BS DN4 Hoffman Brood Frames & Pins Our BS DN4 Hoffman Brood Frames are precision-cut, self-spacing brood box frames designed for British National, WBC, and Smith hives (when the top bar lugs are shortened for Smith compatibility). These high-quality wooden frames are supplied flat-packed and include gimp pins for easy assembly. Product Description The DN4 Hoffman frame is the standard deep brood frame used in British National hives and their variants. It features Hoffman-style self-spacing side bars, eliminating the need for plastic or metal spacers and ensuring consistent frame spacing throughout the brood box. These frames are crafted from A-grade timber, providing excellent strength, durability, and a smooth finish for easy handling during hive inspections. DN4 frames are fully compatible with other National brood frame types (such as DN1) when used with spacers, offering flexibility for different hive setups. Compatibility Fits: British National, WBC, and Smith hives (with shortened top bar lugs for Smith hives). Type: Standard deep brood frame (DN4). Compatible with: DN1 frames (when plastic spacers are used). Assembly: Supplied flat-packed with gimp pins included. Features Self-spacing Hoffman side bars – maintain correct frame spacing without additional spacers. A-grade timber construction – strong, smooth, and long-lasting. Supplied flat-packed – easy to assemble using included gimp pins. Versatile compatibility – suitable for most standard British hive types. Ideal for brood rearing – provides optimal space for eggs, larvae, and stores. Frame Assembly Instructions Prepare Components:Check that you have all parts — top bar, bottom bar, two Hoffman side bars, and the supplied gimp pins. Assemble the Frame: Insert the side bars into the slots of the top bar. Fit the bottom bar into position, ensuring the frame is square and aligned. Secure all joints using gimp pins or small nails. Fit Foundation: Insert your wax or plastic foundation sheet. Secure the foundation using frame wire or melted wax to ensure it remains taut. Final Inspection: Make sure the frame is solid, square, and evenly spaced. Your assembled DN4 frame is now ready for installation in your brood box.
