Simple Ways to Improve Outrigger and Crane Mat Performance on Hard Ground

August 6, 2026

General Information, Ground Conditions, News, Uncategorized

Maximizing Stability, Safety, and Equipment Longevity

Crane and outrigger mats play a critical role in maintaining stability and distributing loads during lifting operations. While many assume hard ground conditions eliminate the need for careful ground protection planning, surfaces such as compacted gravel, concrete, asphalt, and rocky terrain can still create challenges that impact crane performance and jobsite safety.

Understanding how to optimize outrigger and crane mat performance on hard ground can help reduce equipment wear, improve load distribution, and minimize the risk of costly ground failures.

Understand Ground Conditions Before Setup

Hard ground does not always mean strong ground. A surface may appear solid while concealing voids, utility trenches, frost pockets, or poorly compacted fill beneath it.

Before positioning a crane, conduct a thorough site assessment that considers:

• Surface composition
• Soil conditions beneath the hard surface
• Underground utilities and structures
• Drainage patterns
• Existing cracks or signs of deterioration

Identifying potential weaknesses early allows operators to select the appropriate mat size and configuration before lifting begins.

Select the Right Mat Size

One of the simplest ways to improve performance is choosing a mat that adequately distributes the crane’s outrigger loads. Undersized mats can concentrate forces in a small area, increasing the likelihood of surface damage or localized failure.

Larger mats spread loads across a wider footprint, reducing ground pressure and enhancing overall stability. Load calculations should always account for the crane configuration, anticipated lift weights, and site-specific conditions.

Ensure Proper Mat Placement

Even the highest-quality crane mat can underperform if installed incorrectly.

When positioning mats:

• Place them on clean, level surfaces
• Remove loose debris and rocks
• Ensure full contact between the mat and the ground
• Avoid gaps or unsupported corners
• Align mats perpendicular to outrigger loads when appropriate

Proper placement helps maximize load transfer and minimizes stress concentrations that can compromise stability.

Maintain Level Crane Setup

A level crane is essential for safe lifting operations. Uneven setups can place excessive loads on individual outriggers, increasing the risk of mat displacement or ground failure.

Before lifting:

• Verify crane leveling using onboard indicators
• Recheck level conditions after extending outriggers
• Inspect mats for shifting or settlement
• Monitor the setup throughout the project

Regular verification helps maintain optimal performance and reduces unnecessary strain on both the crane and supporting mats.

Inspect Mats Regularly

Routine inspections can significantly extend the service life of outrigger and crane mats.

Look for:

• Cracks or structural damage
• Excessive wear
• Delamination in composite materials
• Broken connections or hardware
• Surface deformation

Damaged mats may not distribute loads effectively, potentially compromising jobsite safety. Replacing or repairing worn mats before they fail can prevent costly downtime and equipment damage.

Keep Mats Clean and Dry

Hard ground surfaces often accumulate dirt, oil, mud, and other contaminants that can reduce friction between the mat and the ground.

To improve performance:

• Remove debris before installation
• Clean mats regularly
• Address oil or chemical spills promptly
• Store mats in dry conditions when not in use

A clean contact surface promotes better stability and helps prevent unwanted movement during lifting operations.

Use Multiple Mats When Necessary

For extremely heavy lifts or challenging ground conditions, a single mat may not provide sufficient load distribution.

Layering or combining mats in accordance with engineering recommendations can help:

• Increase bearing area
• Improve stability
• Reduce surface stress
• Protect vulnerable pavement or concrete surfaces

Always follow manufacturer guidelines and site-specific engineering requirements when stacking or combining mats.

Protect Hard Surfaces from Damage

Concrete and asphalt surfaces can crack or deteriorate under concentrated outrigger loads. Proper mat selection not only supports crane stability but also protects valuable infrastructure.

Using appropriately sized mats can help:

• Prevent pavement cracking
• Reduce repair costs
• Minimize project delays
• Preserve site conditions for future operations

This is especially important on commercial properties, industrial facilities, and municipal infrastructure projects.

Monitor Weather and Environmental Conditions

Weather can significantly influence mat performance, even on hard ground. Heavy rainfall, freeze-thaw cycles, and prolonged heat exposure may weaken underlying soils or affect surface integrity.

Regularly assess changing site conditions and adjust support strategies as needed. Continuous monitoring helps ensure lifting operations remain safe throughout the project duration.

Hard ground conditions can create a false sense of security during crane operations. While surfaces may appear stable, underlying conditions and concentrated outrigger loads still require careful planning and support.

By selecting the right mat size, ensuring proper placement, maintaining level setups, conducting routine inspections, and monitoring site conditions, contractors can improve crane mat performance, enhance safety, and extend equipment life. A proactive approach to ground support helps ensure lifting operations remain efficient, stable, and successful from start to finish.

Get in touch with Bigfoot today to find the best outrigger pad for your next job.

References

1. Occupational Safety and Health Administration (OSHA) – Cranes and Derricks in Construction Standard
   Provides federal safety requirements for crane operations, setup procedures, and ground condition considerations.
2. Occupational Safety and Health Administration (OSHA) – Ground Conditions Requirements (29 CFR 1926.1402)
   Details employer responsibilities for ensuring adequate ground conditions for crane setup.
3. Crane Manufacturers Association of America (CMAA)
   Offers industry guidance and technical resources related to crane operation and safety.
4. National Commission for the Certification of Crane Operators (CCO)
   Provides educational resources regarding crane safety, inspections, and best practices.
5. Association of Equipment Manufacturers (AEM) – Crane Safety Resources
   Industry information on safe crane operation, load management, and equipment support systems.
6. American Society of Mechanical Engineers (ASME) B30 Standards
   Widely recognized standards covering crane safety, operation, inspection, and maintenance.
7. International Powered Access Federation (IPAF) – Ground Assessment Guidance
   Offers practical guidance on assessing ground conditions and supporting heavy equipment.

The recommendations in this article are based on industry best practices and guidance from organizations including OSHA, ASME, CCO, AEM, and crane industry associations focused on safe lifting operations, ground-bearing pressure management, and crane stability.