the lab.		'''712.2.3.1.1 Manufacturer's Certification.''' Bolts and nuts specified to meet the requirements of ASTM A307 shall be accompanied by a manufacturer's certification statement that the bolts and nuts were manufactured to comply with requirements of ASTM A307 and, if required, galvanized to comply with requirements of ASTM F2329 or were mechanically galvanized and meet the coating thickness, adherence, and quality requirements of ASTM B695, Class 55. Certification shall be retained by the shipper. A copy should be obtained when sampling at the shipper and submitted with the samples to the lab.

	All bolts, nuts and washers are to be identifiable as to type and manufacturer. Bolts, nuts, and washers manufactured to meet ASTM A307 will normally be identified on the packaging since no special markings are required on the item. Dimensions are to be as shown on the plans or as specified.		All bolts, nuts and washers are to be identifiable as to type and manufacturer. Bolts, nuts, and washers manufactured to meet ASTM A307 will normally be identified on the packaging since no special markings are required on the item. Dimensions are to be as shown on the plans or as specified.

Hoskir: /* 712.3.2.1 Chemical Tests - Bolts, Nuts, and Washers */ updated per RR4181

2026-05-06T14:14:50Z

712.3.2.1 Chemical Tests - Bolts, Nuts, and Washers: updated per RR4181

← Older revision		Revision as of 09:14, 6 May 2026
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	====712.3.2.1 Chemical Tests - Bolts, Nuts, and Washers====		====712.3.2.1 Chemical Tests - Bolts, Nuts, and Washers====
	~~Weight (mass)~~ of coating shall be determined in accordance with ~~AASHTO M232~~. Chemical analysis of the base metal shall be determined, when requested, according to [[:Category:1020 Corrugated Metallic-Coated Steel Culvert Pipe, Pipe-Arches and End Sections#1020.8 Laboratory Testing Guidelines for Sec 1020\|Laboratory Testing Guidelines for Sec 1020]]. Original test data and calculations shall be recorded in Laboratory workbooks.		Thickness of coating shall be determined in accordance with ASTM F2329 or where mechanically galvanized shall meet the coating thickness, adherence, and quality requirements of ASTM B659, Class 55. Chemical analysis of the base metal shall be determined, when requested, according to [[:Category:1020 Corrugated Metallic-Coated Steel Culvert Pipe, Pipe-Arches and End Sections#1020.8 Laboratory Testing Guidelines for Sec 1020\|Laboratory Testing Guidelines for Sec 1020]]. Original test data and calculations shall be recorded in Laboratory workbooks.

	====712.3.2.2 Physical Tests - Bolts and Nuts====		====712.3.2.2 Physical Tests - Bolts and Nuts====

Hoskir: /* 712.1.5.4.3 Step 3, Rotational Capacity */ updated formatting on table 712.1.5.4.3.3

2025-07-18T18:01:06Z

712.1.5.4.3 Step 3, Rotational Capacity: updated formatting on table 712.1.5.4.3.3

← Older revision		Revision as of 13:01, 18 July 2025
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	{\| class="wikitable"		{\| class="wikitable"
	\|-		\|-
	! colspan="5" \| Table 712.1.5.4.3.3 Rotation Capacity Testing Steps for Twist Off Tension Control Bolt Method (Section 712.7.7)		! colspan="5" \| Table 712.1.5.4.3.3<br>Rotation Capacity Testing Steps for Twist Off Tension Control Bolt Method (Section 712.7.7)
	\|-		\|-
	! colspan="5" \| Job Site Rotational Capacity Test A325TC/A490TC Bolts		! colspan="5" \| Job Site Rotational Capacity Test A325TC/A490TC Bolts

Hoskir: updated per RR4065

2025-07-14T12:44:26Z

updated per RR4065

Show changes

Hoskir: /* 712.1.7 Non-destructive Testing */ updated per RR3930

2024-09-06T13:45:07Z

712.1.7 Non-destructive Testing: updated per RR3930

← Older revision		Revision as of 08:45, 6 September 2024
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	In certain instances, non-destructive testing (NDT) may be required to be conducted on steel components of a bridge. The contractor will be responsible for providing and certified NDT technician to conduct the testing. This technician will usually be an employee of a third party inspection agency. Certification for NDT technicians will be in accordance with the requirements of The American Society for Nondestructive Testing (ASNT) Recommended Practice SNT-TC-1A. MoDOT does not maintain an approved list of NDT technicians. The Bridge Division does review certifications for testing agencies and keep a list of personnel of these agencies with their respective certifications.		In certain instances, non-destructive testing (NDT) may be required to be conducted on steel components of a bridge. The contractor will be responsible for providing and certified NDT technician to conduct the testing. This technician will usually be an employee of a third party inspection agency. Certification for NDT technicians will be in accordance with the requirements of The American Society for Nondestructive Testing (ASNT) Recommended Practice SNT-TC-1A. MoDOT does not maintain an approved list of NDT technicians. The Bridge Division does review certifications for testing agencies and keep a list of personnel of these agencies with their respective certifications.

	For projects that require NDT in the field, the inspector will collect the information from the contractor as to who will be providing the NDT services. The ~~inspector will then contact the Bridge Division Fabrication Section to determine if the NDT technician’s certifications have been reviewed. If the certifications have not been reviewed, the~~ contractor shall submit the certifications to the Resident Engineer to be forwarded to the Bridge Division at [mailto:Fabrication@modot.mo.gov Fabrication@modot.mo.gov]. These certifications shall include, ~~as a minimum~~, the ~~technicians test scores~~, ~~work experience, and annual eye exam results~~.		For projects that require NDT in the field, the inspector will collect the information from the contractor as to who will be providing the NDT services. The contractor shall submit the certifications to the Resident Engineer to be forwarded to the Bridge Division at [mailto:Fabrication@modot.mo.gov Fabrication@modot.mo.gov]. These certifications shall include the following documentation for each individual performing NDT: their certifications, current eye exam, and the NDT company written practice, including the Level III individual certification used for the written practice.

	At the Resident Engineer’s option, they may choose to keep a list of personnel who have performed NDT work for a quick reference for future projects. However, the Resident Engineer and the inspector will always request to see the current eye exam results prior the technician providing the NDT on these future projects.		At the Resident Engineer’s option, they may choose to keep a list of personnel who have performed NDT work for a quick reference for future projects. However, the Resident Engineer and the inspector will always request to see the current eye exam results prior the technician providing the NDT on these future projects.

Hoskir: /* 712.1.5.4.2.3 A325TC/A490TC Tension Control Bolt */

2022-12-16T14:48:25Z

712.1.5.4.2.3 A325TC/A490TC Tension Control Bolt

← Older revision		Revision as of 09:48, 16 December 2022
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	Rotational Capacity Testing is based on Table 712.1.5.4.3.3. Bolt checks will need to address questions shown in the table.		Rotational Capacity Testing is based on Table 712.1.5.4.3.3. Bolt checks will need to address questions shown in the table.

	Bolt inspection acceptance by load indicating bolt method will be made using Sec 712.7.76 and Sec 712.7.12(c).		Bolt inspection acceptance by load indicating bolt method will be made using Sec 712.7.7 and Sec 712.7.12(c).

	=====712.1.5.4.3 Step 3, Rotational Capacity=====		=====712.1.5.4.3 Step 3, Rotational Capacity=====

Hoskir: /* 712.1.5.4.2.2 A325/A490 Hex Head Bolt */

2022-12-15T20:56:41Z

712.1.5.4.2.2 A325/A490 Hex Head Bolt

← Older revision		Revision as of 15:56, 15 December 2022
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	The use of A325/A490 bolts will come with standard nuts, bolts, and washers. These will be tightened in the field using air tools and torque wrenches.		The use of A325/A490 bolts will come with standard nuts, bolts, and washers. These will be tightened in the field using air tools and torque wrenches.

	Rotational Capacity Testing is based on Table 712.1.5.4.3.1, Long Bolts, or& 712.1.5.4.3.2, Short Bolts. Bolt checks will need to address questions shown in the table used.		Rotational Capacity Testing is based on Table 712.1.5.4.3.1, Long Bolts, or 712.1.5.4.3.2, Short Bolts. Bolt checks will need to address questions shown in the table used.

	Bolt inspection acceptance by calibrated wrench will be made using Sec 712.7.5 and Sec 712.7.12(c).		Bolt inspection acceptance by calibrated wrench will be made using Sec 712.7.5 and Sec 712.7.12(c).

Hoskir: /* 712.1.5.4.2 Step 2, Inspection Type Selection */

2022-12-15T20:44:18Z

712.1.5.4.2 Step 2, Inspection Type Selection

← Older revision		Revision as of 15:44, 15 December 2022
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	=====712.1.5.4.2 Step 2, Inspection Type Selection=====		=====712.1.5.4.2 Step 2, Inspection Type Selection=====

	The second step is to determine the inspection type. The information below shows how to proceed once it is determined what type of bolt is being used in the field. The bolt type and verification method available will dictate the options and the requirements needed to follow for inspection in the field.		The second step is to determine the inspection type. The information below shows how to proceed once it is determined what type of bolt is being used in the field. The bolt type and verification method available will dictate the options and the requirements needed to follow for inspection in the field.

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	======712.1.5.4.2.1 Bolt Type======		======712.1.5.4.2.1 Bolt Type======

	The first step is to find out what type of bolt you are using in the field. The bolt type will dictate how much information is needed for the Rotational Capacity Testing.		The first step is to find out what type of bolt you are using in the field. The bolt type will dictate how much information is needed for the Rotational Capacity Testing.

	======712.1.5.4.2.2 A325/A490 Hex Head Bolt======		======712.1.5.4.2.2 A325/A490 Hex Head Bolt======

	The use of A325/A490 bolts will come with standard nuts, bolts, and washers. These will be tightened in the field using air tools and torque wrenches.		The use of A325/A490 bolts will come with standard nuts, bolts, and washers. These will be tightened in the field using air tools and torque wrenches.

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	======712.1.5.4.2.3 A325TC/A490TC Tension Control Bolt======		======712.1.5.4.2.3 A325TC/A490TC Tension Control Bolt======

	The use of A325TC/A490TC bolts will come with nuts, bolts and washers. These will be tightened in the field using a specialized tool designed to tighten the nut and the spline of the bolt.		The use of A325TC/A490TC bolts will come with nuts, bolts and washers. These will be tightened in the field using a specialized tool designed to tighten the nut and the spline of the bolt.

Hoskir: /* 712.1.5.4.2 Step 2, Inspection Type Selection */ updated per RR 3523

2022-12-15T20:31:46Z

712.1.5.4.2 Step 2, Inspection Type Selection: updated per RR 3523

@@ Line 286: / Line 286: @@
 =====712.1.5.4.2 Step 2, Inspection Type Selection=====
-The second step is to determine the inspection type. The flowchart below gives information on how to proceed once it is determined what type of bolt is being used in the field. The bolt type and verification method available will dictate the options and the requirements needed to follow for inspection in the field.
+The second step is to determine the inspection type. The information below shows how to proceed once it is determined what type of bolt is being used in the field. The bolt type and verification method available will dictate the options and the requirements needed to follow for inspection in the field.
 Prior to going into the field, determine the bolt type and the inspection method that will be used. This will allow you to know the equipment needed and discuss test procedures with the contractor.  For some test methods, the contractor will provide the calibrated equipment to check the bolts.
-[[image:Flowchart-High_Strength_Bolt_Inspection_2022.jpg|center|624px]]
+======712.1.5.4.2.1 Bolt Type======
 =====712.1.5.4.3 Step 3, Rotational Capacity=====