This double-sided 4-post adder shelving unit is built to extend an existing shelving row, giving you more vertical storage capacity without consuming additional floor space. At 88.25'' tall with 7 openings and a 26'' depth on each side, it fits naturally into high-density storage environments such as file rooms, archives, supply areas, and institutional storage facilities. The adder configuration means it shares a common upright with an adjacent starter or adder unit, keeping your row tight and your aisle space intact.

Measuring 48'' W x 26'' D x 88.25'' H and weighing 133 lbs, this unit is a substantial, purpose-built component designed for organized, multi-bay shelving systems. Its double-entry design allows access from both sides of the row, making it well suited for back-to-back shelving layouts where staff need to retrieve items from either aisle.

Adder units like this one are the building blocks of scalable shelving rows. You start with a compatible starter unit and add as many adder bays as your space and storage needs require. The 7-opening layout across the full height of the unit gives you flexible shelf placement to accommodate binders, boxes, bins, or other stored materials. Because this unit is manufactured in the USA and backed by a limited lifetime warranty when installed by a Certified Installer, it is a long-term investment in your storage infrastructure. For facilities planning a new row or expanding an existing one, this adder unit delivers the depth, height, and access configuration to keep operations running efficiently.

Key Features:

• Double-Sided Access: Open from both sides of the row, supporting back-to-back shelving layouts and two-aisle retrieval workflows.
• 7 Openings: Generous number of shelf positions across the full 88.25'' height gives you flexible storage configuration for a wide range of materials.
• Adder Configuration: Designed to connect to an existing starter or adder unit, extending your row without requiring additional floor footprint per bay.
• Substantial Build: At 133 lbs and 48'' W x 26'' D x 88.25'' H, this is a full-height, heavy-duty shelving component built for demanding storage environments.
• Made in the USA: Domestically manufactured for consistent quality and reliable lead times.
• Limited Lifetime Warranty: Backed by a limited lifetime warranty for the original purchaser when installed by a Certified Installer, with qualifying replacement parts supplied for the product life.

This 4-post double-sided adder shelving unit is a practical choice for facilities that need to grow their storage row capacity in a structured, space-efficient way. Its 7-opening layout, full-height design, and double-entry access make it a versatile addition to file rooms, archives, warehouses, and institutional storage areas. Verify compatibility with your existing starter unit before ordering to ensure a proper row connection.