Important Safety Information
WARNING: Do not exceed the maximum weight capacity of 300 pounds (136 kg) for the mattress and sleeper combined. Exceeding this limit may result in injury or damage to the product.
Product Overview
The GRUSIGN 7-Inch Queen Box Spring is a metal mattress foundation designed to provide robust support for various mattress types, including memory foam, latex, and spring mattresses. Its heavy-duty steel frame and welded joints ensure stability and durability, preventing mattress sagging. The box spring features a noiseless design for a quiet sleep environment and includes a removable, washable cotton cover for easy maintenance.
This 7-inch high box spring offers a low-profile aesthetic and can be used independently or integrated into existing bed frames. Assembly is designed to be straightforward with all necessary tools included.

Image: The GRUSIGN 7-inch Queen Box Spring installed on a bed frame, supporting a mattress.

Image: Illustration demonstrating the box spring as a separate component, placed between a bed frame and a mattress.
Package Contents
Before assembly, verify that all components are present and undamaged. Refer to the included instruction manual for a detailed parts list.
- Metal Frame Components
- Fabric Cover
- Assembly Tools (e.g., Allen wrench)
- Instruction Manual

Image: An exploded diagram showing the individual metal frame components and fasteners required for assembly.
Setup and Assembly Instructions
Assembly typically takes 30-45 minutes. No additional tools are required beyond those provided.
- Unpack Components: Carefully remove all parts from the packaging and lay them out on a clean, flat surface. Verify against the parts list in the included manual.
- Assemble Frame Sections: Connect the metal frame components as per the diagrams. Ensure all connections are secure.
- Secure Joints: Use the provided screws and tools to tighten all connections, ensuring the frame is stable and free of wobbles.
- Install Fabric Cover: Once the metal frame is fully assembled, carefully place the fabric cover over the frame, ensuring a snug fit.
- Final Placement: Position the assembled box spring on your bed frame or directly on the floor if using as a standalone foundation.
Video: A detailed guide demonstrating the quick assembly process for the GRUSIGN box spring, showing step-by-step instructions.

Image: Detailed views of the reinforced steel frame and secure connection points.

Image: A visual guide outlining the five main steps for quick assembly of the box spring.
Operating Instructions
The GRUSIGN 7-Inch Queen Box Spring is designed to support your mattress and provide a stable sleeping surface. Place your mattress directly on top of the assembled box spring. Ensure the mattress is centered and evenly distributed on the foundation.
This box spring is compatible with various mattress types, including memory foam, latex, and traditional spring mattresses. Its low-profile design allows for versatile use with most bed frames or as a standalone foundation.
Video: An overview of the GRUSIGN box spring, highlighting its features and how it functions as a mattress foundation.
Maintenance
- Cleaning the Fabric Cover: The included cotton fabric cover is removable and machine-washable. Follow the care instructions on the cover's label for best results.
- Frame Inspection: Periodically check all screws and connections to ensure they remain tight. Retighten if necessary to maintain stability and prevent noise.
- General Cleaning: Wipe the metal frame with a damp cloth as needed. Avoid harsh chemicals that may damage the finish.

Image: Detail of the removable, washable fabric cover, emphasizing its cleanliness and breathability.
Troubleshooting
Squeaking Noises
If you experience squeaking, re-check all frame connections. Ensure all screws are securely tightened. The box spring is engineered with anti-squeak technology, so loose connections are the most common cause of noise.
Instability or Wobbling
Verify that the box spring is placed on a flat, level surface. Re-check all assembly points to ensure components are correctly aligned and tightened. If used with a bed frame, ensure the bed frame itself is stable.
Mattress Sagging
While the box spring is designed to prevent mattress sagging, ensure your mattress is compatible with a solid foundation. If sagging persists, inspect the box spring for any damaged components or consult the manufacturer.
Specifications
| Feature | Detail |
|---|---|
| Brand | GRUSIGN |
| Model Number | PTC |
| Size | Queen |
| Material | Metal |
| Product Dimensions (L x W x H) | 79.1" x 59.4" x 7" |
| Item Weight | 34.8 Pounds |
| Weight Capacity (Mattress & Sleeper Combined) | 300 lbs (136 kg) |
| Assembly Time | 30-45 minutes (approx.) |
| Included Components | Tool and Instruction |

Image: Product dimensions and weight capacity details.
Warranty Information
GRUSIGN products are manufactured to high-quality standards. For specific warranty details, please refer to the warranty card included with your product or contact GRUSIGN customer support. Keep your purchase receipt for warranty claims.
Customer Support
If you have any questions, require assistance with assembly, or need to report a missing/damaged part, please contact GRUSIGN customer support. Refer to the contact information provided in your product packaging or visit the official GRUSIGN website.
Online Resources: GRUSIGN Store on Amazon