SEMC Step Bolt

Step-bolts are designed to enable a climber to access elevated work locations and are a part of the structure’s climbing facility. On some structures step-bolts are the only means to physically climb in order to access an elevated work location. Prior to climbing any structure, climbers must review, understand and implement the employer’s site-specific fall protection plan. Always follow manufacturer specifications for proper installation.

ANSI/TIA-222-I: 12.5.1 Step Bolts

 The following additional requirements apply to step bolts:

1. Step bolts shall not be less than 0.625 in. [16 mm] in nominal diameter or width.

2. Clear width between the exterior face of the outer retaining nut supporting the step bolt and the inside face of the step bolt head shall not be less than 4.5 in. [110 mm].

3. The step bolt head shall provide an area not less than the area provided by a nominal 2 in. [51 mm] diameter round step bolt head to ensure a climber’s foot cannot slide off the end of a step bolt.

4. The outer edge or perimeter of the step bolt head shall have a flat or curved surface to avoid sharp edges hazardous to climbers.

5. The horizontal spread between the attachment points of step bolts shall not exceed 24 in. [610 mm].

6. Step bolt material shall meet the requirements of ASTM A449 and shall be tested as finished step bolts at Test Frequency P (Piece Testing) of ASTM A673 to meet a minimum absorbed energy requirement at -20 degrees F [-29 degrees C] of 15 ft-lbs. [20 J] average for 3 specimens and a minimum of 12 ft-lbs. [16 J] for any 1 specimen in accordance with ASTM A370.

7. Step bolt clip material shall meet the requirements of one of the following: ASTM A572 Grade 50 plate steel; ASTM A1011/A1018 HSLAS Grade 50, Class 1 or 2, hot rolled sheet or strip steel; ASTM A36 steel shapes; ASTM A529 Grade 50 or 55 steel shapes. Step bolt clips intended for use as a fall protection anchorage shall also meet the strength requirements for fall protection anchorage.

Step bolt clips intended for use as a fall protection anchorage shall also meet the strength requirements for a fall protection anchorage.

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Additional Resources:

PAN Step-Bolts

NATE Step-Bolt Climber Connection Video