Proper ground stabilization minimizes accidents, protects infrastructure and extends the lifespan of lifting equipment.
Broken down simply, outrigger pads / crane mats are used for these three reasons:
• To make sure the load handling equipment( LHE) is level within the manufacturer’ s guidelines.
• To effectively broadcast the pounds per square inch or per square foot from the outrigger to the ground by increasing the surface area point of contact.
• To prevent the LHE from sinking into the ground, tipping over or collapsing, protecting personnel, property and equipment.
The Occupational Safety and Health Administration( OSHA) and American Society of Mechanical Engineers( ASME) both have published works with information about proper outrigger padding practices.
OSHA 1926.1402( b) states:“ The equipment must not be assembled or used unless ground conditions are firm, drained and graded to a sufficient extent so that, in conjunction( if necessary) with the use of supporting materials, the equipment manufacturer’ s specifications for adequate support and degree of level of the equipment are met. The requirement for the ground to be drained does not apply to marshes / wetlands.”
ASME B30.5-3.2.1.5( i) states that blocking under outrigger floats, when required, shall meet the following requirements:
1. Have sufficient strength to prevent crushing, bending or shear failure.
2. Be of such thickness, width and length as to completely support the float, transmit the load to the supporting surface, and prevent shifting, toppling or excessive settlement under the load.
Correct Practices for Safe and Reliable Lifts
Using outrigger pads and crane mats effectively involves more than just placing them under equipment. Proper use requires:
• Assessing the ground conditions before setting up helps identify potential hazards. In many cases, identifying the soil type allows the project manager to decide whether extra padding is required. In some cases, an exact ground bearing capacity is needed for an allowable ground bearing pressure to be established, where precise engineering calculations will determine the size of the pad required. This is when geotechnical engineers may be necessary.
• Choosing the right pad or mat based on the equipment’ s weight, soil composition and expected pressure.
• Inspecting pads and mats regularly for signs of wear or damage, replacing them when necessary.
By following these best practices, crews can mitigate risks and enhance the performance of their equipment, ensuring safer and more efficient lifting operations.
www. contractorshotline. com April 25, 2025 25