How to calculate how big a warehouse you need?

How to calculate how big a warehouse you need? First of all, the estimated area of rented warehouses is related to the storage cost of the enterprise, and then the planning and storage efficiency of the warehouse in the later stage. The smart renters will consider the potential value behind this.

There are a lot of renters who think that there are as many goods as they want. It ’s true that this is true. In fact, this is not entirely true. Considering how much to rent, it has many factors, and the amount of goods is just one of them. It is always important to manage the warehouse. This has a lot to do with inventory and shelves. Inventory has to do with getting in and out of the warehouse. Speaking of which, I think many of them have been dizzy. So many variables. How can I tell how big a warehouse is needed? Please see below: How to calculate the rented area, summarize the following five steps.

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

Step 2: Estimate shelf space
Under normal circumstances, if the customer leases for a long time, such as 5 years, and the stacking standard of the goods is relatively standard, you can consider installing shelves to improve the utilization rate of the warehouse and the return on investment is good. If the lease period is short, it is not recommended to install shelves, because it is likely that after the customer returns the lease, this shelf type is not applicable to other customers and the monthly depreciation cost of the shelf is also a considerable amount.

1, Flat floor warehouse (stack the goods on the flat floor with pallets):
According to the experience of the editor, the size of the universal pallet in the industry is 1.2×1 (m). From this, you can estimate how many pallets are needed and what is the floor space according to the inventory, the proportion of each category in the inventory, the number of SKUs, how to stack each pallet, and the maximum number of pallets. (Note: According to the national standard “Code for Fire Protection in Architectural Design”, the area of ​​each pallet stack in the warehouse is not more than 100 square meters.)

2, three-dimensional library (the goods are stored on the shelf):
First of all, we need to predict which type of shelf is suitable for warehouse materials, and calculate the area of ​​a single shelf according to the length and width of the shelf. Simply spread the little common sense on the lower shelf. Common types of shelves are: beam shelves, drive-in shelves, gravity shelves, shuttle shelves. If the goods are small in quantity and large in quantity, it is recommended to use large shelves, such as drive-in or shuttle shelves. The latter is currently more 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 the goods is small and large in quantity, when designing large-size shelves, be sure to configure some beam-type shelves, in order to timely empty the remaining scattered goods on the large-size shelves in time, so as to improve the large-size ranking. Utilization.

Secondly, 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 in Architectural Design”, the horizontal distance between the vertical lower part of the lamp and the stack must not be less than 0.5m)
Finally, calculate how many shelves are needed based on the inventory and shelf height, and then estimate the total shelf area required based on the floor area of ​​each shelf.

Step 3: Estimate the channel width
The general warehouse aisle width can be determined from the following aspects:
According to the turnover of the material, the overall dimensions of the material and the transportation equipment in the warehouse to determine the warehouse with a large amount of material turnover and frequent sending and receiving, the aisle should be determined according to the principle of two-way operation. B = 2b + C. In the formula: B—minimum aisle width (m); C—safety clearance, 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 carried by a hand forklift; when it is carried by a motorized forklift, it is generally 3.6 ~ 4.2m. Of course, the warehouses using forklifts have smaller aisles, which are not easy to operate. Forklifts must also be small. Forklift drivers must be very skilled. If the aisle is between 3.1 and 4.2m, even novice forklift drivers have no problems.

Also take into account the relevant provisions of the national standard “Code for Fire Protection in Architectural Design”: 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; 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
Warehouse stocking area refers to picking in the inventory area according to the item’s delivery note. After the picking is completed, the item stocking quantity is checked in the stocking area, and it is put into the shipping area for delivery without error. The size of the general stocking area is determined based on the average daily volume of goods entering and leaving the warehouse.

Step 5: Estimate how much warehouse to rent
Warehouse pre-leasing area = pallet area (shelf) area + aisle width + storage area.

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