When your existing shelving system runs out of room, this 4-post single entry adder unit lets you extend your storage capacity without starting over. Designed to connect to a compatible 4-post shelving starter bay, it adds a full-height column of 7 openings at 42'' W x 16'' D x 88.25'' H - giving you organized, accessible storage space that scales with your operation. Whether you are managing files, binders, supplies, or equipment in an office, archive room, library, or facility, this adder unit keeps your storage layout consistent and efficient.

At 154 lbs, this is a substantial, commercial-grade unit built for long-term use. Installation by a Certified Installer is required to qualify for the full limited lifetime warranty, so plan for professional setup when ordering.

Adder units like this one are the practical choice when a single starter bay is no longer enough. Rather than purchasing a standalone shelving system, an adder shares a common upright with the adjacent bay, reducing the total number of posts needed and making the most of your floor space. With 7 openings across its full 88.25'' height, this unit provides consistent shelf spacing throughout, making it easy to organize and retrieve stored items. It fits naturally into environments where high-density, open-access shelving is already in use and more capacity is needed without a full system redesign.

Key Features:

• 7 Storage Openings: Provides multiple shelf levels across the full 88.25'' height, maximizing vertical storage capacity in a compact footprint.
• Adder Configuration: Designed to connect to an existing 4-post starter bay, sharing an upright to save floor space and reduce hardware compared to adding a standalone unit.
• 42'' W x 16'' D x 88.25'' H Footprint: A slim 16'' depth keeps aisles clear while the 42'' width and full height deliver meaningful storage volume.
• 154 lb Shipping Weight: Reflects a heavy-duty, commercial-grade build suited for demanding storage environments.
• Limited Lifetime Warranty: Covered for the life of the product for the original purchaser when installed by a Certified Installer with proof of purchase.
• Made in the USA: Manufactured domestically for consistent quality and reliable lead times.

This 4-post single entry adder shelving unit is a straightforward way to grow an existing open shelving system. With 7 openings, a full 88.25'' height, and a 16'' depth that keeps your layout lean, it is well suited for offices, records rooms, supply areas, and similar environments where organized, accessible storage matters. Professional installation is recommended to ensure proper assembly and full warranty coverage.