Structural Metal Framing AHA (Activity Hazard Analysis / Job Hazard Analysis)
Updated 2026-06-23
A Structural Metal Framing AHA (Activity Hazard Analysis / Job Hazard Analysis) is the plan that keeps the crew erecting structural metal framing safe from the fall from height during erection, from the structural stability during erection, and around the rigging, crane, and struck-by. Structural metal framing erects the structural metal frame of a structure — combining the fall-from-height during-erection hazard, the structural-stability during-erection hazard, and the rigging, crane, and struck-by hazard. This guide walks through building a Structural Metal Framing AHA that names the fall-from-height/erection, structural-stability/erection, and rigging- crane/struck-by hazards and assigns the fall-protection, stability, and rigging controls that hold up in the field.
Why structural metal framing needs its own AHA
Structural metal framing is the erection of the structural metal frame — the columns, beams, girders, and members that form the load-carrying skeleton of a structure, erected (typically by crane) and connected. This heads the structural steel/metal framing cluster. The defining feature is the steel-erection work, which is one of the highest-hazard construction activities and is governed by OSHA's steel erection standard (Subpart R): the fall hazard is severe (ironworkers work at height on the frame, often on narrow members), the structural stability during erection is critical (a partially erected frame must be stable — inadequate connection/bracing can cause collapse), and the rigging/crane and struck-by hazards of lifting heavy steel are significant. The hazards combine the fall-from-height during-erection (erecting the frame at height — the fall hazard (ironworkers work at height on the steel frame, on beams/columns, connecting members — falls are the leading steel-erection fatality)), the structural-stability during-erection (the partially erected frame must be stable — the stability hazard (an inadequately connected/braced frame during erection can collapse — connections, bracing, and erection sequence per the erection plan)), the rigging, crane, and struck-by (lifting heavy steel members by crane — the rigging/ crane hazards and the struck-by hazard (loads, swinging members)), and the connection/impalement. The fall-from-height/erection and the structural-stability/erection justify a dedicated AHA.
Breaking structural metal framing into steps
The steps for a Structural Metal Framing AHA follow the erection:
- Plan the erection (erection plan, sequence, stability, fall protection)
- Set up fall protection (perimeter, connecting)
- Rig and lift the steel members (crane, rigging)
- Land, connect, and secure the members (stability)
- Plumb, bolt-up/weld, and brace the frame
- Manage the fall, stability, and rigging hazards
- Verify the frame stability before decking/loading
- Complete
Each step carries a hazard, and the fall-from-height/erection, the structural-stability/erection, and the rigging-crane/struck-by are where the most significant risks concentrate.
The hazards step by step
Fall-from-height during-erection
Erecting the frame at height — the fall hazard (ironworkers work at height on the steel frame, on beams/columns, connecting members — falls are the leading steel-erection fatality). The controls are fall protection for steel erection (per the steel erection standard — fall protection at the required heights, controlled decking zones where applicable, perimeter protection, fall-arrest for connectors, and the specific steel-erection fall- protection provisions — falls from the steel frame are the leading steel-erection fatality), safe access on the steel, and the fall controls. The fall-from-height/erection is the primary defining hazard — falls are the leading steel-erection fatality. (These follow the steel-erection fall-protection fundamentals.)
Structural-stability during-erection
The partially erected frame must be stable — the stability hazard (an inadequately connected/braced frame during erection can collapse — connections, bracing, and erection sequence per the erection plan). The controls are ensuring structural stability during erection (the partially erected frame must be stable at every stage — minimum connections made before releasing a member from the crane, temporary bracing and guys per the erection plan, the column anchor-bolt and base-plate requirements, and following the engineered erection sequence — an inadequately connected or braced frame can collapse during erection), and the stability controls. The structural-stability/ erection is a defining hazard — an inadequately connected/braced frame can collapse during erection. (These follow the steel-erection-stability fundamentals.)
Rigging, crane, and struck-by
Lifting heavy steel members by crane — the rigging/crane hazards and the struck-by hazard (loads, swinging members). The controls are safe rigging and crane operation for the steel lifts (rated rigging, qualified crane/ rigging/signaling, the heavy steel lifts), struck-by protection (exclusion under loads, tag lines for swinging members, no one under suspended steel), and the rigging/struck-by controls. The rigging-crane/struck-by is a defining hazard — lifting heavy steel brings rigging/crane and struck-by hazards. (These follow the rigging/crane fundamentals.)
Connection/impalement
The connection and impalement (making connections, projecting bolts/rebar, and impalement) carries the connection/impalement hazard. The controls are safe connection work, impalement/projecting-hazard protection, and the connection controls. (These follow the connection fundamentals.)
A simple Structural Metal Framing AHA structure
| Step | Hazard | Control | Standard |
|---|---|---|---|
| Plan | Collapse | Plan the erection (plan, sequence, stability, fall protection) | OSHA 1926 Subpart R |
| Fall protection | Fall | Set up fall protection (perimeter, connecting) | OSHA 1926.760 |
| Rig/lift | Struck-by | Rig and lift the steel members (crane, rigging) | OSHA 1926.753 |
| Connect | Collapse | Land, connect, and secure the members (stability) | OSHA 1926.756 |
| Plumb/brace | Collapse | Plumb, bolt-up/weld, and brace the frame | OSHA 1926.755 |
| Verify | Collapse | Verify the frame stability before decking/loading | project |
Steel-erection fall protection and structural-stability control
A Structural Metal Framing AHA centers on steel-erection fall protection and structural-stability control. The steel-erection fall protection addresses the severe fall hazard — controlled by fall protection for steel erection (per the steel erection standard — fall protection at the required heights, perimeter protection, fall-arrest for connectors, controlled decking zones). The structural-stability control addresses the partially erected frame — controlled by ensuring structural stability during erection (minimum connections before releasing from the crane, temporary bracing and guys, anchor-bolt/base-plate requirements, engineered erection sequence). And the rigging/ crane and connections get rigging, struck-by, and connection controls. An AHA built on steel-erection fall protection and structural-stability control, with rigging controls, addresses the hazards that define structural metal framing.
From the field: what actually goes wrong
In fourteen years across federal, heavy civil, and industrial projects, structural metal framing erects the load-carrying metal frame, and it is one of the highest-hazard construction activities — steel erection — governed by its own OSHA standard (Subpart R) precisely because of its severe hazards. The fall-from-height during-erection hazard is the primary defining concern — steel erection is done at height on the frame, with ironworkers walking and working on beams and columns and connecting members high in the air, and falls from the steel frame are the leading cause of steel-erection fatalities, so fall protection for steel erection (per the steel erection standard — fall protection at the required trigger heights, perimeter cable protection, personal fall arrest for connectors, controlled decking zones where applicable, and the specific steel-erection fall-protection provisions) is the central, life-critical control. Falls are what kill ironworkers, so the fall protection is paramount.
The structural-stability during-erection and the rigging-crane/struck-by are the other defining hazards, and the stability is the one with catastrophic collapse potential. On the projects I have run, a partially erected steel frame must be stable at every stage of erection, because an inadequately connected or braced frame can collapse during erection — killing the crew on and around it — so ensuring structural stability during erection is critical: making the minimum required connections before releasing a member from the crane (a member is not stable until connected), installing temporary bracing and guy wires per the erection plan, meeting the column anchor-bolt and base-plate requirements (columns must be properly anchored — the anchor-bolt requirements exist because inadequately anchored columns have caused collapses), and following the engineered erection sequence. Erection-stage collapse from inadequate connection or bracing is a catastrophic steel-erection failure mode. And the rigging-crane/struck-by hazard is lifting the heavy steel members by crane (rated rigging, qualified crane and rigging and signaling) with struck-by protection (no one under suspended steel, tag lines for swinging members). The connection and impalement hazards round it out. The AHA built on steel-erection fall protection and structural-stability control is the one that protects the erection crew.
The bottom line
A Structural Metal Framing AHA names the fall-from-height/erection, the structural-stability/erection, and the rigging-crane/struck-by hazards with specific controls — fall protection for steel erection per the steel erection standard (falls are the leading steel-erection fatality), ensuring structural stability during erection (minimum connections before releasing from the crane, bracing/guys, anchor-bolt requirements, engineered sequence — to prevent erection-stage collapse), and safe rigging/crane operation with struck-by protection. The steel-erection fall protection and the structural-stability control are the defining concerns. The AHA that manages both is the one that protects the crew.
Frequently asked questions
Why are falls the leading steel-erection hazard?
Steel erection is done at height on the frame, with ironworkers walking and working on beams and columns and connecting members high in the air, and falls from the steel frame are the leading cause of steel-erection fatalities. Controls are fall protection for steel erection (per the steel erection standard — fall protection at the required heights, perimeter protection, personal fall arrest for connectors, controlled decking zones, and the specific steel-erection provisions), safe access on the steel, and the fall controls.
Why is structural stability during erection critical?
A partially erected steel frame must be stable at every stage, because an inadequately connected or braced frame can collapse during erection, killing the crew on and around it. Controls are ensuring structural stability during erection (minimum connections made before releasing a member from the crane, temporary bracing and guys per the erection plan, the column anchor-bolt and base-plate requirements, following the engineered erection sequence), and the stability controls.
What rigging and struck-by hazards apply?
Lifting heavy steel members by crane brings the rigging/crane hazards and the struck-by hazard (loads, swinging members). Controls are safe rigging and crane operation for the steel lifts (rated rigging, qualified crane/rigging/signaling), struck-by protection (exclusion under loads, tag lines, no one under suspended steel), and the rigging/struck-by controls.
What is structural metal framing?
Structural metal framing is the erection of the structural metal frame — the columns, beams, girders, and members that form the load-carrying skeleton of a structure, erected by crane and connected. Because steel erection has a severe fall hazard (the leading fatality), the partially erected frame can collapse if inadequately connected/braced, and lifting heavy steel brings rigging/struck-by hazards, those hazards apply.
Related AHAs and JHAs
- Structural Steel Framing AHA — the structural steel framing detail
- Structural Welding AHA — the welding of the frame
- Steel Erection JHA — the steel-erection fundamentals
- Structural Steel Bolt-Up JHA — the bolt-up connection fundamentals
Written by Mustafa Tok, CSP, ASP, CHST — OSHA Authorized Outreach Trainer with 14+ years of international construction safety experience across federal, heavy civil, and industrial projects.