In this article
- What is a Langstroth hive?
- What is bee space and why does it matter?
- What are the standard box dimensions?
- How big are Langstroth frames?
- What parts make up a complete Langstroth hive?
- When should you add a box?
- Deep, medium or all-medium: which setup should you choose?
- How do dimensions affect inspections and honey harvest?
- Tips if you build your own boxes
- Where to go next
What is a Langstroth hive?
The Langstroth hive is the most widely used movable-frame hive in the United States. It is named after Rev. Lorenzo Langstroth, who in the 1850s described bee space and designed boxes in which frames hang free of the walls, so a beekeeper can lift them out without tearing comb.
Texas A&M AgriLife Extension’s Beekeeping Equipment: Hive Boxes explains that Langstroth boxes come in three depths — deep, medium and shallow — in 10-frame or 8-frame widths. All boxes of the same width share the same length and width, which is why they stack.
What is bee space and why does it matter?
Honey bees treat gaps in a predictable way:
| Gap | What the bees do |
|---|---|
| Smaller than about 1/4 inch (6 mm) | Seal it with propolis |
| About 1/4 to 3/8 inch | Leave it open as a walkway — this is bee space |
| Larger than 3/8 inch | Fill it with burr comb |
Texas A&M puts it plainly: burr comb is what bees build to close spaces greater than 3/8 of an inch. That is why Langstroth dimensions matter. A box built a little too tall, or a medium frame dropped into a deep box, leaves an oversized gap. The bees fill it with wax, frames get glued together, inspections slow down, more bees get crushed and the queen is put at risk.
What are the standard box dimensions?
These are the nominal dimensions most U.S. suppliers use for 10-frame equipment. Metric conversions are rounded.
| Box | Height | Typical use |
|---|---|---|
| Deep (brood box, hive body) | 9 5/8” (≈ 244 mm) | Brood nest at the bottom of the hive |
| Medium (Illinois or western super) | 6 5/8” (≈ 168 mm) | Honey supers, or brood in all-medium setups |
| Shallow | 5 11/16” (≈ 145 mm) | Honey supers and comb honey |
| 10-frame box measurement | Approximate value |
|---|---|
| Outside length | 19 7/8” (≈ 505 mm) |
| Outside width | 16 1/4” (≈ 413 mm) |
| Inside length | 18 3/8” (≈ 467 mm) |
| Inside width | 14 3/4” (≈ 375 mm) |
| Wall thickness | About 3/4” nominal (often 11/16” to 3/4” actual) |
Eight-frame boxes keep the same length and heights but are narrower — about 14” wide outside. That matters when a full 10-frame deep of honey can weigh well over 60 pounds and a full medium around 40 to 50.
Dimensions vary by a fraction of an inch between manufacturers. Before mixing equipment from different suppliers, measure a box you already own.
How big are Langstroth frames?
Frames are shorter than their boxes; the difference leaves bee space above or below them.
| Frame | Approximate size (length × depth) | Box |
|---|---|---|
| Deep | 19” × 9 1/8” | Deep |
| Medium | 19” × 6 1/4” | Medium |
| Shallow | 19” × 5 3/8” | Shallow |
The top bar’s ears rest on a rabbet cut into the short sides of the box. Wider end bars at the top keep frames evenly spaced so bee space is maintained between them. Texas A&M also stresses that each frame size must go in its matching box.
What parts make up a complete Langstroth hive?
From the ground up:
- Hive stand. Keeps the hive off damp ground and at a workable height.
- Bottom board. Solid or screened; a screened bottom with a sticky board can help with mite monitoring.
- Entrance reducer. Narrows the entrance for small colonies, cold weather or robbing.
- Brood boxes. One or two deeps (or two to three mediums) where the queen lays.
- Queen excluder (optional). A grid that lets workers through but not the queen.
- Honey supers. Mediums or shallows above the brood nest.
- Inner cover. Separates the top box from the lid and creates an insulating air space.
- Telescoping outer cover. The weatherproof lid.
- Bottom board — base with the entrance
- Brood box (deep) — where the queen and brood live
- Frame — holds the wax comb
- Queen excluder — optional; keeps the queen out of the super
- Honey super — where bees store surplus honey
- Inner cover — with a center hole
- Outer (telescoping) cover — the weatherproof lid
When should you add a box?
Texas A&M advises against giving bees more space than they need, because the colony has to heat and defend the whole volume. A common rule from the same guide: add a box when bees have drawn comb on at least 80% of the frames in the top box — about 8 of 10 frames. Too early chills the brood nest and invites pests; too late crowds the colony and encourages swarming.
Deep, medium or all-medium: which setup should you choose?
| Setup | Pros | Cons |
|---|---|---|
| Two deeps + medium supers | Classic configuration; lots of brood space | Heavy deeps; two frame sizes to stock |
| All mediums | One frame size throughout; lighter boxes | More boxes and frames to buy and inspect |
| Eight-frame equipment | Lighter at every size | Less room per box; fewer used parts available |
Penn State Extension’s Beekeeping Basics covers equipment choices along with colony biology and seasonal management — worth reading before you place your first order.
How do dimensions affect inspections and honey harvest?
Standard dimensions are not just about fitting boxes together. They shape how you work the hive all season:
- Weight. A deep full of honey is the heaviest box you will ever lift. Many beekeepers keep deeps for brood only and use mediums or shallows for honey so a full super stays manageable.
- Interchangeable frames. If every box is the same depth, you can move brood or honey frames anywhere in the hive — useful when equalizing colonies or making splits.
- Extractor fit. Check that your extractor’s baskets take the frame depths you use; many small extractors handle mediums and shallows more easily than deeps.
- Spacing at inspection. When you return frames, push them together tightly. Uneven spacing creates gaps larger than bee space and invites burr comb, especially in honey supers where some beekeepers run nine frames in a ten-frame box on purpose to get thicker comb.
- Ventilation and moisture. A properly fitted inner cover and outer cover keep the bee space above the top bars. Gaps from warped or poorly built boxes let in robbers, rain and cold drafts.
Whatever you choose, write it down and stay consistent. Mixed widths and depths in one apiary are the most common source of frustration for second-year beekeepers.
Tips if you build your own boxes
- Use dry, seasoned lumber. Wood that shrinks after assembly changes bee space.
- Cut heights precisely. Box height is the measurement that causes the most problems when it is off.
- Use strong joints (finger or box joints, or rabbets) with exterior glue and nails or screws.
- Paint only the outside with a low-VOC exterior paint; leave the interior bare.
- Cut the frame rest rabbet accurately so the top bars sit flush with the box edge minus bee space.
Where to go next
If you are just starting out, read our beekeeping for beginners guide for a first-year plan, from local rules to varroa monitoring.
Frequently asked questions
What are the dimensions of a 10-frame Langstroth deep?
About 19 7/8 inches long, 16 1/4 inches wide and 9 5/8 inches tall outside, with an inside of roughly 18 3/8 by 14 3/4 inches. Exact numbers vary by a fraction of an inch between manufacturers.
What is bee space?
The gap bees leave open to move through, roughly 1/4 to 3/8 inch. Smaller gaps get sealed with propolis and larger ones get filled with burr comb. Langstroth equipment is built around bee space so frames stay removable.
Can I put medium frames in a deep box?
Texas A&M Extension warns against it. A short frame in a tall box leaves a gap larger than bee space, and the bees fill it with burr comb that glues frames together and makes inspections harder.
Should I choose 8-frame or 10-frame equipment?
Ten-frame equipment is the most common and easiest to find parts for. Eight-frame boxes are narrower and lighter when full of honey, which helps if lifting is an issue. Pick one width and stick with it.
Why do some sources list different deep box heights?
Manufacturers and regions round differently, so you may see 9 9/16 or 9 5/8 inches for a deep and 5 3/4 or 5 11/16 for a shallow. Compare with a box you already own before mixing suppliers.