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MIL-STD-810H Method 516.8: Shock Testing

 

MIL-STD-810H Method 516.8: Shock Testing

Last reviewed: August 2026

MIL-STD-810H Method 516.8 addresses mechanically induced shock and is used to evaluate whether equipment can physically and functionally withstand shock events anticipated during handling, transportation and operational service.

Shock events can occur in fractions of a second but place significant mechanical stress on electronics, chassis structures, circuit boards, connectors, storage devices, mounting hardware and other components. For rugged computing equipment deployed in military vehicles, aircraft, mobile systems and other demanding environments, understanding how a system responds to shock can be an important part of environmental qualification.

MIL-STD-810H emphasizes that environmental tailoring is essential. Method 516.8 does not establish one universal shock level that every product must pass. The applicable procedure, shock magnitude, duration, waveform, number of events, test axes and equipment configuration should reflect the environment the equipment is expected to encounter during its service life.

Looking for the previous revision? MIL-STD-810G addresses shock under Method 516.6.  MIL-STD-810H Method 516.8 is the newer shock test method and includes significant revisions to testing and data-processing guidance.

What is MIL-STD-810H Method 516.8?

MIL-STD-810H Method 516.8 is the shock test method within the U.S. Department of Defense’s MIL-STD-810 Environmental Engineering Considerations and Laboratory Tests standard.

According to the method, shock testing is used to:

  • Provide confidence that equipment can physically and functionally withstand shocks encountered during handling, transportation and service.
  • Determine an item’s fragility so that packaging, stowage or mounting systems can be designed to protect it.
  • Evaluate mounting and restraint systems associated with platforms that could experience a crash.
  • Determine whether equipment or its components could become a safety hazard during a crash event.

The current DoD publication is MIL-STD-810H with Change 1, dated May 18, 2022. The Defense Logistics Agency lists it as the active revision of MIL-STD-810.

What types of shock does Method 516.8 address?

Method 516.8 applies to equipment expected to experience mechanically induced shocks during its life cycle.

The standard describes these environments as generally having durations of no more than one second and frequency content not exceeding 10,000 Hz. In most cases, significant equipment response occurs below 4,000 Hz and for less than 0.1 second.

Examples of potential shock environments include:

  • Sudden impacts during operation
  • Shock transmitted through a ground or air vehicle
  • Transportation over irregular surfaces
  • Drops during transport or field handling
  • Maintenance and bench-handling impacts
  • Vehicle or aircraft crash loads
  • Aircraft catapult launches and arrested landings

Method 516.8 is not intended to cover every type of shock. Specialized environments such as pyroshock, ballistic shock, gunfire shock and high-impact shipboard shock are addressed by other methods or standards.

The eight MIL-STD-810H Method 516.8 procedures

Method 516.8 contains eight separate shock procedures. Selecting the appropriate procedure is based on how the equipment will be transported, installed, handled and operated during its anticipated life cycle.

Procedure I – Functional Shock

Functional Shock evaluates whether equipment can maintain its required physical integrity, continuity and functionality when exposed to shocks representative of operational service.

This procedure is especially relevant to rugged computing equipment because visible physical damage is not the only concern. A shock can potentially cause a temporary power interruption, connector failure, circuit-board problem, data disruption or other functional issue even when the enclosure remains intact.

The equipment is generally tested in its functional configuration, outside of its transit packaging.

For systems intended to operate on aircraft, military ground vehicles or other mobile platforms, Procedure I can provide important information about whether the complete system will continue operating through its specified mechanical environment.

Procedure II – Transportation Shock

Transportation Shock evaluates equipment and restraint systems exposed to the repetitive shock loads associated with transportation.

Ground vehicle transportation is one common source of these shock events. Roads, rough terrain, vehicle suspension characteristics, equipment mounting and cargo restraint systems can produce repeated mechanical shocks in addition to vibration.

The standard provides default transportation shock criteria when representative measured data are unavailable, but it makes clear that field data should be used to tailor testing when appropriate. It also notes that Transportation Shock should be considered together with applicable ground-transportation vibration testing under Method 514.8. (CVG Strategy)

This is an important difference from older MIL-STD-810G Method 516.6 guidance. Under Method 516.6, Procedure II was titled “Materiel to Be Packaged.” Method 516.8 instead uses Procedure II for Transportation Shock, making this one of the clearest differences between the two shock methods.

Procedure III – Fragility

Fragility testing helps determine the shock conditions at which equipment begins to experience structural or operational degradation.

The resulting fragility information can be used during product development or to design:

  • Protective packaging
  • Shock isolation
  • Equipment mounts
  • Transportation systems
  • Stowage configurations

Rather than simply testing against one predetermined pass/fail level, fragility testing can progressively increase the shock input to identify the equipment’s critical threshold.

This information can be valuable when engineers need to decide whether protection should come from changes to the equipment itself or from an external mounting, packaging or isolation system.

Procedure IV – Transit Drop

Transit Drop evaluates how equipment responds to physical drops that may occur during transportation, handling or field use.

Depending on the application, equipment may be tested:

  • Inside a transit case
  • Inside a combination case
  • Outside its packaging
  • In a configuration representative of field use

Drop height, number of drops, equipment weight, orientation and packaging configuration are among the variables that can affect the appropriate test.

A common misconception is that “MIL-STD-810 shock testing” simply means dropping a product. Transit Drop is only one of eight procedures within Method 516.8.

Procedure V – Crash Hazard Shock

Crash Hazard Shock evaluates the structural integrity of equipment and the systems used to attach it to a vehicle or aircraft.

The primary concern is safety.

During a survivable crash, equipment mounts, fasteners, rails, brackets and restraint systems must be capable of preventing installed equipment or its components from becoming additional hazards.

For rack-mounted or vehicle-mounted rugged computing equipment, this can make the mounting system just as important as the computer enclosure itself.

The standard provides separate default shock criteria for flight and ground equipment when appropriate measured environmental data are unavailable. These are reference criteria rather than universal test requirements.

Procedure VI – Bench Handling

Bench Handling evaluates the types of shocks equipment may encounter during maintenance, repair, servicing or routine handling.

Equipment that is highly rugged when installed in its operational mount can still be vulnerable when removed from that installation.

Procedure VI can account for impacts associated with equipment being:

  • Set down
  • Tipped
  • Dropped
  • Repositioned
  • Handled during maintenance or repair

The procedure is generally intended for unpackaged, non-operating equipment.

Procedure VII – Pendulum Impact

Pendulum Impact is intended primarily for large shipping containers and packaged equipment that may experience horizontal impacts during transportation and handling.

It evaluates both the container itself and the ability of the packaging system to protect its contents.

This procedure can be appropriate when the size or weight of a container makes conventional drop testing impractical.

Procedure VIII – Catapult Launch/Arrested Landing

Catapult Launch/Arrested Landing addresses equipment mounted in or on fixed-wing aircraft exposed to the unique dynamic events associated with carrier operations.

A catapult launch can create an initial shock followed by transient vibration, while an arrested landing produces rapid deceleration and associated structural response.

Method 516.8 places particular importance on measured aircraft data when defining these environments because actual equipment response can be influenced by factors such as aircraft structure, installation location, mounting interfaces and structural damping.

Why environmental tailoring is essential

One of the most important concepts in MIL-STD-810H is tailoring.

MIL-STD-810H is not intended to impose one design specification or one universal laboratory test on every product. The DoD describes the standard as an environmental engineering and test methodology in which test conditions are developed based on the environmental stresses equipment is expected to encounter throughout its service life.

For Method 516.8, appropriate test parameters can include:

  • Shock magnitude
  • Pulse duration
  • Shock waveform
  • Frequency content
  • Number of shocks
  • Direction of loading
  • Equipment orientation
  • Mounting configuration
  • Operational or non-operational state
  • Temperature during testing
  • Packaging configuration

Whenever reliable field or platform data are available, those data can provide a stronger basis for establishing the test environment than a generic shock value.

This is why the statement “tested to MIL-STD-810H” by itself is incomplete. A meaningful environmental specification should identify the applicable method, procedure and test conditions.

Understanding G-force and shock duration

Mechanical shock specifications are often expressed using G-force and milliseconds.

For example:

20G, 11 ms

indicates a shock involving a peak acceleration level related to 20 times gravitational acceleration and a pulse duration measured in milliseconds.

However, those two numbers alone do not fully describe the mechanical effect on a piece of equipment.

Shock severity can also depend on:

  • Pulse shape
  • Velocity change
  • Frequency content
  • Equipment natural frequencies
  • Direction of impact
  • Number of events
  • Mounting characteristics
  • Structural damping

Two shock events with the same peak G level can produce different equipment responses if their duration, waveform or frequency content is different.

That is one reason Method 516.8 makes extensive use of Shock Response Spectrum analysis in addition to classical shock pulses.

What is a Shock Response Spectrum (SRS)?

A Shock Response Spectrum, or SRS, is a way of describing how systems with different natural frequencies would respond to the same shock event.

Instead of looking only at peak acceleration, SRS analysis evaluates the maximum response of a series of theoretical single-degree-of-freedom systems across a range of natural frequencies.

This matters because equipment does not necessarily respond most severely at the instant the highest acceleration is measured. Components, chassis structures, circuit boards and mounting systems have their own resonant characteristics.

A shock containing significant energy near one of those natural frequencies can create an amplified response.

MIL-STD-810H Method 516.8 uses SRS analysis extensively for defining and evaluating shock environments. Unless otherwise specified, the method identifies a default Q value of 10, corresponding to 5% critical damping, for SRS processing and provides detailed measurement and data-processing guidance in its annexes.

For engineers, SRS can therefore provide a more useful description of a complex shock environment than peak G-force alone.

Classical shock pulses in Method 516.8

Not every qualification requires reproduction of an actual measured shock waveform.

Method 516.8 also provides guidance for several classical laboratory shock pulse shapes, including:

Terminal peak sawtooth: Used as an option in Functional Shock, Transportation Shock and Crash Hazard testing.

Trapezoidal pulse: Used in Fragility testing.

Half-sine pulse: Used for certain applications, including specified High Speed Craft Functional Shock conditions, and may be used in other situations when appropriate to the test requirement and equipment capabilities.

The correct waveform depends on the applicable procedure, available environmental data, laboratory capabilities and test plan.

Does Method 516.8 require 20G or 40G shock testing?

No. There is no single G-force requirement that applies to every MIL-STD-810H Method 516.8 test.

Method 516.8 does contain default reference criteria that can be used in certain situations when measured environmental data are unavailable.

For example, the standard includes default Functional Shock criteria associated with flight equipment and ground equipment and separate criteria for Crash Hazard Shock.

Those values should not be interpreted as a blanket requirement for every product claiming testing to Method 516.8.

A product specification such as:

MIL-STD-810, Method 516, Procedures I/V — 20G, 11 ms functional shock; 40G, 11 ms crash hazard shock

describes a particular environmental qualification rather than the definition of Method 516 itself.

Crystal Group, for example, publishes those shock levels for specific rugged computing and networking configurations.

The appropriate requirement ultimately depends on the platform, installation, expected environment and applicable program or contract.

How many shocks are required?

There is not one universal number.

Method 516.8 states that the test axes and number of shock exposures should generally be determined from the equipment’s life-cycle environmental profile.

As a baseline, test conditions should account for both directions along each of three orthogonal axes when applicable.

For equipment expected to experience a shock event only rarely, the guidance can call for a minimum of one shock in each direction of each axis. When shocks are expected more frequently and representative data are unavailable, the method provides guidance for applying at least three shocks in each direction of each axis. High-energy or safety-related tests may require a different approach.

As with acceleration and duration, the number of test events should be tied to the anticipated service environment rather than treated as a universal certification requirement.

Shock testing vs. vibration testing

Shock and vibration both create dynamic mechanical loads, but they represent different types of environmental stress.

Shock generally involves a sudden, short-duration transfer of mechanical energy.

Vibration involves repetitive or sustained oscillatory motion.

Examples of shock can include a vehicle impact, equipment drop or sudden deceleration. Examples of vibration can include continuous operation in a tracked vehicle, aircraft, ship or other moving platform.

Within MIL-STD-810H:

  • Method 516.8 addresses Shock
  • Method 514.8 addresses Vibration

The two tests should not be viewed as interchangeable. Method 516.8 specifically notes that Transportation Shock may need to be performed in conjunction with applicable ground-transportation vibration testing.

Method 516.8 vs. MIL-DTL-901 shipboard shock testing

MIL-STD-810H Method 516.8 should also not be confused with MIL-DTL-901, which addresses high-impact shock testing of shipboard machinery, equipment, systems and structures.

Method 516.8 specifically identifies high-impact shock experienced aboard a ship because of wartime service as outside its scope and points users toward MIL-DTL-901 for that environment.

That distinction is particularly relevant when specifying rugged computing equipment for naval applications.

A system tested to Method 516.8 has not automatically demonstrated compliance with MIL-DTL-901, and MIL-DTL-901 testing should not simply be represented as another Method 516.8 procedure.

MIL-STD-810H Method 516.8 vs. MIL-STD-810G Method 516.6

MIL-STD-810H superseded MIL-STD-810G with Change 1. The current DoD record identifies MIL-STD-810H w/Change 1 as the active revision.

For shock testing:

MIL-STD-810G → Method 516.6

MIL-STD-810H → Method 516.8

The underlying goal remains evaluating equipment against the mechanically induced shocks expected during its life cycle, but Method 516.8 contains substantial revisions and updated technical guidance.

One of the most visible changes is Procedure II:

  • Method 516.6: Procedure II – Materiel to Be Packaged
  • Method 516.8: Procedure II – Transportation Shock

Method 516.8 also provides expanded treatment of measured shock environments, SRS-based testing, waveform replication, test tolerances, shock data acquisition and statistical processing. Its supporting annexes include detailed guidance on measurement-system characterization, processing shock time histories and developing statistically based limits from measured data. The standard itself notes that Method 516.8 was extensively revised.

Programs and contracts that specify MIL-STD-810G Method 516.6 may continue to require testing against that revision. New requirements should be evaluated against the revision specifically identified by the program rather than automatically substituting one revision for another.

Learn more: [Internal link to “MIL-STD-810G Method 516.6 Shock Testing.”]

What can mechanical shock do to a rugged computer?

A rugged computer is a system of interconnected electrical and mechanical components. A severe shock can affect the system in ways that are not immediately visible from the outside.

Potential failure points include:

Chassis and structural components

Shock loading can create temporary or permanent deformation in chassis structures, brackets, rails and internal supports.

A rugged enclosure should maintain mechanical integrity while supporting internal components throughout the specified shock environment.

Printed circuit boards

Circuit boards can flex during a shock event. Excessive deflection can contribute to component, solder-joint or board damage.

Connectors and cabling

Mechanical motion can affect internal and external connections, particularly when connectors or cable assemblies are not adequately secured.

Even a momentary interruption can matter in a mission-critical computing application.

Storage devices

Storage devices and their mounting systems must withstand the specified shock environment without mechanical failure or data interruption.

Solid-state storage eliminates some vulnerabilities associated with rotating media, but drives, connectors and mounting hardware remain part of the complete mechanical system.

GPUs, processors and expansion cards

Modern rugged computing systems can contain relatively large and heavy components. Their mass can generate significant loads at attachment points when subjected to high acceleration.

Retention systems and chassis structures therefore become important parts of the environmental design.

Power supplies and removable components

Power supplies, removable drive carriers and other replaceable components require positive retention and mechanically secure electrical connections.

Rack and vehicle mounting

Environmental qualification does not stop at the computer enclosure.

Rails, brackets, shock mounts, fasteners and vehicle attachment points can affect how mechanical energy is transferred into the system.

That makes representative mounting configuration particularly important when evaluating rugged computers for shock resistance.

Why shock testing matters for mission-critical computing

Commercial computer hardware is normally designed around relatively controlled operating environments.

Military and industrial computing equipment can instead be installed in:

  • Ground vehicles
  • Aircraft
  • Mobile command systems
  • Autonomous platforms
  • Surveillance systems
  • Industrial machinery
  • Transportable communications systems
  • Edge computing deployments

In these applications, unexpected motion or impact can interrupt a mission even when equipment does not suffer obvious physical damage.

A rugged computing system therefore needs to be evaluated not only for whether its enclosure survives, but for whether it continues to perform the functions required by the application.

That distinction is central to Procedure I – Functional Shock.

MIL-STD-810H shock testing and Crystal Group rugged computers

Crystal Group designs rugged servers, embedded computers, networking systems, data storage solutions and other computing platforms for demanding defense, aerospace and industrial applications.

Environmental requirements vary by product and configuration. Current Crystal Group product specifications include systems tested to MIL-STD-810 Method 516 shock requirements, including Functional Shock and Crash Hazard Shock conditions.

When evaluating equipment for a specific application, it is important to verify:

  • The MIL-STD-810 revision
  • Applicable method and procedure
  • Shock magnitude and duration
  • Waveform or SRS requirement
  • Test directions
  • Number of events
  • Operational state
  • Mounting configuration
  • System options installed during qualification

Because Crystal Group systems can be highly configurable, contact Crystal Group to determine the environmental qualification applicable to the exact system configuration being considered.

Questions to ask when specifying MIL-STD-810H Method 516.8

A generic claim such as “MIL-STD-810H tested” does not provide enough information to evaluate shock performance.

When comparing rugged computing systems, consider asking:

  • Was the product tested specifically to Method 516.8?
  • Which procedure or procedures were performed?
  • Which revision and change level of MIL-STD-810 was used?
  • What shock levels and durations were applied?
  • Were classical shock pulses or an SRS-based profile used?
  • Was the equipment operating during testing?
  • What equipment configuration was tested?
  • How was the system mounted?
  • Were all three orthogonal axes evaluated?
  • What constituted a test failure?
  • Is qualification documentation available?
  • Does the tested configuration match the configuration being purchased?

Those details provide substantially more engineering value than a generic “military-grade” or “MIL-STD tested” statement.

Frequently asked questions about MIL-STD-810H Method 516.8

What is the current MIL-STD-810 shock test method?

The current shock method is MIL-STD-810H Method 516.8. The active DoD publication is MIL-STD-810H with Change 1, dated May 18, 2022.

What did Method 516.8 replace?

MIL-STD-810H Method 516.8 superseded the shock testing guidance contained in earlier MIL-STD-810 revisions, including MIL-STD-810G Method 516.6.

Is MIL-STD-810H Method 516.8 a drop test?

Not exclusively. Transit Drop is Procedure IV. Method 516.8 contains eight procedures covering Functional Shock, Transportation Shock, Fragility, Transit Drop, Crash Hazard Shock, Bench Handling, Pendulum Impact and Catapult Launch/Arrested Landing.

Is there one required G-force for Method 516.8?

No. MIL-STD-810H emphasizes environmental tailoring. Test levels should be based on the applicable procedure and the environment the equipment is expected to experience.

What is the difference between Method 516.8 and Method 514.8?

Method 516.8 addresses mechanical shock, while Method 514.8 addresses vibration. A product may need to withstand both environments, and testing to one method does not automatically demonstrate performance against the other.

What is Functional Shock?

Procedure I – Functional Shock evaluates equipment in its functional configuration to determine whether it maintains required physical integrity, continuity and functionality when exposed to representative operational shock.

What is Crash Hazard Shock?

Procedure V evaluates equipment and its mounting or restraint system to determine whether they remain structurally safe during specified crash loads. Preventing equipment or components from becoming hazards is a primary concern.

What is SRS in shock testing?

SRS stands for Shock Response Spectrum. It describes how systems with different natural frequencies respond to a shock event and can provide more useful information about shock severity than peak acceleration alone.

Does passing Method 516.8 mean a product is “MIL-STD-810H certified”?

MIL-STD-810H is more accurately described as a test method standard than as one universal product certification. The meaningful qualification is the specific revision, method, procedure, test level and configuration that were evaluated.

Does Method 516.8 cover shipboard high-impact shock?

No. Method 516.8 specifically directs high-impact shipboard shock associated with wartime service to MIL-DTL-901.

Need a rugged computing solution for a high-shock environment?

Crystal Group engineers rugged computing solutions for defense, aerospace, industrial and edge applications where shock, vibration, temperature and other environmental stresses can affect system reliability.

Contact Crystal Group to discuss your platform, environmental requirements, mounting configuration and applicable MIL-STD-810 qualification needs.

References

1. U.S. Department of Defense, MIL-STD-810H w/Change 1 – Environmental Engineering Considerations and Laboratory Tests. Revision H, Change 1 incorporated, May 18, 2022. Defense Logistics Agency ASSIST Quick Search identifies this as the active MIL-STD-810 publication.
MIL-STD-810 official document record – DLA ASSIST

2. U.S. Department of Defense, MIL-STD-810H Method 516.8 – Shock. Covers the purpose, application, limitations, tailoring guidance, eight test procedures, test controls, shock response spectrum analysis, measurement and data processing used in Method 516.8. (CVG Strategy)

3. U.S. Department of Defense, MIL-STD-810G Method 516.6 – Shock. Previous revision of the shock method and useful reference when comparing legacy Method 516.6 requirements with Method 516.8.

4. Crystal Group product environmental specifications. Crystal Group publishes Method 516 Functional Shock and Crash Hazard Shock qualification information for applicable rugged computing and networking products and configurations.