What is a Langstroth frame and why did it change beekeeping?

A Langstroth frame is a movable wooden or plastic rectangular structure designed to be placed vertically inside a Langstroth hive, on which bees build their combs. It is a fundamental element of modern industrial beekeeping, allowing combs to be removed and inspected without destroying the bee colony. Its main feature is the precise observance of the “bee space” between the elements (6.4-9.5 mm), which prevents the frames from sticking together with propolis or the construction of excess combs.

This seemingly simple wooden frame revolutionized beekeeping. Before its invention, beekeepers worked with skeps (woven baskets) and logs, where the combs were firmly attached to the walls. Each honey harvest turned into a bloodbath — the combs had to be cut out, killing the bees and destroying the brood. Langstroth changed this in 1851 when he realized the importance of bee space. Perhaps it was the depression he was trying to cure with beekeeping that made him look at bees differently… not as a resource, but as an organism with which he could cooperate.

Today, the Langstroth frame dominates 75% of the world’s apiaries. In the US and Canada, it is the undisputed standard, and in Europe, it is the second most popular after the Dadant frame. It has become the language spoken by the global beekeeping industry.

How Reverend Lorenzo Langstroth found the solution in empty space

Lorenzo Lorraine Langstroth was born in Philadelphia on December 25, 1810. A priest by vocation, a beekeeper by necessity, beekeeping helped him cope with debilitating bouts of depression. In 1838, after seeing a jar of honey at a friend’s house, he immediately bought two beehives. By 1851, Langstroth had become obsessed with the idea.

Lorenzo Langstroth wrote: “The main feature of my hive is the ability to remove frames without enraging the bees. I could do without natural swarming and multiply colonies faster than with traditional methods. Weak colonies could be strengthened, and those that had lost their queen could be provided with the means to obtain a new one.”

In the summer of 1851, Langstroth experimented with the hive, trying to prevent the lid from sticking with propolis. In the fall of that year, it dawned on him: the space between 6.4 and 9.5 mm is an area that bees do not fill with wax or propolis. They simply leave it for movement. If it is less than 6.4 mm, they seal it with propolis. If it is more than 9.5 mm, they build combs.

Now imagine the scale of the breakthrough. Langstroth applied bee space not to the lid, but to the frames themselves. If you leave an exact gap between the frame and the wall of the hive, and between the frames themselves, the bees will not glue anything. The frames will become movable. The entire structure will turn into a modular system that can be disassembled and assembled like a construction set.

On October 5, 1852, Langstroth received patent No. 9300. But this did not bring him joy. The patent was ignored and violated left and right. He never received any royalties. He spent years in court battles and lost. His health deteriorated. At one point, he even returned to teaching at a girls’ school to make ends meet.

The irony of history: the man whose invention enriched thousands of beekeepers around the world died in 1895 without being wealthy. But his frame outlived him by a century and a half and continues to be used today.

Anatomy of a Frame: Four Elements and the Principle of “Bee Space”

Any Langstroth frame consists of four basic components, regardless of its size. This design principle has remained unchanged for over 170 years.

1. Top bar — always 19 inches (483 mm) long, regardless of the depth of the frame. This is a universal standard. The ends of the top bar extend beyond the side bars and rest on a rabbet, a special recess in the walls of the hive body. It is the top bar that “suspends” the frame inside the hive, preventing it from falling. It often has a removable wedge under which the foundation is attached.

2. Bottom bar — has a groove or slot along its entire length. In some designs, it is simply a split bar. Its function is to provide tension to the foundation (if used) and to create rigidity for the entire structure. When using foundationless frames, the bottom bar is often solid.

3. Two side bars — vertical elements. Their height determines the type of frame: deep, medium, or shallow. The thickness of the side bars is usually 1-1/16 inches (27 mm). There should be a gap of 6.4-9.5 mm between the side bar and the wall of the hive — this is the bee space.

4. Foundation — an optional but extremely common element. It is a thin sheet of beeswax or plastic with an embossed pattern of honeycomb cells that is inserted into the frame. The foundation serves as a template, encouraging bees to build even combs.

Why exactly 19 inches? Langstroth chose this length empirically, based on observations of bees and available lumber. Modern calculations show that a 19-inch frame can hold about 6,000 cells on both sides. This is sufficient for a compact brood nest, but not excessive for a single frame that needs to be lifted by hand.

As for the thickness of the side strips, a compromise is needed. Thinner than 27 mm, the frame becomes fragile, especially when centrifuged in a honey extractor. Thicker than that, and you lose internal space in the body. In addition, slats that are too thick violate bee space: the gap between the frames is reduced, and the bees begin to glue them together with propolis.

Interesting fact: in the UK, a tolerance of 0.1 mm is used in frame production. In the US, it is up to 1.6 mm. Therefore, American beekeepers prefer the upper limit of bee space (9.5 mm) to compensate for these inaccuracies.

Frame sizes: Deep, Medium, Shallow — what is the practical difference?

As already mentioned, the length of the top bar is always 19 inches (482,6 mm). The width of the frame (including the side bars) is about 35 mm. Bee space: 3/8″ (9,5 мм)  But the main difference is in the height of the side bars. There are three standard sizes:

Frame type	Height of side panels	Application	Weight of a full frame with honey
Deep	9-1/8″ (231,8 mm)	Brood chamber, rarely — for honey	~4 kg
Medium	6-1/4″ (158,8 mm)	Versatile: both brood and honey	~2,7 kg
Shallow	5-3/8″ (136,5 mm)	Only honey, often for sectional honey	~2,3 kg

Why size matters

Deep frames are the traditional choice for brood chambers. Their greater height provides the queen with a continuous area for laying eggs. The colony forms a compact spherical brood nest, which is important for thermoregulation in winter. But if a deep frame is filled with honey, its weight can exceed 4 kg. A full 10-frame deep body weighs more than 40 kg. This can be a problem for older beekeepers or people with back problems.

Medium frames are a compromise. Many modern beekeepers are switching to a completely medium configuration: both brood and honey in identical hives. This simplifies logistics (all hives are interchangeable) and reduces weight, but requires slightly more hives for an equivalent volume. A full medium frame weighs about 27 kg — manageable.

Shallow frames are almost never used in the brood chamber. They are too shallow, and the brood nest will be torn apart by the horizontal planes between the frames. In winter, this is detrimental to the bees. However, shallow frames are ideal for honey collection. They are lightweight, easy to work with on the honey extractor, and are often used for the production of comb honey (honey in the frames).

If you are over 60, have back problems, or simply don’t want to overexert yourself, use 8-frame medium hives for the entire apiary. Yes, you will have to use one more hive than with deep hives. But you will be able to work without pain. It’s worth it.

8-Frame vs 10-Frame: The War of Standards That Never Was

Historically, Langstroth designed a 10-frame hive. This has been the standard that all manufacturers have followed since 1852. But somewhere at the end of the 20th century, 8-frame hives began to appear. Not a revolution, more of an evolution.

Technical differences:

10-frame box:

•    External dimensions: 19-7/8“ (length) x 16” (width)

•    Internal dimensions: 18-3/8“ x 14-3/4”

•    Weight of full deep body: ~42-45 kg

•    Number of frames in hive (2 deep + 2 medium): 40 frames

8-frame box:

•    External dimensions: 19-7/8“ (length) x 14” (width)

•    Internal dimensions: 18-3/8“ x 12-1/2”

•    Weight of full deep body: ~34-36 kg

•    Number of frames in hive (2 deep + 2 medium): 32 frames

Please note: the length of the box remains the same — 19-7/8″. Only the width changes. This means that the frames are completely interchangeable between 8- and 10-frame bodies of the same depth. A deep frame from a 10-frame box can be placed in an 8-frame box (there will be empty space on the sides, where a dummy board is placed).

Arguments of the parties:

Supporters of the 10-frame hive argue that more frames = more honey from a single hive, less vertical growth of the hive, and stability (this is, after all, the original Langstroth standard). Supporters of 8-frame counter that the difference in weight of 8-10 kg per hive protects the beekeeper’s back. In addition, a narrower hive is easier to carry and less bulky. The deficit of 8 frames is compensated by adding one extra hive.

In practice, both systems work. The choice depends on the physical capabilities of the beekeeper and the scale of the operation. Large commercial apiaries prefer 10-frame — fewer bodies to move with cranes and loaders. Hobby beekeepers and small apiaries tend to prefer 8-frame.

Important note: accessories and equipment are NOT interchangeable. If you have 10-frame hives, you cannot use 8-frame inner covers, queen excluders, or feeders. This means that when starting an apiary, you need to make a clear decision.

Pros and cons of the Langstroth frame

The Langstroth frame is not an ideal solution. It is an engineering compromise created 170 years ago for specific conditions. Let’s take a look at what we get and what we give up when choosing this system.

Advantages

Modularity and standardization. This is the main thing. You can buy a frame in California, a body in Texas, an inner cover in New York — and everything will fit together. The global supply chain works for you.

Ease of inspection. Pull out the frame, look at the brood, assess the honey reserves, put it back in place. The bees are almost unaffected, and the structure of the nest is preserved. This is impossible in a skep or log hive.

Disease control. See rot on one frame? Take it out, burn it, put in a new one. In a top bar hive, you would have to cut out half of the combs.

Scalability. Need more space for honey? Add another body on top. Has the colony weakened? Remove the extra bodies. This flexibility makes Langstroth ideal for commercial beekeeping.

Maximum honey yield. Of the three main types of hives (Langstroth, Top Bar, Warre), Langstroth produces the highest yield. The vertical structure allows bees to fill frame after frame without being limited by horizontal space.

Disadvantages

Weight. This is the main problem. A Deep 10-frame hive, full of honey, weighs 40-45 kg. If you have 3-4 hives on your apiary and you need to get to the bottom brood box, you will be lifting and putting back 80-120 kg of wood and honey. Twice. It kills your back. Every beekeeper with 10+ years of experience has chronic lower back pain.

Labor-intensive inspections. Langstroth requires regular thorough inspections. Open, lift the inner cover, remove the upper hives, inspect the brood box, put everything back together. It takes 20-30 minutes per hive. Do you have 50 hives? That’s 16-25 hours of work every 7-10 days during the active season.

Disruption of thermoregulation. Every time you open a hive, you disrupt the thermal balance that the bees create with propolis and wax. In winter, this can be critical.

Start-up cost. A starter kit (1 hive, 20 frames, foundation, tools, protective clothing) costs $200-400. This is acceptable for a hobby, but starting a commercial apiary requires tens of thousands of dollars.

Aesthetics. Langstroth looks like a stack of boxes. If the beauty of the apiary is important to you, then Warre or horizontal hives are the better choice.

The main compromise

By choosing Langstroth, you sacrifice your back and time for maximum control and honey yield. If industrial production is your priority, this is the right choice. If you want a relaxed, low-intervention approach to beekeeping, consider a top-bar or Layens horizontal hive.

Alternatives and evolution: What came before and what comes after

Before Langstroth: Skeps, log hives, and Hubert hives

Until 1851, bees were kept in skeps—conical straw baskets. These had been used since the Middle Ages. Bees built honeycombs, attaching them to the walls and ceiling. Honey harvesting = killing the colony. The beekeeper fumigated the bees with sulfur, cut off the combs, pressed them, and filtered the honey. The bees died. The following spring, a new swarm had to be caught.

Another option was log gums (logs hollowed out to form hives). These were popular in Eastern Europe and Russia. The principle was the same: the combs were attached to the walls, there was no access, and harvesting was destructive.

In 1789, Swiss François Huber invented the leaf hive — a hive-book with frames-pages that could be opened like a book. It was the first movable-frame hive. But the design was cumbersome, expensive, and the frames were still glued together with propolis. The idea did not gain widespread popularity.

In 1814, Ukrainian beekeeper Pyotr Prokopovich created a collapsible frame hive — 37 years before Langstroth. But information about this invention did not spread beyond the Russian Empire. Langstroth did not know about Prokopovich when he filed his patent.

At the same time, Johann Dzierżon and August von Berlepsch were developing similar systems in Germany. Dzierżon discovered bee space in 1848, before Langstroth. But his hive opened from the side, which was inconvenient.

Why did Langstroth win?

Vertical opening from above + precise adherence to bee space in all elements + publication of the book “The Hive and the Honey Bee” (1853) with drawings = mass distribution. Langstroth did not just invent the hive, he created a system and popularized it.

Conclusion

The Langstroth frame has been around for 173 years. That’s longer than most inventions from the 19th century. Horse-drawn carriages were replaced by cars, kerosene lamps by electricity, and the telegraph by the internet. But the Langstroth frame is still here. Why?

Because it solves a fundamental problem: how to extract honey without killing bees. Before 1851, this was impossible. After that, it became the norm. Langstroth gave beekeeping a language, a coordinate system. All subsequent innovations — foundation, honey extractors, queen excluders, migratory apiaries — were built on the basis of his frame.

Perhaps something fundamentally new will appear in the future. Flow Hive tried, but it did not become the new standard. Foundationless is not a new technology, but a return to the old. Polystyrene hives, monitoring sensors, automated feeding systems—all of these are additions to the Langstroth frame, not replacements for it.

So if you start beekeeping today, you will most likely start with the same design that your great-great-grandfather used in 1890. The only difference is that now you have plastic, stainless steel, and the internet with forums where you can find out why your bees built a cross-comb.

And yes, it still works. Maybe not perfectly. But it works.

FAQ