ZINUS AZ-BSLB-F
ZINUS Keenan Metal Mattress Foundation Instruction Manual
Model: AZ-BSLB-F
1. Product Overview
The ZINUS Keenan Metal Mattress Foundation is designed to provide a sturdy and reliable support system for your mattress. This all-in-one unit combines the functionality of a box spring and a bed frame, featuring a durable steel framework and integrated support legs. It is compatible with standard-sized headboards through included brackets.
This foundation is engineered for longevity and ease of assembly, with all necessary parts and tools conveniently packaged in one box.

Image 1.1: The ZINUS Keenan Metal Mattress Foundation in Off-white, Full size, providing a solid base for a mattress.
2. Setup and Assembly
Assembly of the ZINUS Keenan Metal Mattress Foundation is designed to be straightforward. All components, including tools and instructions, are packaged within a single box.
2.1 Unpacking
- Carefully open the packaging and remove all components.
- Verify that all parts listed in the instruction manual are present.
- Keep the packaging materials until assembly is complete, in case any parts need to be returned or replaced.
2.2 Assembly Steps
Follow the diagrams provided in the included instruction manual for detailed assembly steps. The general process involves:
- Assemble the main metal frame components. Ensure all connections are secure.
- Insert the crossbars into their designated slots. These typically snap into place without additional fasteners.
- Carefully wrap the fabric cover around the assembled frame. Ensure it is properly aligned.
- Zip the cover closed. This step may require some adjustment to ensure a snug fit.
- Attach the support legs to the frame. Ensure they are tightened securely.
- If attaching a headboard, use the included headboard brackets. Note that hardware for attaching the headboard to the brackets is not included and must be sourced separately.

Image 2.1: The robust metal frame structure of the foundation before the fabric cover is applied.

Image 2.2: Close-up view of the integrated headboard bracket, designed for attaching a standard headboard.
3. Operating Instructions
Once assembled, the ZINUS Keenan Metal Mattress Foundation is ready for use.
3.1 Placing the Mattress
- Carefully place your mattress directly onto the assembled foundation.
- Ensure the mattress is centered and evenly distributed over the foundation's surface.
3.2 Headboard Attachment (Optional)
- If you wish to attach a headboard, align its mounting points with the foundation's headboard brackets.
- Secure the headboard using appropriate hardware (not included). Ensure all connections are tight and stable.

Image 3.1: The foundation supporting a mattress and bedding in a bedroom setting.
4. Maintenance and Care
To ensure the longevity and appearance of your ZINUS Keenan Metal Mattress Foundation, follow these simple care instructions:
- Cleaning: Wipe the metal frame and fabric cover with a dry cloth as needed to remove dust and debris. Avoid using harsh chemicals or abrasive cleaners, which may damage the finish or fabric.
- Inspection: Periodically check all bolts and connections to ensure they remain tight. Re-tighten if necessary to maintain stability.
- Weight Capacity: Adhere to the specified weight limits: 350 lbs for Twin size, and 700 lbs for Full, Queen, and King sizes. Exceeding these limits may compromise the foundation's structural integrity.
5. Troubleshooting
5.1 Squeaking Noises
If you experience squeaking noises from the foundation:
- Check Connections: Ensure all bolts and fasteners are securely tightened. Loose connections are a common cause of squeaking.
- Re-assemble: If squeaking persists, disassemble and re-assemble the unit, paying close attention to the tightness of all connections and the proper seating of all components.
- Floor Surface: Ensure the foundation is placed on a level surface. Uneven floors can cause stress on the frame, leading to noise.
5.2 Instability or Wobbling
If the foundation feels unstable or wobbles:
- Legs: Verify that all support legs are firmly attached and evenly touching the floor. Adjust if necessary.
- Frame Assembly: Confirm that the main frame components are correctly assembled and all connections are tight.
- Weight Distribution: Ensure the mattress and any occupants' weight are distributed evenly and do not exceed the stated weight capacity.
6. Specifications
| Brand | ZINUS |
| Model Number | AZ-BSLB-F |
| Product Dimensions (Full) | 74"L x 53"W x 14"H |
| Item Weight | 40.7 pounds |
| Color | Off-white |
| Material | Alloy Steel (Frame), Fabric (Cover) |
| Weight Capacity (Twin) | 350 lbs |
| Weight Capacity (Full, Queen, King) | 700 lbs |
| Assembly Required | Yes |
| Included Components | Foundation, Headboard Brackets, Installation Manual, Legs, Slats |

Image 6.1: Diagram illustrating the dimensions of the ZINUS Keenan Metal Mattress Foundation.
7. Warranty Information
The ZINUS Keenan Metal Mattress Foundation comes with a 5-year limited warranty. This warranty covers manufacturing defects and material flaws under normal use. Please refer to the warranty documentation included with your product for full terms and conditions, including details on how to make a claim.
8. Customer Support
For further assistance, missing parts, or warranty claims, please contact ZINUS customer support.
- Online Support: Visit the official ZINUS website for support resources, FAQs, and contact information.
- Included Documentation: Refer to the user guide or installation manual provided in the product packaging for additional details.
Ask a question about this manual
Ask about setup, troubleshooting, compatibility, parts, safety, or missing instructions. Manuals+ will review the question and use this page’s manual context to help answer it.



