Roll-Out Shelf Rack Add-On 48" Wide 85" High – 4 Shelves

Need a starter unit first? View the matching RSR437-4 / RSR447-4 Starter Unit →

Expand your existing RSR system — same height, same depth, seamless integration.

The RSR437-4A and RSR447-4A are add-on units designed to extend a Roll-Out Shelf Rack starter system into a continuous row. Each add-on shares the vertical frame of the adjacent starter unit, eliminating redundant uprights and maximizing your floor space efficiency.

Each add-on includes 4 roll-out shelves plus 1 fixed top shelf — 5 usable storage levels and up to 10,000 lb of combined capacity — matching the starter unit configuration exactly. Choose the depth that matches your existing starter: 36" depth pairs with RSR437-4, and 48" depth pairs with RSR447-4.

Overall width increases by 4" with each add-on unit added to a row. Ships knocked down with all components included. Assembly required — floor anchors required but not included.

What's Included

• Structural 3" channel frame
• X-braces and floor braces
• 4 roll-out shelf assemblies with ball roller tracks and spring locks
• 1 fixed top shelf
• Shelf brackets adjustable on 2" centers
• All hardware for assembly

Note: Floor anchors are not included. Must be used with a compatible RSR starter unit of the same height and depth configuration. Do not mix heights or depths within a row.

Why expand with an add-on

Shared uprights, more storage — Add-on units attach to the existing starter frame, sharing the vertical structure. This eliminates the cost and footprint of a second starter unit while adding a full bay of roll-out storage.

Same roll-out performance — Every shelf extends 100% on the same ball roller track system as the starter, with the same spring lock safety mechanism and 2,000 lb per shelf capacity.

5 usable storage levels — 4 roll-out shelves plus 1 fixed top surface, matching the starter unit exactly across the full row.

Compatibility is critical — RSR437-4A (36" depth) pairs with RSR437-4 only. RSR447-4A (48" depth) pairs with RSR447-4 only. Do not mix heights or depths within a row.

Questions before ordering? Call (929) 577-4339 or email support@mywarehouseworld.com.

Specifications

Important: Capacities are based on evenly distributed loads. Extend only one shelf at a time. Do not exceed 2,000 lb per shelf. Unit must be level and anchored to the floor before use. See assembly instructions for full requirements. Add-on units must only be used with compatible RSR starter units of matching height and depth.

Customization Options

Contact us to discuss the following:

Additional Roll-Out Shelves — Additional shelves are available for both depth configurations. Contact us for pricing.

Pre-Assembled Units — This unit is available fully pre-assembled and ready for immediate use. Ships at additional cost. Contact us for pricing and lead time.

Custom Colors — Available at additional cost.

To discuss customization options, call (929) 577-4339 or email support@mywarehouseworld.com.

Shipping & Returns

Shipping

This product ships as industrial freight via motor carrier from Omaha, NE. A forklift or suitable lifting device is required to unload — standard liftgate service is not available due to the size and weight of this product.

Freight cost is calculated at checkout based on your delivery location.

Estimated lead times based on total order value:

Lead times are based on total order value and may vary. If you have a delivery deadline or need to hold shipment until your facility is ready, we can coordinate directly with the supplier.

Freight quotes are subject to change without notice. A 3.9% service fee applies to all credit card transactions. Tracking provided via email once your order ships.

Returns

To initiate a return, contact us at support@mywarehouseworld.com or (929) 577-4339 within 30 days of delivery.