Key Takeaways
- The A/D director is the person who oversees and directs all crane assembly and disassembly operations under OSHA 29 CFR 1926.1404.
- The A/D director must meet OSHA’s criteria for both a competent person and a qualified person, or be a competent person assisted by one or more qualified persons.
- OSHA 1926.1404(h) lists 12 specific hazards the A/D director must address, from ground conditions and blocking to counterweight stability and wind speed.
- The A/D director must brief every crew member on their tasks, associated hazards, and hazardous positions before operations begin, and re-brief when tasks change or new personnel join.
- NCCCO offers a voluntary A/D Director certification with separate exams for Mobile Crane and Tower Crane specialties.
The Direct Answer
The person who oversees and directs all crane assembly and disassembly operations is the Assembly/Disassembly (A/D) director. This is one of the most commonly tested questions on NCCCO exams and OSHA 10/30 assessments, and the answer comes directly from OSHA 29 CFR 1926.1404(a)(1).
If you are preparing for an NCCCO certification exam or managing A/D operations on site, you need to know more than the one-line answer. This article from American Crane & Safety covers the full scope of the A/D director role: the qualifications OSHA requires, the duties the standard assigns, the 12 specific hazards listed in 1926.1404(h), and the NCCCO A/D Director certification path.
What Is an A/D Director?
OSHA defines the A/D director in 29 CFR 1926.1401 as “an individual who meets this subpart’s requirements for an A/D director, irrespective of the person’s formal job title or whether the person is non-management or management personnel.”
The title is not about rank or job classification. It is about meeting two specific qualification standards at the same time.
The Dual Qualification Requirement
Under 1926.1404(a)(1), A/D operations must be “directed by a person who meets the criteria for both a competent person and a qualified person, or by a competent person who is assisted by one or more qualified persons.”
If only one person performs the assembly or disassembly, that individual must meet both sets of criteria and is considered the A/D director per 1926.1404(a)(2).
Competent Person vs. Qualified Person
Both terms have specific OSHA definitions under 1926.1401. They are not interchangeable.
| Criteria | Competent Person | Qualified Person |
|---|---|---|
| OSHA Source | 1926.1401 | 1926.1401 |
| Core Requirement | Identify existing and predictable hazards | Solve and resolve problems related to the subject matter |
| Demonstrated By | Capability and authorization to act | Degree, certificate, professional standing, or extensive knowledge, training, and experience |
| Corrective Authority | Must have authorization to take prompt corrective measures | Not explicitly required to have corrective authority |
| A/D Director Requirement | Required | Required (or the competent person must be assisted by one or more qualified persons) |
The competent person definition emphasizes hazard recognition and the authority to stop work. The qualified person definition emphasizes technical knowledge and problem-solving ability. The A/D director needs both.
A/D Director Duties Under 1926.1404
The standard assigns several specific responsibilities to the A/D director. These are not suggestions. They are regulatory requirements.
Knowledge and Review of Procedures
- 1926.1404(b): The A/D director must understand the applicable assembly/disassembly procedures.
- 1926.1404(c): The A/D director must review A/D procedures immediately before starting work. The only exception: the director has already applied the same procedures to the same type and configuration of equipment, including accessories.
Crew Briefing Requirement
Before A/D operations begin, 1926.1404(d) requires the A/D director to ensure that every crew member understands three things:
- Their assigned tasks
- The hazards associated with those tasks
- The hazardous positions and locations they need to avoid
This briefing is not a one-time event. The A/D director must repeat it when:
- A crew member is assigned a different task during operations
- New personnel join the crew during operations
Protecting Crew Members Out of Operator View
Under 1926.1404(e), any crew member who moves to a location out of the operator’s view must inform the operator before going. The operator must not move the crane or any components until that crew member confirms they are in a safe position.
Restrictions on Working Under the Boom or Jib
Per 1926.1404(f), employees must not be under the boom, jib, or other components when pins are being removed. If site constraints make this unavoidable, the A/D director must implement specific procedures that minimize the risk of exposure.
12 Hazards the A/D Director Must Address
OSHA 1926.1404(h) lists 12 hazards that the A/D director is responsible for managing. This list appears frequently on NCCCO exams.
- Site and ground bearing conditions (h)(1): Assessing whether the ground can support the crane and components during A/D.
- Blocking material (h)(2): Evaluating the size, amount, condition, and stacking method of blocking.
- Proper location of blocking (h)(3): Ensuring blocking protects structural integrity and prevents dangerous movement or collapse.
- Verifying assist crane loads (h)(4): Confirming that loads on any assist crane used during A/D are within rated capacity.
- Boom and jib pick points (h)(5): Selecting correct pick points for lifting boom and jib sections.
- Center of gravity (h)(6): Identifying the center of gravity of components being lifted or supported.
- Stability upon pin removal (h)(7): Verifying that the crane remains stable when pins are removed.
- Snagging (h)(8): Preventing suspension ropes or pendants from catching on pins during removal.
- Struck by counterweights (h)(9): Addressing unintended counterweight movement from inadequate support.
- Boom hoist brake failure (h)(10): Testing the boom hoist brake before relying on it. If the brake is insufficient, backup devices are required.
- Loss of backward stability (h)(11): Evaluating stability before swinging the upperworks, traveling, or attaching/removing components.
- Wind speed and weather (h)(12): Monitoring conditions that affect safe A/D operations.
Every one of these hazards must be addressed before and during A/D operations. The A/D director is personally responsible for ensuring each one is accounted for.
Outrigger, Capacity, and Rigging Requirements
Beyond the 12 listed hazards, 1926.1404 includes additional requirements that fall under the A/D director’s oversight.
Outriggers and Stabilizers
Per 1926.1404(q), outriggers and stabilizers must be:
- Fully extended, or set per the manufacturer’s load chart for the planned configuration
- Set to remove the crane’s weight from the wheels
- Equipped with floats attached
- Visible to the operator or a signal person during extension and setting
- Supported with blocking that meets the requirements in (h)(2) and (h)(3)
Capacity Limits
1926.1404(g) states that rated capacity limits for the equipment, its components, rigging, lifting lugs, and accessories must not be exceeded during any phase of assembly or disassembly.
Rigging
Under 1926.1404(r), all rigging work during A/D must be performed by a qualified rigger. When synthetic slings are used, they must be protected from abrasive, sharp, or acute edges.
Component Weights
1926.1404(k) requires that the weight of each component be readily available to the A/D director and crew.
Manufacturer Procedures vs. Employer Procedures
OSHA 1926.1403 governs which A/D procedures the employer must follow. The employer must comply with all manufacturer prohibitions and then follow either:
- Manufacturer procedures for assembly and disassembly, or
- Employer procedures, but only if those procedures meet the requirements of 1926.1406
One exception: when synthetic slings are used during A/D rigging, the employer must follow the manufacturer’s procedures. Employer-developed procedures are not permitted in that case.
The A/D director must know which set of procedures applies before starting work and must review them per 1926.1404(c).
A/D Director vs. Lift Director
These two roles are distinct under OSHA Subpart CC. Do not confuse them.
| Role | Scope | Governing Standard |
|---|---|---|
| A/D Director | Assembly and disassembly of the crane itself | 1926.1404 |
| Lift Director | Lifting operations after the crane is assembled | 1926.1400 series (various sections) |
A single individual may fill both roles at different phases of a project, but the qualifications, duties, and regulatory requirements are separate.
NCCCO A/D Director Certification
NCCCO offers a voluntary A/D Director certification. This credential is not required by OSHA, but it demonstrates that the holder meets the qualified person criteria for directing assembly and disassembly operations.
Exam Details
- Format: 45 multiple-choice questions
- Time limit: 60 minutes
- Specialties: Mobile Crane and Tower Crane (separate exams)
- Certification validity: 5 years
- Eligibility: 18 years of age, compliance with CCO Substance Abuse Policy and Code of Ethics
Exam Domains
The written exam covers four domains:
- Regulatory Compliance and Safety
- Planning and Preparation
- Verification and Documentation
- Assembly and Disassembly Execution
The content of this article maps directly to Domain 1 (regulatory compliance) and Domain 4 (execution). The 12 hazards from 1926.1404(h) and the crew briefing requirements from 1926.1404(d) are prime exam material.
For more information on NCCCO certification programs, visit nccco.org.
OSHA Enforcement
Violations of 1926.1404 can result in citations and penalties. OSHA adjusts penalty amounts annually. Current penalty schedules are available at osha.gov/penalties.
Crane assembly and disassembly operations are among the highest-risk activities on construction sites. OSHA’s Subpart CC final rule, which took effect November 8, 2010, was specifically designed to address leading causes of crane fatalities, including crushed-by and struck-by hazards during assembly and disassembly. The NCCCO Guide to Subpart CC provides additional background on the rulemaking.
California Note
California Title 8, Section 5010.1 mirrors the federal standard with one addition: the process of jumping the crane or derrick must also be supervised by the A/D director.
If you operate in California or other states with state-plan OSHA programs, verify whether your state has adopted identical or more stringent requirements.
How AMC&S Training Fits
American Crane & Safety does not offer A/D Director exam prep. Its courses cover related rigging and crane safety knowledge.
- NCCCO Prep Course: Online preparation for the NCCCO Rigger Level 1 exams. Subpart CC requires a qualified rigger for rigging work during assembly and disassembly. Available in the online course catalog.
- Crane Awareness Course: For workers who work around cranes but do not operate them. Also available online.
- On-site training: AMC&S instructors can deliver training at your location for full crews. This format works well for training full crews in rigging and crane safety.
- Rigger training and NCCCO prep by state: Find location-specific training options.
For additional questions about course formats and scheduling, visit the AMC&S FAQ page or the About Us page for company background.
Summary of A/D Director Requirements
| Requirement | Standard Reference |
|---|---|
| Must be competent and qualified (or competent with qualified assistance) | 1926.1404(a) |
| Must understand A/D procedures | 1926.1404(b) |
| Must review procedures before starting | 1926.1404(c) |
| Must brief crew on tasks, hazards, and hazardous locations | 1926.1404(d) |
| Must address all 12 listed hazards | 1926.1404(h) |
| Must ensure capacity limits are not exceeded | 1926.1404(g) |
| Must ensure rigging is done by a qualified rigger | 1926.1404(r) |
| Must ensure outriggers/stabilizers are properly set | 1926.1404(q) |
| Must ensure post-assembly inspection is completed | 1926.1404(m)(2) |
The A/D director role carries significant responsibility. Whether you are studying for an NCCCO exam or taking on A/D director duties at your company, a thorough understanding of 1926.1404 is non-negotiable.
Frequently Asked Questions (FAQ)
Who oversees and directs all crane assembly and disassembly operations?
The Assembly/Disassembly (A/D) director. OSHA 29 CFR 1926.1404(a)(1) requires that A/D operations be directed by a person who meets the criteria for both a competent person and a qualified person, or by a competent person assisted by one or more qualified persons.
Is the A/D director the same as a lift director?
No. The A/D director oversees assembly and disassembly of the crane itself. The lift director manages lifting operations once the crane is assembled and ready to work. They are separate roles under OSHA Subpart CC.
Does OSHA require the A/D director to hold NCCCO certification?
No. OSHA requires the A/D director to meet competent person and qualified person criteria but does not mandate a specific certification. NCCCO A/D Director certification is a voluntary credential that demonstrates those qualifications.
What hazards must the A/D director address under 1926.1404?
OSHA 1926.1404(h) lists 12 hazards including site and ground bearing conditions, blocking material, boom and jib pick points, center of gravity, pin removal stability, counterweight movement, boom hoist brake failure, loss of backward stability, and wind speed.
Where can I prepare for the NCCCO exam that covers A/D director knowledge?
NCCCO administers the A/D Director exams. American Crane & Safety does not offer A/D Director exam prep. It offers the Crane Awareness Course and Rigging Courses online at amcands.talentlms.com/catalog and on-site at https://amcands.com/on-site-course/, and its online NCCCO Prep Course covers NCCCO Rigger Level 1.