Pallet Rack Starters vs Add On Units: Key Differences (Video)
What’s the Difference?
In a general sense, a starter is best described as a complete section that is intended for use as a stand-alone section, or the first bay in a continuous run. An adder is not a complete section and must be connected to either a starter or another adder.
For example, building a run of two connected pallet rack bays requires one starter and one adder, but building two separate pallet rack bays require two starters. The difference between starters and adders when it comes to selective pallet rack is with the uprights, as both will have the same number of beams and wire deck.
Starter and Adder Bays
Starter bays have two uprights, while adder bays only have one upright. The side of the adder bay without an upright is able to connect to a starter bay or another adder bay to build a continuous run.
When looking at cantilever rack, the difference between starters and adders is only with the towers. Both will have the same bracing and arms, but the starter will have two towers and the adder will only have one tower. Just like with pallet rack, the open side of a cantilever bay will have to be connected to a starter or adder to build a continuous run.
The same pattern is true for boltless rivet shelving and warehouse shelving. Both boltless rivet shelving and metal-clip shelving use posts on each corner instead of uprights or towers. A starter will have posts for all four corners while an adder will have two posts, and open on the other side.
These shelves use posts on all four corners instead of uprights. A starter unit will have four posts while an outer unit will have two posts. Adders need to be connected to either a starter or another adder to build continuous runs, and starters are the only ones that can stand alone.
Building your Run
In the end, you’ll always need a starter section and then depending on your configuration and needs, you can start to include adder sections.
If you have any more questions about starters or adders, please give us a call or look us up at wh1.com.