Expert AC156 Seismic Certification Testing

AC156 Seismic Certification Testing evaluates whether nonstructural components and equipment can withstand simulated seismic demands. Testing typically uses vibration profiles applied through an electrodynamic shaker or seismic test setup, with monitoring for structural integrity, functionality, and mounting performance. The result is documented evidence that supports specification, installation, and compliance decisions.

AC156 testing is commonly used for equipment installed in critical buildings or projects where seismic performance must be documented. Typical candidates include electrical cabinets, control panels, mechanical equipment, data center systems, medical equipment, and other nonstructural components. Manufacturers often test early enough to make design or mounting improvements before production or project submittal deadlines.

B83 Testing & Engineering supports AC156 projects with engineering review, fixture considerations, vibration testing capability, data acquisition, and final documentation. The team can help define the test approach, accommodate unique product geometry, and provide data that supports quality decisions. Its ISO/IEC 17025 accreditation helps ensure testing is performed under recognized laboratory quality practices.

A successful test usually requires the equipment under test, intended mounting configuration, product drawings, weight and center-of-gravity information, operating requirements, and any project-specific seismic criteria. Providing these details early helps the lab design appropriate fixtures, confirm instrumentation needs, and align the test plan with the evidence required for certification or submittal packages.

The testing timeline depends on fixture complexity, equipment size, instrumentation requirements, and lab scheduling. Straightforward products may move quickly once drawings, mounting details, and acceptance criteria are confirmed. More complex assemblies may require additional planning for custom fixtures, functional monitoring, or design changes. B83 is known for flexible scheduling and accommodating changing client demands.

Yes. Custom fixtures are often essential because seismic testing must represent how the equipment will actually be mounted in service. B83 Testing & Engineering offers unique fixture design and custom test development capabilities, helping clients create practical setups that support realistic loading, repeatable results, and meaningful documentation for certification, quality assurance, or engineering review.

AC156 testing primarily addresses seismic qualification for nonstructural components, while general vibration testing evaluates durability, resonance, shipping, operating environments, or product fatigue. AC156 follows a defined seismic acceptance approach, including specified input motions and performance expectations. General vibration programs may be random, sine, or sine-on-random and are tailored to broader field or transportation conditions.

The report should clearly document the equipment tested, mounting configuration, test inputs, instrumentation, acceptance criteria, observations, and results. For engineering and project submittals, photographs, response data, and any functional checks are especially important. B83’s ISO/IEC 17025-accredited processes support accurate, traceable, and decision-ready documentation for manufacturers and project stakeholders.