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Comparison · Updated October 17, 2026

Vertical vs Flat (Horizontal) Parcel Sorter Layouts

The same SortLease S15 sorting line can be stacked in tiers or laid out side by side. Which one fits depends on your floor, your ceiling and how your docks are arranged.

Quick answer: choose a vertical layout (S15-V#, up to six tiers) when floor space is tight and the ceiling is high enough to stack; choose a flat layout (S15-F#, lines side by side) when you have floor space, a lower ceiling, or need lines spread across several docks. Each tier or line is rated at up to 3,600 parcels per hour either way, so capacity is the same; the difference is how it uses your building.
Side by side

How the Two Layouts Compare

Vertical (S15-V#)Flat (S15-F#)
LayoutTiers stacked, up to sixLines side by side
Rated throughput3,600 parcels/hour per tier (21,600 at six)3,600 parcels/hour per line
Floor spaceSmallest; capacity grows upwardGrows with each line added
Ceiling heightNeeds room to stackWorks under lower ceilings
Docks and stagingOutput concentrated in one areaLines can be spread across docks
Best forUrban stations and shared sites short on floorWarehouses with floor space or several loading areas

Every system is designed for its building. Send us floor area, clear height and dock layout and we'll recommend one.

Sizing

How Many Tiers or Lines?

Divide the parcels you need to sort by the hours you have to sort them, then divide by 3,600.

  • 3,000 parcels in 1 hour → 1 tier or line
  • 20,000 parcels in 2 hours → 10,000/hour → 3
  • 40,000 parcels in 2 hours → 20,000/hour → 6

Rated figures; actual throughput depends on parcel mix, label quality and staffing.

And versus a cross-belt sorter?

Either layout of the SortLease S15 uses about 40% less energy than a cross-belt sorter (manufacturer data) and is deployed line by line rather than as one large loop.

FAQ

Layout Questions

Is a vertical sorter slower than a flat one?

No. Each tier or line is rated at up to 3,600 parcels per hour either way. Six vertical tiers and six flat lines have the same rated capacity, 21,600 per hour.

When does a vertical layout make sense?

When floor space is tight and the ceiling is high enough to stack tiers, such as urban delivery stations or shared sites.

When does a flat layout make sense?

When you have floor space, a lower ceiling, or need sorting lines spread across several docks or loading areas.

Can I mix layouts or change later?

Systems are designed per site. Tell us your floor area, clear height and dock layout, and we'll recommend a configuration and how it can grow.

Talk to us about your station

Usually a reply within 24 hours. Your details stay confidential.