Metal Pan Stairs AHA (Activity Hazard Analysis / Job Hazard Analysis)

Updated 2026-06-23

A Metal Pan Stairs AHA (Activity Hazard Analysis / Job Hazard Analysis) is the plan that keeps the crew installing metal pan stairs safe through the concrete fill placement and caustic contact, from the heavy stair rigging and fall during installation, and around the open risers and welding. Metal pan stairs installs metal-pan stairs and fills the pans with concrete — combining the concrete-fill-placement and caustic-contact hazard, the heavy-stair- rigging and fall-during-installation hazard, and the open-riser and welding hazard. This guide walks through building a Metal Pan Stairs AHA that names the concrete-fill-placement/caustic-contact, heavy-stair-rigging/fall- during-installation, and open-riser/welding hazards and assigns the concrete, rigging/fall, and open-riser controls that hold up in the field.

Why metal pan stairs needs its own AHA

Metal pan stairs is the installation of metal-pan stairs — steel stairs whose treads are formed as "pans" (steel tread pans) that are filled with concrete on site to form the finished tread surface. This continues the metal stairs cluster, focused on pan stairs. The defining feature is the combination of metal-stair installation with concrete filling: the metal stair installation carries the heavy-stair rigging and fall hazards of the metal stairs AHA, plus the additional concrete-fill placement (placing concrete into the tread pans — caustic concrete contact, and the specific hazard that empty tread pans before filling are a slip/trip and inadequate-tread hazard). The hazards combine the concrete-fill-placement and caustic-contact (filling the tread pans with concrete — the concrete-placement hazard (placing concrete into the tread pans) and the caustic-contact hazard (concrete/ cement burns), and the empty-pan hazard (unfilled tread pans are a slip/trip and inadequate-tread hazard before filling)), the heavy-stair-rigging and fall-during-installation (rigging the heavy stairs and installing at height — the rigging and fall hazards, as in metal stairs), the open-riser and welding (the open risers before railings, and welding/cutting — the fall and hot-work hazards), and the access. The concrete-fill-placement/caustic-contact and the heavy-stair-rigging/fall-during-installation justify a dedicated AHA.

Breaking metal pan stairs into steps

The steps for a Metal Pan Stairs AHA follow the work:

• Plan the installation (rigging, fall protection, concrete fill)
• Set up fall protection for the installation
• Rig and set the pan-stair assembly (crush)
• Connect/weld the stairs; install railings promptly
• Place the concrete fill in the tread pans (caustic contact)
• Manage the concrete, rigging, fall, and open-pan hazards
• Cure/finish the concrete treads
• Complete

Each step carries a hazard, and the concrete-fill-placement/caustic-contact, the heavy-stair-rigging/fall-during- installation, and the open-riser/welding are where the most significant risks concentrate.

The hazards step by step

Concrete-fill-placement and caustic-contact

Filling the tread pans with concrete — the concrete-placement hazard (placing concrete into the tread pans) and the caustic-contact hazard (concrete/cement burns), and the empty-pan hazard (unfilled tread pans are a slip/trip and inadequate-tread hazard before filling). The controls are safe concrete-fill placement (placing concrete into the steel tread pans — controlled placement, and caustic-contact protection (concrete/cement causes burns — gloves, skin protection)), managing the empty-pan hazard (unfilled tread pans before the concrete is placed are a slip/trip hazard and provide inadequate footing — awareness, temporary protection, or sequencing the fill so the stairs are not used with empty pans), and the concrete/contact controls. The concrete-fill-placement/caustic- contact is a defining hazard — placing concrete fill brings caustic contact and the empty-pan hazard. (These follow the concrete-placement and cement-contact fundamentals.)

Heavy-stair-rigging and fall-during-installation

Rigging the heavy stairs and installing at height — the rigging and fall hazards, as in metal stairs. The controls are safe rigging and setting of the heavy pan-stair assemblies (rated rigging, controlled setting, crush awareness, exclusion below), fall protection during the installation (installing between levels at height), and the rigging/fall controls. The heavy-stair-rigging/fall-during-installation is a defining hazard — heavy pan stairs installed at height. (These follow the rigging and fall-protection fundamentals.)

Open-riser and welding

The open risers before railings, and welding/cutting — the fall and hot-work hazards. The controls are promptly installing the stair railings/guards (open-sided stairs and open risers are a fall hazard), safe welding/cutting (hot work for welding, cutting to fit), and the open-riser/welding controls. The open-riser/welding is a defining hazard. (These follow the fall-protection and hot-work fundamentals.)

Access

The access (using the stairs for access) carries the access hazard. The controls are safe use of the installed stairs (not using stairs with empty pans or without railings as access), and the access controls. (These follow the housekeeping fundamentals.)

A simple Metal Pan Stairs AHA structure

Concrete-fill/contact control and rigging/fall-protection safety

A Metal Pan Stairs AHA centers on concrete-fill/contact control and rigging/fall-protection safety. The concrete-fill/contact control addresses the concrete filling — controlled by safe concrete-fill placement with caustic-contact protection and managing the empty-pan slip/trip and inadequate-tread hazard before filling. The rigging/fall-protection safety addresses the heavy stairs and the at-height install — controlled by safe rigging and setting of the heavy pan stairs and fall protection during the installation with prompt railing installation. And the welding and access get hot-work and access controls. An AHA built on concrete-fill/contact control and rigging/fall-protection safety, with welding controls, addresses the hazards that define metal pan stairs.

From the field: what actually goes wrong

In fourteen years across federal, heavy civil, and industrial projects, metal pan stairs installs metal-pan stairs and fills the tread pans with concrete, and it adds the concrete-filling dimension to the metal-stair hazards. The concrete-fill-placement and caustic-contact hazard is a primary defining concern that distinguishes pan stairs — the treads of pan stairs are formed as steel pans that are filled with concrete on site to form the finished tread surface, so the work includes placing concrete into the tread pans (the concrete-placement and caustic-contact hazards — concrete and cement cause burns, so gloves and skin protection), and, importantly, there is a distinct empty-pan hazard: before the pans are filled, the unfilled steel tread pans are a slip and trip hazard and provide inadequate footing (the pan is a shallow tray, not a solid tread), so workers using pan stairs before the concrete is placed can slip or trip on the empty pans, which is why awareness, temporary protection, or sequencing the fill so the stairs are not used with empty pans matters. The concrete fill and the empty-pan condition before filling are the distinguishing pan-stair hazards.

The heavy-stair-rigging/fall-during-installation and the open-riser/welding are the other defining hazards, shared with the metal stairs AHA. On the projects I have run, pan-stair assemblies are heavy and are rigged and set into position between levels (rated rigging, controlled setting, crush awareness, exclusion below), the installation is at height (fall protection during installation), the open sides and risers are a fall hazard until railings are installed (promptly installing the stair railings and guards), and welding or bolting the stairs and cutting to fit are hot work and cut hazards. The safe use of the stairs for access (not using them with empty pans or without railings) rounds it out. The AHA built on concrete-fill/contact control and rigging/fall-protection safety is the one that protects the pan-stair crew.

The bottom line

A Metal Pan Stairs AHA names the concrete-fill-placement/caustic-contact, the heavy-stair-rigging/fall-during- installation, and the open-riser/welding hazards with specific controls — safe concrete-fill placement with caustic-contact protection and managing the empty-pan slip/trip hazard before filling, safe rigging and setting of the heavy stairs with fall protection during installation and prompt railings, and safe welding/cutting. The concrete-fill/contact control and the rigging/fall-protection safety are the defining concerns. The AHA that manages both is the one that protects the crew.

Frequently asked questions

What distinguishes the pan-stair concrete hazard?

The treads of pan stairs are formed as steel pans filled with concrete on site to form the finished tread surface, so the work includes placing concrete into the tread pans (concrete-placement and caustic-contact hazards — cement burns), and there is a distinct empty-pan hazard: before filling, the unfilled steel tread pans are a slip/trip hazard and provide inadequate footing (a shallow tray, not a solid tread). Controls are safe concrete-fill placement (caustic-contact protection — gloves, skin protection), managing the empty-pan hazard (awareness, temporary protection, or sequencing the fill so stairs are not used with empty pans), and the concrete/contact controls.

What rigging and fall hazards apply?

Pan-stair assemblies are heavy and rigged and set into position between levels, and the installation is at height. Controls are safe rigging and setting of the heavy pan-stair assemblies (rated rigging, controlled setting, crush awareness, exclusion below), fall protection during the installation, and the rigging/fall controls.

What open-riser and welding hazards apply?

The open sides and risers are a fall hazard until railings are installed, and welding/bolting the stairs and cutting to fit are hot work and cut hazards. Controls are promptly installing the stair railings/guards, safe welding/cutting (hot work, cutting to fit), and the open-riser/welding controls.

What is metal pan stairs?

Metal pan stairs is the installation of metal-pan stairs — steel stairs whose treads are formed as steel pans filled with concrete on site to form the finished tread surface. Because the concrete fill brings caustic contact and an empty-pan slip/inadequate-tread hazard, the heavy stairs are rigged and installed at height, and there are open risers/welding, those hazards apply.

Related AHAs and JHAs

• Metal Stairs AHA — the metal-stair fundamentals
• Metal Grating Stairs AHA — the grating-stair alternative
• Stair Installation JHA — the stair-installation fundamentals
• Handrail Installation JHA — the railing-installation 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.