How do I know how much warehouse I need? How to calculate the required area?

How to calculate how much warehouse you need? First of all, the estimation of the rented warehouse area is related to the storage cost of the enterprise, and then the later warehouse planning and storage efficiency. The savvy renter will consider the potential value behind this.

Many renters think that as many goods as there are, rent as many warehouses as possible. Is this really correct? Actually, this is not entirely true. Considering how much warehouses you rent is related to many factors, and the quantity of goods is only one of them. , The most important thing is how to manage the warehouse is important. This has a lot to do with inventory and shelves, and inventory is related to in and out of warehouses. When it comes to this, I think many of them have been stunned. There are so many variables. How can we determine how big a warehouse is needed? Please look below: How to calculate the rented warehouse area, summarize the following five steps.

Step 1: Estimate inventory
The general daily average inventory calculation method is to add the daily inventory quantity and divide by the corresponding number of days. The inventory of a specific warehouse needs to be determined according to the attributes of the goods and the turnover period. For example, if the renter’s product is a refrigerator, the warehouse may only be able to store 1,000 units. If the renter’s product is a mobile phone, the warehouse may be able to store 10,000 units. Therefore, the renter must first know what products they need to store and how large each product is, and then they can calculate the estimated inventory of the renter.

Step 2: Estimate the shelf area
Under normal circumstances, if the customer leases for a long time, such as 5 years, and the stacking standards of the goods are relatively standardized, you can consider installing shelves to increase the utilization rate of the warehouse, and the return on investment is also good. If the lease period is short, it is not recommended to install shelves, because it is very likely that after the customer withdraws from the lease, the shelf type is not suitable for other customers and the monthly depreciation expense of the shelves is also a large amount.

  1. Flat basement (using pallets to stack goods on the ground):
    According to the editor’s experience, the current size of general pallets in the industry is 1.2×1 (m). From this, we can estimate how many pallets are needed and what is the floor space based on the inventory, the proportion of each category in the inventory, the number of SKUs, how each pallet is stacked, and the maximum stacking layers? (Note: According to the national standard “Code for Fire Protection Design of Buildings”, each pallet stacking area of ​​the warehouse shall not exceed 100 square meters.)
  2. Three-dimensional warehouse (use the shelf to store goods):
    First of all, the floor area of ​​a single shelf should be calculated according to the shelf length and width according to the pre-judged which type of shelf the warehouse materials are suitable for. Simply popularize the little common sense of the shelf. Common types of racks are: beam racks, drive-in racks, gravity racks, and shuttle racks. If the goods are of small variety and large quantity, it is recommended to use large-space racks, such as drive-in or shuttle racks. The latter is currently the most popular on the market. If there are many varieties and small batches, it is recommended to use beam racks or gravity racks. If the variety of goods is small and large in quantity, when designing large-space shelves, we must configure some beam-type shelves, the purpose is to timely empty the remaining scattered goods on the large-space shelves in time, so as to improve the ranking of large-space Utilization rate.

Secondly, it is necessary to calculate the shelf height, shelf height = warehouse net height / (goods height + shelf thickness and redundant space). (Note: According to the national standard “Code for Fire Protection Design of Buildings”, the horizontal distance between the vertical bottom of the lamp and the stack shall not be less than 0.5m)

Finally, calculate how many shelves are needed based on the inventory and the shelf height, and then estimate the total shelf area required based on the floor space of each shelf.

Step 3: Estimate the channel width
The width of general warehouse aisle can be determined from the following aspects:
According to the material turnover, the external dimensions of the material and the transportation equipment in the warehouse, the warehouse with large material turnover and frequent sending and receiving should be determined according to the principle of two-way operation. The minimum width can be calculated as follows: B=2b+C
In the formula: B—minimum channel width (m); C—safety gap, generally 0.9m; b—transport equipment width (including the width of the material to be handled, m).
In general warehouses that do not require forklift operations, the aisle is generally 0.9m; the width of the aisle is generally 1.6~2m when transported by a hand forklift; when transported by a motorized forklift, it is generally 3.6~4.2m. Of course, for warehouses using forklifts, the smaller the aisle, the more difficult it is to operate, and the forklift should also be small. Forklift drivers must be very skilled. If the aisle is between 3.1 and 4.2m, even novice forklift drivers will have no problem.

Also consider the relevant provisions of the national standard “Code for Fire Protection Design of Buildings”: the distance between stacks and electrical equipment is not less than 1m; the distance between stacks and stacks is not less than 1㎡; the width of the main channel is not less than 2m; the spacing between stacks and beams and columns Not less than 0.3m; the distance between the stack and the wall is not less than 0.5m.

Step 4: Estimate the area of the stocking area
The warehouse stocking area refers to picking goods in the inventory area according to the item’s invoice. After the picking is completed, check the quantity of the items in the stocking area, and place them in the shipping area for delivery. Generally, the size of the stocking area is determined by the average daily volume of goods in and out of the warehouse.

Step 5: Estimate how much warehouse to rent
Warehouse pre-leased area = pallet (shelf) floor space + aisle width + stocking area

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