Knowledge What are the three standard frame depths used in the National Beehive system? Guide to 140mm, 215mm & 304mm Frames
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Tech Team · HonestBee

Updated 2 days ago

What are the three standard frame depths used in the National Beehive system? Guide to 140mm, 215mm & 304mm Frames


The National Beehive system relies on three standardized frame depths to balance colony management with beekeeper ergonomics. Specifically, these are the Shallow frame (140mm) for honey supers, the Standard Brood frame (215mm) for the main colony, and the Deep frame (304mm) for expanded brood rearing.

Understanding frame depth is critical for managing hive weight and colony expansion. While shallow frames prioritize lifting ease for honey harvest, deeper frames maximize uninterrupted brood space for the queen.

The Anatomy of National Frames

Shallow Frames (140mm / 5.5 inches)

These frames are designed exclusively for honey supers, the upper boxes where bees store surplus honey.

Because honey is dense and heavy, using a shallower frame ensures the box remains light enough for the beekeeper to lift when full.

Standard Brood Frames (215mm / 8.5 inches)

This is the most common size found in the standard brood box of a National hive.

It provides a balanced surface area for the queen to lay eggs while keeping the brood box manageable for routine inspections.

Deep Frames (304mm / 12.0 inches)

Often referred to as 14 x 12 or B.S. Deeps, these extra-deep frames require a specific, larger brood box.

They are designed to provide a massive, uninterrupted area for brood rearing, which mimics the natural nest structure of prolific colonies.

Understanding the Trade-offs

Weight vs. Capacity

The primary trade-off in frame selection is physical weight. A box full of Deep (304mm) frames allows for a large colony but can be incredibly heavy to move.

Conversely, Shallow frames are ergonomic but require more boxes to achieve the same volume of storage.

Compatibility Limitations

You typically cannot mix frame depths within a single box.

Putting a shallow frame in a deep box induces bees to build "wild comb" at the bottom, while a deep frame will not fit into a standard box.

Inspection Ergonomics

Large 14 x 12 frames can be unwieldy to handle.

Lifting a fully drawn Deep frame covered in bees requires significant wrist strength and careful handling to avoid crushing the bees or rolling the queen.

Making the Right Choice for Your Goal

Selecting the correct frame depth is about matching the equipment to your physical capabilities and your colony management style.

  • If your primary focus is ergonomic management: Stick to Standard Brood frames and Shallow supers to keep individual lifting weights manageable.
  • If your primary focus is maximizing colony population: Consider the Deep (304mm) frames to provide a massive, single area for the queen to lay without needing a second brood box.
  • If your primary focus is honey production: Ensure you have an ample supply of Shallow frames, as these allow for easy removal and extraction of the harvest.

Standardization allows you to interchange components easily, provided you match the frame to the correct box size.

Summary Table:

Frame Type Depth (mm) Common Name Primary Use Key Benefit
Shallow 140mm Honey Super Frame Honey storage Lightweight and easy to lift for harvest
Standard 215mm Brood Frame Main brood box Balanced size for routine inspections
Deep 304mm 14 x 12 / B.S. Deep Expanded brood nest Maximizes uninterrupted egg-laying area

Scaling Your Apiary Operations with HONESTBEE

Choosing the right frame depth is just the beginning of efficient colony management. At HONESTBEE, we specialize in supporting commercial apiaries and distributors with high-quality, standardized beekeeping equipment. From precision-engineered hive-making and honey-filling machines to the full spectrum of frames, tools, and essential industry consumables, we provide the infrastructure your business needs to thrive.

Whether you are looking to source wholesale beekeeping hardware or unique honey-themed cultural merchandise to expand your retail portfolio, our team is ready to deliver professional solutions tailored to your scale.

Ready to optimize your supply chain?
Contact HONESTBEE today for a comprehensive wholesale consultation!

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