In general, beam-supported racks are a common type of pallet racking system used for storing palletized goods in warehouses and distribution centers. The racks consist of upright frames and horizontal beams that create multiple levels of storage. The beams provide support for the pallets and can be adjusted to accommodate different pallet sizes.

Some key features of beam-supported racks include:

1. Upright Frames: These are vertical columns or posts that provide structural support for the rack system. The frames are typically made of steel and are anchored to the floor for stability.

2. Horizontal Beams: The beams connect to the upright frames horizontally and create the levels on which the pallets are stored. They are typically adjustable and can be positioned at different heights to accommodate varying pallet sizes.

3. Load Capacity: The load capacity of beam-supported racks depends on factors such as the strength of the upright frames, the size and thickness of the beams, and the configuration of the rack system. The load capacity is typically specified by the manufacturer and should not be exceeded for safety reasons.

4. Pallet Placement: Pallets are placed on the beams, with each pallet typically resting on two or more beams. The beams provide support for the pallets and help distribute the weight evenly across the rack system.

5. Accessibility: Beam-supported racks offer selective access to individual pallets. Forklifts or other material handling equipment can access pallets by driving into the rack aisles and lifting the pallets from the beams.

Beam-supported racks are available in various configurations, such as selective racks, drive-in racks, and push-back racks, to suit different storage needs and space constraints. The specific configuration and design of a beam-supported rack can vary depending on the requirements of the warehouse or storage facility.