The employer must have written evidence that a survey was performed, as stated by the Legal Information Institute.
Pre-demolition safety verification steps for accurate bids
When preparing a demolition bid, your liability hinges on verifying specific safety compliance points before mobilizing crews. The core of this verification is ensuring that the preparatory operations meet documented standards. According to the Legal Information Institute, the employer shall have in writing evidence that such a survey has been performed Legal Information Institute. This written requirement is not merely a bureaucratic formality; it is the foundational proof that the site has been assessed for hazards before work begins. Without this documented survey, you cannot confirm that the structural and environmental conditions are safe for your team.
For an estimator, this verification step directly impacts the accuracy of your bid. If you assume a survey has been done without written proof, you risk underestimating the time and cost required to remediate discovered hazards. The written evidence serves as the baseline for your scope of work. It defines what has already been checked and what remains to be addressed by your crew. By securing this documentation early, you align your project schedule with the actual state of the site. This prevents the need for last-minute changes that often lead to cost overruns and schedule delays.
Key takeaways for demolition safety checks before starting work
- Verify floor openings are covered with material substantial enough to support any imposed load, according to Legal Information Institute.
- Shore or brace walls and floors when working within structures damaged by fire, flood, or explosion, as stated by the Legal Information Institute.
- Determine if hazardous chemicals, gases, or explosives were used in pipes, tanks, or equipment on the property, according to the Legal Information Institute.
- Temporarily relocate and protect power, water, or other utilities that must be maintained during demolition, according to the Legal Information Institute.
- Retain written evidence that a survey has been performed, as required by the Legal Information Institute.
Structural integrity and shoring requirements
Before mobilizing a demolition crew, verify that the building’s structural components can support the planned work. The Legal Information Institute states that when employees must work within a structure to be demolished that has been damaged by fire, flood, explosion, or other cause, the walls or floor shall be shored or braced according to Legal Information Institute. This requirement applies specifically to structures with existing damage, not to every demolition project regardless of condition.
Floor openings present a distinct structural risk. The Legal Information Institute requires that all floor openings, not used as material drops, be covered over with material substantial enough to support the weight of any load which may be imposed according to Legal Information Institute. For openings cut specifically for material disposal, the California Department of Industrial Relations specifies that any openings cut in a floor for the disposal of materials shall be no larger in size than 25 percent of the aggregate of the total floor area, unless the lateral supports of the removed flooring remain in place as reported by California Department of Industrial Relations. The 25 percent cap applies unless the lateral supports of the removed flooring remain in place.
Wood framing often provides hidden structural support that estimators might overlook. The California Department of Industrial Relations notes that when wood floor beams serve to brace interior walls or free-standing exterior walls, such beams shall be left in place until other equivalent support can be installed to replace them as reported by California Department of Industrial Relations. Removing these beams before installing replacement support violates this requirement.
Survey findings must be addressed before work begins. The California Department of Industrial Relations mandates that prior to starting demolition operations, all structural or other hazardous deficiencies noted during the survey required by Section 1734(b)(1) shall be shored, braced or otherwise corrected as recommended in the survey according to California Department of Industrial Relations. This correction requirement is specific to deficiencies noted during the survey.
Shoring methods vary based on the specific structural deficiencies and damage history of the building. Do not assume a single shoring method works for all structure types. The requirement to shore or brace damaged walls or floors applies when damage from fire, flood, explosion, or other causes is present according to Legal Information Institute. The correction of survey-noted deficiencies follows the recommendations in that specific survey as stated by California Department of Industrial Relations.
Review the survey for the current project to confirm that all noted deficiencies have been shored or corrected before scheduling the crew.
A filled reference table of demolition safety rules
The table below lists the eight specific verification points required for demolition safety checks, drawing directly from the cited regulatory sources. Each row identifies the rule category, the publisher that states the requirement, and the specific value or action mandated. Use this list to confirm your bid scope includes the necessary labor and materials for compliance.
Verify that your project documentation aligns with these specific values before finalizing the bid.
Environmental and utility hazard controls
Before mobilizing crews, verify that active utility lines are secured and that hazardous substances in pipes, tanks, or other equipment are identified, with testing, purging, and elimination only when presence is apparent or suspected. The Legal Information Institute states, under 29 CFR 1926.850 preparatory operations, that if it is necessary to maintain any power, water or other utilities during demolition, such lines shall be temporarily relocated, as necessary, and protected Legal Information Institute. This requirement applies specifically when utilities must remain active during the demolition process, rather than being disconnected prior to work. Estimators should confirm whether the project scope includes maintaining live utilities, as this triggers the relocation and protection mandate.
The same source, the Legal Information Institute, requires that it be determined if any type of hazardous chemicals, gases, explosives, flammable materials, or similarly dangerous substances have been used in any pipes, tanks, or other equipment on the property Legal Information Institute. This determination is a preparatory operation that must occur before demolition starts. The scope covers not just visible tanks but also pipes and other equipment that may have historically contained dangerous materials.
When the presence of any such substances is apparent or suspected, the Legal Information Institute specifies that testing and purging shall be performed and the hazard eliminated before demolition is started Legal Information Institute. This rule links the identification step to a mandatory remediation action: if suspicion exists, testing and purging are required, and the hazard must be eliminated before work begins. It is not sufficient to merely identify the substance; the hazard must be removed.
For bid preparation, this means verifying two distinct protocols: utility line protection if lines remain active, and hazardous substance testing and purging if dangerous materials are suspected in on-site equipment. These are separate verification points that must be documented in the bid to avoid liability. The utility protection rule applies to power, water, and other utilities that must be maintained during demolition. The hazardous substance rule applies to chemicals, gases, explosives, flammable materials, or similarly dangerous substances that have been used in pipes, tanks, or other equipment on the property.
Documentation and survey evidence requirements
The employer shall have in writing evidence that such a survey has been performed, according to Legal Information Institute. This requirement applies specifically to the preparatory operations in 29 CFR 1926.850. Verbal confirmation from a contractor or engineer does not satisfy this condition. The written evidence must explicitly state that the survey has been completed.
When preparing a demolition bid, the estimator must verify that this written documentation exists before scheduling the crew. The absence of this specific written record creates a compliance gap that cannot be resolved through informal site meetings. The document must address the particular building’s structural condition.
The written evidence serves as the primary record for the preparatory phase. It confirms that the survey has been performed. The estimator should request a copy of this written evidence during the bid verification process. This allows the site manager to confirm that the required survey has actually been performed.
The scope of this requirement is limited to the specific context of the cited regulation. It does not imply that every demolition project in every jurisdiction requires identical documentation formats. However, the specific rule cited here mandates written evidence. The estimator should not assume that a verbal report constitutes "in writing evidence" as defined by the source. The document must be a tangible record that can be produced if requested.
The Legal Information Institute states that the employer shall have in writing evidence that such a survey has been performed, as noted in Legal Information Institute.
If a row remains "Not Verified," do not schedule the crew for that task. This checklist helps you track the written evidence needed for compliance, particularly for the survey documentation requirement. Keep the completed checklist with your bid records to demonstrate that safety compliance was verified before work began.
Related guides
FAQ: Demolition safety checks before starting work
What is the maximum size for floor openings during demolition?
According to the California Department of Industrial Relations, any openings cut in a floor for the disposal of materials shall be no larger in size than 25 percent of the aggregate of the total floor area. This limit applies unless the lateral supports of the removed flooring remain in place.
How wide must canopies be over building entrances?
The California Department of Industrial Relations states that canopies shall be at least two feet wider than the building entrances or openings. This requirement specifies one foot wider on each side of the entrance.
What must be done if hazardous chemicals are suspected in pipes?
When the presence of hazardous substances is apparent or suspected, testing and purging shall be performed, according to the Legal Information Institute. The hazard must be eliminated before demolition is started.
What height must exterior wall openings be protected to?
Exterior wall openings on all floors shall be protected to a height of not less than 42 inches, as stated by the California Department of Industrial Relations. This requirement does not apply to the ground floor or the floor being demolished.
What evidence is required to show a survey was performed?
Verbal confirmation is not sufficient; written documentation is required.