It’s not uncommon for delegates at our workshops and seminars to ask us if Mal Walker can share his ‘rules of thumb’ on warehouse design. Therefore, we thought we’d put them here in an article, so anyone can refer to them when necessary. We’ve also added a checklist of things to consider during the early stages of warehouse design.
Warehouse Design Rules of Thumb
- Ideal Land to Building ratio in lineal metres, 1.7:1–2:1
- Building aspect ratio, 1.7:1 – 2:1
- Ideal Warehouse Height at Springing Line 9.5-10.5 metres
- Pallet per Sq metre ratio 1 – 1.2 (with conventional storage racking)
- Truck turning space 30-40 metres
- Approx 20 to 25% of warehouse floor should be left for non storage operations e.g. receiving, dispatching staging
Important Planning Points
- Always plan for driver-side reversing
- Do not compromise aisle space for the sake of a few extra storage bays
- Avoid funnels and bottlenecks
Checklist of Warehouse Design Considerations
- Requirements and specifications for loading docks
- MHE battery charging/changing stations (location and provision for ventilation)
- Building support columns should be spaced/located in a way that allows for optimal layout of storage media and aisles
- Number of warehouse doors/loading and unloading bays
- Location of offices and other non-storage space (canteen, restrooms, other)
- Ensure lighting will be adequate and ideally, environmentally friendly (LED, induction?), and low maintenance
- Minimisation of obstacles or areas creating bottlenecks in warehouse flow
- Minimisation of travel-distances within the warehouse
- Fire prevention and firefighting equipment
- Adequate drainage should be designed into the warehouse site
- Low-maintenance warehouse roof design
- Heating, climate control, and insulation
- Radio frequency, LAN/WAN, or other communication/data-transfer infrastructure
- Storage areas for empty pallets
- Waste disposal solutions
- Security concerns, such as car-parking, checkpoints, location of cameras
- Future plans for automation, expansion and/or a change in storage requirements
Need More Help with Warehouse Design and Planning?
I hope this information will help you in your warehouse planning. I’m sure if you have any other questions, Mal would be glad to help you. Please feel free to send us a message on our contact page and mention that you’d like to discuss warehouse design with Mal.
Editor’s Note: This post was originally published in June 2014. It has now been revamped and updated with more comprehensive information.
Best Regards,
Rob O’Byrne
Email: [email protected]
Phone: +61 417 417 307
Just want to know what the receiving bay size is of a distribution centre ,44m in length, 15m wide and 12m in height? Thanks for your assistance
There is no ‘standard’.
It will depend on how often you are receiving, the incoming load sizes, type of ‘unit’ being received, how long putaway takes and more.
As outlined above, a rough rule of thumb is 20% of the space for receiving and dispatch.
Of course sometimes the same space might be used for both activities.
Hi, Could you please share typical schedule for a warehouse/ fulfillment center and typical cost break down structure for the same.
Thanks for assistance
I’d love to share it, but 2 things (1) it varies a lot by country and (2) there is considerable IP in what you are requesting and I’m not sure my warehouse consultants would be happy if I gave it away 🙁 Maybe we can do some videos on some aspects of it? In fact one of my warehouse consultants just shot a couple of videos that will be published in the next 2-3 weeks on this channel https://www.youtube.com/user/robobyrne/
Please advise the general rule of thumb for placement of goods in a warehouse?
The point I gathered would be fastest moving products stocked closest to the pick point and at levels easy to pick from!
Fastest moving closest to the packing and despatch area. And generally lower down. Try to minimise horizontal and vertical travel. But also don’t have all the fast movers together or the pickers will be falling over each other!
Warehousing where pickers are moving?
This is why we can not find a suitable off the shelf warehouse mngt system. They all focus on pick optimisation.
Picking labour isf often the highest cost in a warehouse, so that’s why. But a good WMS should of course focus on other things too. There are plenty of good WMS out there.
Our design is for processing of 600 (75 sku average per order) orders every 15 mins
There is currently no WMS that is designed to work with this level of processing.
It equates to 500,000 per week compared to Amazons 10,000
The orders are across a range of 7,500 sku’s with around 1500 being fresh produce.
That doesn’t sound very unusual. I’m surprised you can’t find a WMS with that capacity.
On reflection and not being a WMS specialist, I spoke to one of our warehouse specialists, and see that indeed is a very high throughput.
I’ll put you in touch with him.
Hi. can you advise, if the dock doors should be provided at one side of warehouse or both side (for large warehouses eg 4L and above)
What should be the Building aspect ratio in case of 2 side dock doors.
It is quite difficult to get building aspect ratio of 1.7: 1 -2:1 for large warehouses like 4L sqft and above due to site constraints. What do you suggest in that case.
Every site is different and the needs of the business are different, so without knowing the details of either it would be impossible to say. These are just rules of thumb. By all means contact us if you require a warehouse professionally designed.
Hello, is there a rule of thumb for the ratio of number of people directly reporting to their supervisors in a typical pick-pack warehouse? For example – 1 supervisor can handle max 20 FTEs, etc.
I need it for FTEs:Leads, Leads:Supervisors, Supervisors:Managers, Managers:Director, etc.
Thank you in advance.
The short answer is…….
It depends on the type of operation.
facility size, volume throughput, complexity of pick/pack., level of automation,
But I’ll ask one of our warehousing specialists (his response was the same)
The historical general theory on reporting structure is that following on from the Roman army.
The smallest Contubernium was about 8:1, there were about 10 Contubernium per Centurian i.e. 10:1.
So, this would suggest the range of direct reports varies better 8 to 10 as a maximum.
I had in one role 14 and definitely felt this was too many.
I think however with technology this number could increase.
Hi, just wanted to clarify the point where you consider ~10 meters to be the ideal warehouse height. It is not uncommon in Eastern Europe, for example, to build warehouses with springing line height of 12 meters, which leads to the question if it makes sense to aim at the highest building possible?
It’s not that easy. Warehouse height is also a result of things like land cost, labour cost and the cost / benefit of technology.
Low costs for land, labour and building, will tend to lead to low rise warehouses.
The reverse can lead to high rise warehouses.
Do you have a rule of thumb for your warehouse column spacing or grid?
I’ll need to ask one of our warehouse specialist this question. It will also depend on your standard racking dimensions. What country are you in? What are your standard beam widths (centre of upright to centre of upright)
The UAE. Honestly I am not sure what the standards are.
Hard to give you meaningful advice then, sorry. Warehouse storage height is governed by many things. Local labour cost and building/land cost being the main ones. High costs will often lead to higher buildings and more automation.
hello , my curiosity is about warehouse design pavement and foundation requirement ?
That would depend on the types of materials being stored (weight) and also the type of materials handling equipment being used. They all have different requirements depending on wheel loads, point loads and requirements for floor ‘flatness’.