Selective Building Demolition AHA (Activity Hazard Analysis / Job Hazard Analysis)

Updated 2026-06-23

A Selective Building Demolition AHA (Activity Hazard Analysis / Job Hazard Analysis) is the plan that keeps the crew performing selective building demolition safe in the load-bearing-element removal and stability, around the occupied building and adjacent operations, and among the hidden utilities and hazmat. Selective building demolition removes parts of a building while the rest remains in service — combining the load-bearing-element- removal and stability hazard, the occupied-building and adjacent-operations hazard, and the hidden-utilities and hazmat hazard. This guide walks through building a Selective Building Demolition AHA that names the load-bearing-element/stability, occupied-building/adjacent-operations, and hidden-utilities/hazmat hazards and assigns the stability, occupancy, and hidden-condition controls that hold up in the field.

Why selective building demolition needs its own AHA

Selective building demolition is the removal of specific parts of a building — floors, walls, sections, or elements — while the rest of the building remains standing and often occupied or in service, as part of renovation, reconfiguration, or partial demolition. The defining feature is that it is demolition within a building that must keep standing (and often stay occupied), so the building's structural stability, the occupancy and adjacent operations, and the hidden building systems are central. The hazards combine the load-bearing-element-removal and stability (removing floors, walls, or elements from a standing building — the hazard of removing load-bearing elements and compromising the building's stability (partial/progressive collapse), requiring engineering and shoring), the occupied-building and adjacent-operations (the building often remains occupied or in service during the selective demolition — protecting occupants and adjacent operations (from the demolition, dust, noise, and any instability)), the hidden-utilities and hazmat (the building's concealed utilities (active building systems) and hazardous materials (asbestos, lead in older buildings)), and the dust-noise-vibration-in-occupied-building. The load-bearing-element/stability and the occupied-building/ adjacent-operations justify a dedicated AHA.

Breaking selective building demolition into steps

The steps for a Selective Building Demolition AHA follow the demolition:

• Engineer the removal (load-bearing analysis, shoring)
• Survey for hidden utilities and hazmat; abate hazmat
• Protect occupants and adjacent operations
• Shore and support before removing structural elements
• Remove the elements (controlled, sequenced)
• Manage the stability, occupancy, and hidden hazards
• Manage dust/noise in the occupied building
• Complete

Each step carries a hazard, and the load-bearing-element/stability, the occupied-building/adjacent-operations, and the hidden-utilities/hazmat are where the most significant risks concentrate.

The hazards step by step

Load-bearing-element-removal and stability

Removing floors, walls, or elements from a standing building — the hazard of removing load-bearing elements and compromising the building's stability (partial/progressive collapse), requiring engineering and shoring. The controls are an engineering analysis of the building's structure and load paths (identifying load-bearing elements, what needs shoring), shoring and temporary support before removing load-bearing elements, a sequence that maintains building stability, and the stability controls. The load-bearing-element/stability is the primary defining hazard — removing load-bearing elements can collapse the building. (These follow the structural- demolition fundamentals.)

Occupied-building and adjacent-operations

The building often remains occupied or in service during the selective demolition — protecting occupants and adjacent operations (from the demolition, dust, noise, and any instability). The controls are protecting occupants and adjacent operations (separation/isolation of the demolition area from occupied areas, coordinating with building operations, protecting occupants from any hazard), containing the demolition's effects (dust, noise, debris) from occupied areas, and the occupancy controls. The occupied-building/adjacent-operations is a defining hazard — the building is often occupied during selective demolition. (These follow the occupied-building fundamentals.)

Hidden-utilities and hazmat

The building's concealed utilities (active building systems) and hazardous materials (asbestos, lead in older buildings). The controls are surveying for and isolating concealed active utilities (the building's live systems run in walls, floors, ceilings), a hazardous-materials survey and abatement before demolition (asbestos and lead in older buildings), and the hidden-utilities/hazmat controls. The hidden-utilities/hazmat is a defining hazard. (These follow the existing-conditions and hazmat fundamentals.)

Dust-noise-vibration-in-occupied-building

The dust, noise, and vibration in an occupied building carries the dust/noise/vibration hazard. The controls are dust control and containment (protecting occupants), noise and vibration management, and the dust/noise controls. (These follow the silica and occupied-space fundamentals.)

A simple Selective Building Demolition AHA structure

Building-stability control and occupant/operations protection

A Selective Building Demolition AHA centers on building-stability control and occupant/operations protection. The building-stability control addresses removing load-bearing elements from a standing building — controlled by an engineering analysis of the building's structure and load paths, shoring and temporary support before removing load-bearing elements, and a sequence that maintains building stability. The occupant/operations protection addresses the occupied building — controlled by protecting occupants and adjacent operations (separation/ isolation of the demolition area, coordinating with building operations) and containing the demolition's effects (dust, noise, debris) from occupied areas. And the hidden utilities and hazmat get survey/isolation/abatement controls. An AHA built on building-stability control and occupant/operations protection, with hidden-condition controls, addresses the hazards that define selective building demolition.

From the field: what actually goes wrong

In fourteen years across federal, heavy civil, and industrial projects, selective building demolition removes parts of a building while the rest keeps standing and often stays occupied, which sharpens two hazards beyond general selective demolition: the building's structural stability, and the occupants who are still in it. The load-bearing-element-removal and stability hazard is the primary defining concern — removing floors, walls, or elements from a standing building risks removing load-bearing elements and compromising the building's overall stability, which can cause partial or progressive collapse of the building. So an engineering analysis of the building's structure and load paths (identifying which elements are load-bearing and what needs shoring), shoring and temporary support before removing load-bearing elements, and a sequence that maintains building stability are the controls. A building has a specific structural system, and removing the wrong part of it can bring down more than intended, so the engineering has to come first.

The occupied-building/adjacent-operations and the hidden-utilities/hazmat are the other defining hazards, and the occupancy is what distinguishes building selective demolition. On the projects I have run, the building often remains occupied or in service during the selective demolition — people are still working, living, or operating in the parts of the building that are not being demolished — so protecting those occupants and adjacent operations is a central concern: separating and isolating the demolition area from the occupied areas, coordinating with building operations, protecting occupants from any hazard (including instability), and containing the demolition's effects (dust, noise, and debris) from the occupied areas. Doing demolition in a building full of people who are not part of the project raises the stakes on containment and isolation. The hidden-utilities and hazmat hazard is the building's concealed active utilities (live building systems in walls, floors, and ceilings that must be found and isolated) and hazardous materials (asbestos and lead in older buildings, surveyed and abated before demolition). The dust, noise, and vibration in the occupied building round it out. The AHA built on building-stability control and occupant/operations protection is the one that protects the selective-building-demolition crew and the occupants.

The bottom line

A Selective Building Demolition AHA names the load-bearing-element/stability, the occupied-building/adjacent- operations, and the hidden-utilities/hazmat hazards with specific controls — engineering analysis and shoring to maintain building stability when removing load-bearing elements, protecting and isolating occupants and adjacent operations (the building is often occupied), and surveying/isolating concealed utilities with hazmat abatement. The building-stability control and the occupant/operations protection are the defining concerns. The AHA that manages both is the one that protects the crew and occupants.

Frequently asked questions

Why is load-bearing-element removal the primary hazard?

Removing floors, walls, or elements from a standing building risks removing load-bearing elements and compromising the building's overall stability, which can cause partial or progressive collapse — and a building has a specific structural system where removing the wrong part can bring down more than intended. Controls are an engineering analysis of the building's structure and load paths (identifying load-bearing elements, what needs shoring), shoring and temporary support before removing load-bearing elements, a sequence that maintains building stability, and the stability controls.

Why does occupancy raise the stakes?

The building often remains occupied or in service during the selective demolition — people are still working, living, or operating in the parts not being demolished — so protecting those occupants and adjacent operations is central, and doing demolition in a building full of people not part of the project raises the stakes on containment and isolation. Controls are protecting occupants and adjacent operations (separation/isolation of the demolition area, coordinating with building operations, protecting from any hazard), containing the demolition's effects (dust, noise, debris) from occupied areas, and the occupancy controls.

What hidden utilities and hazmat apply?

The building's concealed active utilities (live building systems in walls, floors, ceilings) must be found and isolated, and hazardous materials (asbestos, lead in older buildings) must be surveyed and abated before demolition. Controls are surveying for and isolating concealed active utilities, a hazardous-materials survey and abatement before demolition, and the hidden-utilities/hazmat controls.

What is selective building demolition?

Selective building demolition is the removal of specific parts of a building — floors, walls, sections, or elements — while the rest of the building remains standing and often occupied or in service, as part of renovation, reconfiguration, or partial demolition. Because it must maintain building stability when removing load-bearing elements, protect occupants and adjacent operations, and deal with hidden utilities and hazmat, those hazards apply.

Related AHAs and JHAs

• Selective Demolition AHA — the broader selective demolition
• Selective Interior Demolition AHA — the interior selective demolition
• Building Demolition AHA — the full building demolition
• Demolition Work JHA — the demolition 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.