Description

Objectives

Upon completion of this module, the trainee will be able to do the following:

• Recognize and identify A-325 and A-490 bolts, washers, and nuts by their identifying markings.
• Identify the four common methods of correctly tensioning bolts.
• Describe how to use the tension control, calibrated wrench, and turn-of-nut methods of tightening high-strength bolts.

Performance Tasks

Under the supervision of the instructor, the trainee should be able to do the following:

• Identify selected high-strength bolts.
• Demonstrate the turn-of-nut method.
• Demonstrate calibrated wrench tightening.
• Demonstrate the proper use of a tension control gun.

Module Index

Session I. Introduction; Methods for Tensioning Bolts; Threaded Fasteners; Bolting Up Structural Steel; Load-Indicating Washer; Skidmore

A. Introduction

B. Methods for Tensioning Bolts

C. Threaded Fasteners

• • Thread Standards
  • A-325 Bolts
  • A-490 Bolts
  • Determining Bolt Length
  • Bevel Washers
  • Care of Bolts
  • Laboratory – Have the trainees identify selected high-strength bolts. This laboratory corresponds with Performance Task 1.

D. Bolting Up Structural Steel

• • Tension Control Bolts
  • Calibrated Wrench Tightening
  • Turn-of-Nut Method

E. Load-Indicating Washer

F. Skidmore Calibrator

Session II. Laboratory; Review and Testing

A. Laboratory

• • Have trainees demonstrate the turn-of-nut method. This laboratory corresponds to Performance Task 2.
  • Have trainees demonstrate calibrated wrench tightening. This laboratory corresponds to Performance Task
  • Have trainees demonstrate the proper use of a tension control gun. This laboratory corresponds to Performance Task 4.

B. Review

C. Module Examination

• • Trainees must score 70 percent or higher to receive recognition from NCCER.
  • Record the testing results on NCCER Natinal Registry, and submit the results to the Training Program Sponsor.

D. Performance Testing

• • Trainees must perform each task to the satisfaction of the instructor to receive recognition from NCCER. If applicable, proficiency noted during laboratory exercises can be used to satisfy the Performance Testing requirements.
  • Record the testing results on NCCER Natinal Registry, and submit the results to the Training Program Sponsor.