#	Letters of Interpretation
1	02/23/2004 - 1926.550(a), 1926.550(a)(5), 1926.550(a)(6) - Identification, inspection, and marking of cranes when manufacturer-supplied identifications are unavailable.
2	02/19/2004 - 1926.550(a), 1926.550(a)(17) - Inspection, testing, and operation requirements for Woltman PVE 5021S pile driving equipment.
3	01/16/2003 - 1926.550(a), 1926.550(a)(9) - Necessary precautions required to prevent entry into a swinging superstructure's radius.

#	Federal Register
1	05/21/2018 - 1926.550(a) - 83:23534-23569 - Cranes and Derricks in Construction: Operator Qualification; Proposed Rule
2	10/05/2004 - 1926.550(a) - 69:59617-59618 - Submission for OMB Review: Comment Request - PDF
3	07/28/2004 - 1926.550(a) - 69:45081-45082 - Cranes and Derricks Standard for Construction; Extension of the Office of Management and Budget's (OMB) Approval of Information Collection (Paperwork) Requirements - PDF
4	09/25/2001 - 1926.550(a) - 66:49045-49046 - Submission for OMB Review; Comment Request - PDF
5	07/10/2001 - 1926.550(a) - 66:36001-36002 - Cranes and Derricks Standard for Construction: Recording Tests for Toxic Gases and Oxygen-Deficient Atmospheres in Enclosed Spaces; Extension of the Office of Management of Budget's (OMB) Approval of Information-Collection (Paperwork) Requirements - PDF
6	07/10/2001 - 1926.550(a) - 66:35998-35999 - Cranes and Derricks Standard for Construction: Notification of Operational Specifications and Hand Signals; Extension of the Office of Management and Budget's (OMB) Approval of Information-Collection (Paperwork) Requirements - PDF