1. Important Safety Information
Please read and understand all instructions before assembling and using this bunk bed. Keep this manual for future reference.
- Weight Capacity: Each bunk is designed to support a maximum weight of 350 lbs. Do not exceed this limit.
- Mattress Requirements: Use only mattresses that are 4-6 inches thick. Ensure the mattress fits snugly within the bed frame to prevent entrapment.
- Guardrails: The top bunk features a 13-inch high full-length guardrail for safety. Ensure all guardrails are properly installed and secured before use.
- Anti-Tipping Kit: An anti-tipping kit is included to secure the bed to the wall, preventing accidental tipping. Install this kit as instructed during assembly.
- Age Recommendation: The top bunk is not suitable for children under 6 years of age.
- Ventilation: Ensure adequate ventilation around the bed.
- No Jumping: Do not allow jumping on the bed.
- Regular Checks: Periodically check all connections and hardware to ensure they remain tight and secure.

Image: Top bunk featuring a 13-inch high full-length guardrail for enhanced safety.

Image: Detail showing rounded edges on the bed frame and the installation of the anti-tipping kit for stability.

Image: Visual representation of ASTM F1427-21e1 and CPSC certifications, indicating rigorous safety testing.
2. Package Contents
Before beginning assembly, ensure all parts listed below are present and undamaged. If any parts are missing or damaged, do not proceed with assembly and contact customer support.
- Headboard components
- Guardrails
- Bed frame components (side rails, support beams)
- Metal slats
- Ladder components
- Installation Manual
- Hardware pack (screws, bolts, nuts, Allen wrench)
- Anti-tipping kit
3. Setup and Assembly
Assembly typically requires two people and can be completed in approximately one hour. Follow the detailed instructions provided in the included installation manual. Ensure all connections are secure before use.
3.1 General Assembly Steps
- Unpack all components and verify against the parts list.
- Assemble the headboard and footboard sections for both the upper and lower bunks.
- Attach the side rails to the headboard and footboard sections, ensuring all bolts are tightened.
- Install the metal slats onto the bed frames. Ensure they are evenly spaced and securely fastened.
- Attach the guardrails to the top bunk frame.
- Assemble the ladder and attach it to the bunk bed frame. The ladder can be installed on either the left or right side.
- Install the anti-tipping kit by securing the bed to a wall stud.
- Place appropriate mattresses on both bunks.
3.2 Ladder Installation
The ladder is designed for flexible placement and can be installed on either the left or right side of the bunk bed to suit your room layout.

Image: Illustration showing the ladder being placed on either the left or right side of the bunk bed.

Image: Diagram demonstrating the flexibility of installing the ladder on either the left or right side of the bunk bed frame.
4. Operating Instructions
This bunk bed is designed for sleeping and resting. Adhere to the following guidelines for safe operation:
- Weight Distribution: Distribute weight evenly across the bed surface. Avoid concentrating heavy loads in one area.
- Ladder Use: Always use the ladder to access the top bunk. Do not climb on the bed frame or guardrails.
- Mattress Fit: Ensure the mattress on both bunks fits securely within the frame to prevent gaps.
- Low Bottom Bunk: The low-to-the-ground design of the bottom bunk facilitates easy access for younger children.

Image: Diagram illustrating the overall dimensions of the bunk bed and the 350 lbs weight limit per bunk.

Image: Close-up view of the heavy-duty metal slats designed to support up to 350 pounds without a box spring.

Image: The bottom bunk positioned low to the ground, making it easy for children to climb in and out.
5. Maintenance and Care
Proper maintenance ensures the longevity and safety of your bunk bed.
- Cleaning: Wipe the metal surfaces with a dry cloth to remove dust and dirt. Avoid abrasive cleaners or harsh chemicals that could damage the finish.
- Inspections: Periodically inspect all bolts, screws, and connections to ensure they are tight. Re-tighten if necessary.
- Rust Prevention: The metal is designed to resist chipping and rusting indoors. Keep the bed in a dry environment to prevent moisture buildup.
- Moving the Bed: When moving the bed, lift it rather than dragging it to prevent damage to the frame or floor.
6. Troubleshooting
If you encounter any issues with your bunk bed, refer to the following common solutions:
6.1 Bed Squeaks or Wobbles
- Solution: Check all bolts and screws. Tighten any loose connections. Ensure the bed is placed on a level surface.
6.2 Missing or Damaged Parts
- Solution: Do not attempt to assemble the bed with missing or damaged parts. Contact Bonnlo customer support immediately for replacements.
6.3 Difficulty Assembling
- Solution: Review the installation manual carefully. Ensure you have all necessary tools. If issues persist, consider seeking assistance from another person or contacting customer support.
7. Specifications
| Feature | Detail |
|---|---|
| Model Number | MTBB1G |
| Size | Twin Over Twin |
| Material | Metal |
| Product Dimensions (L x W x H) | 75" x 41" x 54" |
| Item Weight | 81 Pounds |
| Color | Grey |
| Style | Industrial |
| Special Features | Low Profile, No Box Spring Needed, Slatted, Space Saving Design |
| Required Assembly | Yes |
| Mattress Thickness Recommendation | 4-6 inches |

Image: The Bonnlo Twin Over Twin Metal Bunk Bed in Grey, showcasing its design and space-saving features in a bedroom setting.

Image: The bunk bed positioned in a compact child's room, demonstrating its effectiveness in saving space.
8. Warranty Information
For specific warranty details regarding your Bonnlo Twin Over Twin Metal Bunk Bed, please refer to the warranty card included with your purchase or visit the official Bonnlo website. Warranty terms typically cover manufacturing defects and material flaws under normal use.
9. Customer Support
If you have any questions, require assistance with assembly, or need to report missing/damaged parts, please contact Bonnlo customer support:
- Website: Refer to your purchase documentation for the official Bonnlo support website.
- Email/Phone: Contact information can typically be found on the product packaging or the manufacturer's website.
Please have your model number (MTBB1G) and purchase date available when contacting support.