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Warehouse running out of space? Seven checks before you expand

Before you lease more space or buy racking, find where capacity is being lost: beam heights, aisles, slotting, part-empty locations, dead stock and staging.

By Roshan Mani Rao R · · 3 min read

On this page
  1. First, measure what you actually have
  2. Seven places warehouse capacity is lost
  3. When expansion really is the answer
  4. How we approach it

Short answer

Most warehouses that feel full are losing capacity inside the building, not running out of building. Before you lease, build or buy racking, check seven things: beam heights that no longer match your loads, locations holding part-pallets, fast movers parked in full pallet positions, aisles sized for equipment you no longer run, dead stock in prime locations, staging areas swallowed by overflow, and unused height above the top beam. Fixing these routinely recovers positions you were about to pay for.

The call usually comes after the aisles have started filling with pallets. Receiving is slow because there is nowhere to put stock away, pickers walk around obstructions, and the obvious answer seems to be a bigger warehouse. Sometimes it is. More often, the building has the room and the layout is giving it away.

First, measure what you actually have

Count total pallet and shelf positions, then count how many are occupied this week. A widely used rule of thumb is that a warehouse starts to struggle above roughly 85% occupancy: put-away slows, stock gets parked in the wrong places and productivity drops long before the building is literally full. If you are above that line, the question is whether the positions you have are the right ones, in the right places.

Seven places warehouse capacity is lost

1. Beam heights set for loads you no longer store

Racking is usually beamed for the pallet heights of the day it was installed. When product or packaging changes, the gaps above each pallet grow. Re-beaming to today's load heights can often add a level to a run of racking. Any change to beam levels must be checked against the manufacturer's rated capacities.

2. Locations holding part-pallets

A full pallet location holding a quarter of a pallet is three-quarters empty, but the system shows it as occupied. Consolidating part-pallets, and moving small quantities to shelving or half-height locations, frees positions without moving a single upright.

3. Fast movers parked in full pallet positions

Items picked in cartons or eaches rarely need a whole pallet location at pick height. A forward pick area with carton flow or shelving, replenished from reserve, holds more lines in less space and cuts picker travel at the same time.

4. Aisles sized for equipment you no longer run

Aisle width is set by the handling equipment. As a rough guide, counterbalance forklifts typically need around 3.5 to 4 meters, reach trucks around 2.7 to 3 meters and very-narrow-aisle trucks under 2 meters; confirm against your equipment's specifications. A site still laid out for counterbalance trucks after moving to reach trucks is carrying aisles it does not need.

5. Dead and slow stock in prime locations

Stock that has not moved in six months does not belong next to dispatch. Rank items by movement, move slow stock to high or remote locations, and put obsolete stock in front of someone who can approve its disposal. At large scale this is a working-capital problem as well as a space problem: in one retail analysis, $110M of stagnant inventory was identified for review.

6. Staging and dock areas used as storage

When storage is tight, overflow lands in receiving and dispatch staging. The dock then congests, unloading slows and the warehouse feels even fuller. Staging space is working space; keep it clear and the whole flow speeds up.

7. Unused height above the top beam

Check the building's clear height against your top beam level. If there is room for another level, the limits are your lift trucks' maximum lift height and capacity at that height, the upright frames' height and rated capacity, and sprinkler clearances, lighting and fire norms. Confirm with your racking manufacturer, equipment supplier and fire consultant before planning on it.

When expansion really is the answer

If the warehouse is still above roughly 85% occupancy after these fixes, and your growth plan adds volume, you need more space. Plan the new layout before you sign: a pre-occupancy site assessment tests a prospective building against how you will receive, store and dispatch, while you can still negotiate with the landlord.

How we approach it

We measure current capacity location by location, model the alternatives and test them against your own order data before anything is bought. On a program before TvastrOps, a 31,000 sq ft warehouse design tested in AnyLogic simulation produced a construction-ready concept with 40% lower projected space needs. See our warehouse layout and capacity service, or book a free 30-minute call with an engineer in Hyderabad.

[ free checklist ]

Warehouse Capacity Self-Check

A 30-point checklist to walk your own floor with. It shows where space, movement and stock accuracy are being lost, before you spend on a bigger building or new racking.

  • 30 yes/no checks across storage, flow, picking, inventory and line supply
  • A scoring guide that points to the area to fix first
  • The data to collect before talking to any consultant or vendor

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