Lift tables are available in a wide range of platform sizes. The minimum and maximum platform dimensions are determined by the size of the lower frame.
It is common for a lift table platform to extend slightly beyond the lower frame in both width and length. However, this platform overhang directly affects performance, safety, and load capacity ratings.
Lift table platform sizing is a critical factor in overall performance and safety. As platform overhang increases, end-edge and side-edge load capacity ratings are reduced, which can impact suitability for applications such as pallet handling, rolling loads, or material transfer operations.
Static Load Capacity Ratings
Static loads refer to loads that are placed onto the lift table platform and remain stationary during operation. Lift table capacity ratings are primarily based on these static loading conditions:
- Evenly distributed load rating
- Platform end-edge load rating
- Platform side-edge load rating
These ratings define how much weight the lift table can safely support depending on how the load is positioned on the platform:
- Evenly distributed load: Weight spread uniformly across the entire platform surface
- End-edge load: Weight concentrated at the end of the platform
- Side-edge load: Weight concentrated along the side of the platform
As platform size increases beyond the lower frame (platform overhang), end-edge and side-edge load capacity ratings are reduced due to increased structural stress.
Evenly Distributed Load
Evenly distributed load ratings are based on the total weight placed on the platform, with the load spread evenly across the entire surface of the lift table platform.
This represents the most stable and standard loading condition for hydraulic lift tables when the load is stationary.
Dynamic (Rolling) Loads
Lift tables that are loaded using a pallet truck, cart, wheeled equipment, conveyor, or indexing system are referred to as handling a rolling or dynamic load.
In these applications, the load is not simply placed onto the platform, it is rolled on or off the lift table surface. This creates a dynamic loading condition during entry and exit, placing increased stress on the platform.
Dynamic (rolling) loads are closely related to end-edge loading conditions, since the load is typically introduced from the end of the platform. As a result, rolling loads can significantly reduce allowable end-edge load capacity, especially when platform overhang increases beyond the lower frame.
For this reason, dynamic loading applications must carefully consider platform size, edge distance, and load positioning to ensure safe operation and proper performance.
End-Edge and Side-Edge Load Conditions
In addition to evenly distributed loading, lift tables are rated for edge loading conditions:
- End-edge load rating: Load positioned at or near the end of the platform
- Side-edge load rating: Load positioned at or near the side of the platform
These conditions introduce higher stress concentrations compared to evenly distributed loading.
As platform overhang increases beyond the lower frame, both end-edge and side-edge load capacities decrease. This is an important consideration when selecting larger platform sizes for applications requiring full surface utilization.
Summary
Lift table platform size plays a critical role in determining load capacity, performance, and application suitability.
While evenly distributed loads represent ideal conditions, real-world applications often involve dynamic (rolling) loads and edge loading scenarios that significantly impact allowable capacity.
Proper lift table selection requires understanding how platform size, load placement, and loading method interact, especially in applications such as pallet handling, manufacturing, and production line integration.
Contact Pentalift for More Information
For assistance selecting the right lift table for your application, please contact the Pentalift Sales Department. Our experienced team can help determine the most suitable lift table solution based on your requirements.