AASHTO M 269-96 (2018) PDF Download

The AASHTO M 269-96 (2018) standard specifies the requirements for forged turnbuckles and shackles used in applications such as guardrails and sign supports. This standard assumes that these items are commercially available, but it does not cover all the different classes, styles, and types that may be available.

For turnbuckles, the specification mandates that they must be forged and designed according to the purchaser's requirements. The sizes of the turnbuckles are listed in Table 2 and must be specified as per the standard.

Similarly, for shackles, they must belong to one of the classes identified in Table 1. The specific class is determined by the purchaser based on their requirements.