Michigan Department HEAT STRAIGHTENING PLAN of Transportation To be completed by the Heat Straightening Contractor0388 (07 /19)

and submitted to the Engineer for approval.

Naming Convention: 0388 SN-CS-JN YYYY-MM-DD Heat Straightening Plan.pdf

PROJECT DESCRIPTION CONTROL SECTION

Structural Fabrication Unit Approval Block

CONTRACTOR JOB NUMBER

HEAT STRAIGHTENING CONTRACTOR STRUCTURE NUMBER

PREPARED BY DATE

STEEL THICKNESS

ORIFICE TYPE

TEMPERATURE SENSING DEVICES

STEEL GRADE

ORIFICE SIZE

JACK CALIBRATION DATE

The Contractor must comply with subsection 713.03.G of the MOOT Standard Specifications for Construction, 12SP-713A Heat Straightening Damaged Structural Steel, and all other contract requirements.

• Steel must be heated to a temperature no greater than 1200 ° F unless otherwise specified in the

contract.

• After each heat straightening cycle, allow steel to cool to below 250 ° F before beginning the next heating

cycle.

• Torch tips must be between¾" and 1".

• Limit "V" heat angles to 20 ° and "V" heat angle bases to 6".

• Flange plates and angles must be straightened to within ¼" of the tilt rotation at the edges from the web,with ½" of sweep over 20', ¾" at the point of impact.

• Webs must be straightened to less than ½" out of plumb.

• Reduce localized deflections in the web to no greater than ½", vertically and horizontally.

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NAME Please list all key staff members who will be working on the project. Key staff members must be onsite and directly supervising the heat straightening operations at all times. Key staff members not listed will not be allowed to work on the jobsite. Non-key staff members applying jacking forces or heat must be listed in the comments section below.

NAME

NAME

NAME

GENERAL INFORMATION

KEY STAFF MEMBERS

TOOLS & EQUIPMENT

SPECIFICATIONS & TOLERANCES

MOOT 0388 (07/19)

NON-DESTRUCTIVE TESTING

All damaged areas specified on the plans and all heat straightened areas must be 100 percent visual testing (VT) inspected by an American Welding Society (AWS) Certified Welding Inspector (CWI). All weldments located in or adjacent to damage areas specified on the plans, located in or adjacent to heat straightened areas, and on components (clip plates, connection plates, intermediate stiffeners, etc.) that connect the beam/girder that was damaged to other beam/girder lines as determined by the Engineer must be 100 percent VT inspected by an AWS CWI and 100 percent Magnetic Particle Testing (MT) inspected by an American Society for Nondestructive Testing (ASNT) Level II or Ill technician. Inspection be in accordance with AASHTO/AWS D1 .5:2010, Bridge Welding Code (as modified by 12SP707 A- Structural Steel and Aluminum Construction). Field welding requires an AASHTO/AWS D1 .5 - Field Welding Plan (MDOT Form 0395) to be completed and submitted for review and approval by the Engineer prior to welding.

HEAT STRAIGHTENING PROCEDURE

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