Think your facility is too old? Do you think your ceiling is too low for modern warehouse automation? Think your building is not suited for automation? Does your facility restrict you from embracing automation? This article will help you think again and show you how you can stay competitive.

We’ve all seen those iconic legacy warehouses in cities like New York, Chicago, and Dallas. Whether you’ve driven past them or spotted them on your favorite TV shows, it’s easy to forget that many people still work in these century-old buildings every day.

So, what happens when these facilities — designed and built decades ago, with low ceiling heights and multiple floors — need to compete in a world of high-density, high-throughput automated warehousing? Are they destined to become trendy lofts and breweries, or can they still serve as efficient, competitive storage and distribution centers?

If you’re managing operations in an older facility with limited vertical clearance, you might be wondering: Is it even possible to achieve the benefits of modern automation — high throughput, dense storage, precise picking — without tearing down walls or rebuilding from scratch?

At Streamline-It, we’ve helped countless clients answer this question with a resounding yes. Let’s explore how.

Low Ceilings? No Problem. Proven Solutions for Legacy Buildings

Many older warehouses and factories have multiple floors and/or limited ceiling heights, which can make modern high-bay systems — like unit loads, mini-loads, and advanced shuttle systems — challenging to implement. As Cary Spraggins, President of Streamline-It, explains, “With VLMs, you start pushing the limits once you drop below 15 feet of ceiling height. Almost 25–30% of the machine is just controls and the pick-window — so what’s the alternative?”

Fortunately, there are smart ways to modernize without a major rebuild:

1. Horizontal Carousels

Did you know horizontal carousels were the original goods-to-person automation solution to hit the market? Decades later, they remain a cost-effective, high-ROI choice. A horizontal carousel paired with an automatic inserter and extractor, along with remote picking stations, is a powerful solution that fits beautifully in older buildings. An 8-foot carousel can be ideal for maximizing space and productivity in tight vertical clearances. Discover more about the power of horizontal carousels in our dedicated blog post, ‘Forgotten Automation.’

2. Vertical Carousels

Vertical carousels are another excellent option when floor space is limited but ceiling height is modest. These self-contained systems are simpler to operate and maintain than VLMs, yet still deliver the core benefits of automation: improved accuracy, labor savings, and streamlined workflows. While their name suggests a focus on vertical storage, these systems can still be a smart fit for facilities with lower ceiling heights.

3. Pick Modules and Narrow Aisles

For operations needing high-speed picking, automated pick modules with narrow aisle configurations and carton flow racks can greatly boost efficiency. Pair these with gravity conveyors or goods-to-person AMRs (Autonomous Mobile Robots) to further accelerate ROI.

4. 3D or 4D Pallet ASRS Shuttles / Omni-Shuttles

Considering typical pallet storage solutions use 50% more aisle space for a forklift, the cost-effectiveness of 3D or 4D Pallet ASRS Shuttles — also known as Omni-shuttles — has arrived. These systems provide better, safer, more space- and labor-efficient pallet storage. Coupled with Pallet AMRs, you have a hands-free pallet storage and retrieval system that can be deployed from dock to stock and stock to dock.

5. AMRs & Goods-to-Person Robots — Even in Multi-Floor Facilities

Streamline-It’s offering of Pallet AMRs is unique in that they don’t require a slave stand to handle the pallet, and they can take up virtually the same footprint as the pallet. Modern AMRs and Goods-to-Person robots excel in older buildings too. All Streamline-It’s top-tier AMR partners and robot brands offer high-density solutions, and their horizontal transport AMRs integrate seamlessly with freight elevators, eliminating the need for excessive disruptions and costly structural modifications. As Cary Spraggins notes, “With AMRs, you don’t have to cut holes in floors — modern AMR and G2P systems can integrate with elevator controls that make multi-level automation possible.”

The Bottom Line

It’s entirely possible to modernize and automate processes within older buildings — and do so cost-effectively. The key is choosing solutions designed to work with your existing infrastructure rather than against it.

With the right planning and expert guidance, you can unlock the same benefits enjoyed by state-of-the-art facilities: higher throughput, increased storage density, greater picking accuracy, and more productive labor.

If you’re ready to discover what’s possible in your legacy warehouse, the Streamline-It team is here to help. We offer industry-leading automation brands and comprehensive services to tailor the best solution for your unique goals.