F.8.5 Imact Attenuator Attachment

F.8.5.1  The attachment of the Impact Attenuator to the Anti Intrusion Plate or Front Bulkhead must be documented in the SES submission

F.8.5.2  The Impact Attenuator must attach with an approved method:  

F.8.5.3 When the Impact Attenuator is attached by bonding:

• a. Bonding must meet F.5.5

• b. The shear strength of the bond must be greater than:

• 1. 95 kN for foam Impact Attenuators

  2. 38.5 kN for honeycomb Impact Attenuators

  3. The maximum compressive force for custom Impact Attenuators

• c. The entire surface of a foam Impact Attenuator must be bonded

• d. Only the pre-crushed area of a honeycomb Impact Attenuator may be used for bond equivalence

F.8.5.4  When the Impact Attenuator is attached by welding:

• • a. Welds may be continuous or interrupted

  • b. If interrupted, the weld/space ratio must be 1:1 or greater

  • c. All weld lengths must be greater than 25 mm
    

F.8.5.5  When the Impact Attenuator is attached by bolting:

• • a. Must have no less than eight 8 mm or 5/16” minimum diameter Critical Fasteners, T.8.2

  • b. The distance between any two bolt centers must be 50 mm minimum

  • c. Each bolt attachment must have pullout, tearout and bending capabilities of 15 kN

  • d. Must be bolted directly to the Primary Structure

F.8.5.6  Position
The Impact Attenuator must mount so the listed edges are above the lowest point on the top of the Lower Side Impact Structure by the following dimensions: 

Explanation