What Is a Regular Slotted Container (RSC)?

What it is and why it matters

A Regular Slotted Container, commonly called an RSC, is the standard corrugated box design you most often see in warehouses and on delivery trucks. Each of the four top flaps is the same length, and the two outer flaps meet in the middle of the box when closed. This simple geometry makes the RSC easy to manufacture, stack, and seal, and it provides reliable protection for a vast range of goods.

Basic anatomy

• Board material: Typically made from single-wall, double-wall, or occasionally triple-wall corrugated board, depending on strength needs.
• Flaps: Four top and four bottom flaps; outer flaps meet at the centerline when closed.
• Depth, width, length: Interior box dimensions determine how an RSC fits a product. Boxes are usually specified with length (L), width (W), and depth/height (H).
• Sealing method: Commonly closed with tape, glue, or staples. Tape closure along the center seam is standard for shipping.

Common uses

Because of its straightforward design, the RSC is used for nearly every type of shipping and storage need: consumer goods, electronics, apparel, bulk food items, books, parts, and more. It’s the go-to option for fulfillment centers, distribution warehouses, and manufacturers who need a balance of economy and protection.

Why RSC is economical

Manufacturers can produce RSCs quickly and with minimal waste because the box blank is an efficient shape for die-cutting from corrugated sheets. The uniform flap sizes mean simple scoring and folding processes. For shippers, the standardization helps reduce the need to stock many custom box styles.

Performance and protection

An RSC protects products primarily by providing a rigid outer shell that resists crushing and puncture. Protection can be enhanced with appropriate corrugated board strength (e.g., single vs double wall), internal cushioning (bubble wrap, foam, or paper), and correct palletization.

Variants and related styles

• Full overlap slotted container (FOL): Similar to an RSC but with flaps that fully overlap for extra top/bottom protection.
• Half-slotted container (HSC): One side without flaps to allow for quick access or integration with machinery.
• Die-cut RSC: An RSC with custom cutouts or handles built into the blank for specific product needs.

Material choices and strength factors

Corrugated board is specified by flute type (A, B, C, E, etc.) and wall construction. A single-wall C-flute RSC is common for many retail items, while double-wall (e.g., BC or EB) is chosen for heavier or taller stacks. Box strength depends on board grade, box design (including corner support and closure), and the way contents are packed.

Practical example

Imagine shipping a small kitchen appliance. An RSC made from single-wall C-flute provides good crush resistance; the appliance is wrapped in protective foam inserts, placed in the box with voids filled using kraft paper, and sealed with filament or pressure-sensitive tape. This solution balances cost and protection for typical parcel delivery.

Beginner tips

• Measure products accurately (length, width, height) and choose an RSC size that leaves about 1-3 inches of cushioning space on all sides.
• Match board strength to weight and stacking expectations—heavier items or long-term storage often need stronger board types.
• Use standard tape sealing patterns (three-strip or H-tape) to ensure the top seam and edges are secure.

Environmental note

Corrugated RSCs are widely recyclable and often contain recycled fiber. Choosing the right size and minimizing void fill improves sustainability by reducing material use and shipping volume.

Final takeaway

The Regular Slotted Container is a foundational element of packaging and logistics. Its simple, adaptable design makes it an excellent first choice for beginners assessing packaging needs: it’s affordable, easy to source, and effective for protecting a wide range of products during storage and shipping.