NASHVILLE STATE Community CollegeWarehouse & Inventory Management

LOGI 1030

Pallet Storage Systems

Material Handling Equipment

Pallet StorageBlock stacking:

Stored on the floor Pallets are stacked on top of each other Stack ability and stack height are dependent on the

following factors: WeightGeneral stabilitySOPs/Safety/OSHA acceptable safety

limitsFloor lead restrictionsPhysical height availabilityCrush limits

Pallet StorageBlock stacking:

Use when retrieving product based on LIFO (Last In First Out)

Not optimal for FIFO (First In First Out)

Best for large number of pallets for same SKU, low cost, no racking

Block Stacking

Pallet StorageStacking Frames:

Portable and collapsible framesBuild as neededSteel uprights with steel deckingEasy to collapse and storage is compact

Use for loads/pallets that are unsafe to stack on top of each other

Pallet Storage

Single-Deep Pallet Rack

Permanent racking only one pallet deepCan store multiple SKUs in same

column and rowBest to be used with loads that are not

stackable and SKUs with only a few pallets of product

Single-Deep Pallet Rack

Pallet Storage

Double-deep pallet rackPermanent racking two pallets deepUse with SKUs with five pallets or more

of product AND retrievals that are in multiple of two pallets

Use with high volume SKUsCan save significant space over single-

deep pallet racks

Double-Deep Pallet Rack

Pallet Storage

Drive-In Rack:Able to drive into the rackRacks are up to ten pallets deepPallets are stored on rails instead of

deckingUse with SKU quantities of five pallets

or greaterBest when have SKU totaling 20 pallets

or moreDownside, much slower production due

to confined space

Drive-In Rack

Pallet Storage

Pallet Flow RackSimilar to Drive-In Rack but has rollers

on the railsPallets are removed FIFO from the side

opposite from which it was loadedAs pallets are removed the remaining

pallets roll forwardUse with SKUs totaling ten pallets or

more

Pallet Flow Rack

Pallet Storage

Push Back RackSimilar to pallet flow rackPallets are removed LIFO from the same

side they are loadedLoad new pallet by pushing existing

pallets backRemove a pallet and the remaining

pallets flow forward

Push Back Rack

Pallet StorageMobile Pallet Rack

Series of single deep racks abutted next to each other with no aisle in between

Aisles are creating by pushing or cranking rows apart

Upside: considerable space savings

Downside: very slow production

Mobile Pallet Rack

Material Handling EquipmentWalk Behind Pallet Jack

May be manually operated or motorizedOperate from a walking positionMotorized versions may be capable of reaching

low heightsBest for short distance move

Material Handling EquipmentCounterbalanced Lift Truck

Lift truck with the weight on the back end to counter the weight of the load on the forks on the front end

Material Handling EquipmentStraddle Truck:

Instead of using counterbalance to provide stability, this truck uses outriggers to straddle the pallet.

Material Handling Equipment

Side Loader:Loads from the side. Forks are located

on the side not the front.Allows the operator to travel down the

aisle without having to turn the truck to retrieve a pallet

Downside: Can only reach one side of the aisle from a given direction of travel.

Side Loader

Material Handling EquipmentTurret Truck

Forks swing on the mast to either sideAllows for more narrow aisle spacing

Material Handling EquipmentAutomated Storage Retrieval (ASR)

Generally computer controlledRetrieval truck follows a computer controlled fixed pathStorage locations consist of a matrix of fixed locations