Abstract: At least one feature provides a fall arrest device for securing a user. The fall arrest device comprises a primary support member adapted to couple to a doorway, a security line having a first end adapted to couple to the primary support member, and a harness adapted to couple to a second end of the security line. The primary support member includes a first support member adapted to secure the primary support member to a first surface of a wall of the doorway, a second support member adapted to secure the primary support member to a second surface of the wall of the doorway, and at least one connecting member adapted to removeably couple the first support member and the second support member to each other. The connecting member may be adjusted to change a spacing between the first and second support members to secure the primary support member to the doorway.