1. Introduction
Thank you for choosing the BNSPLY 20x13 Metal Garage Shed. This manual provides essential information for the safe and efficient assembly, operation, and maintenance of your new storage solution. Please read all instructions carefully before beginning assembly and retain this manual for future reference.
2. Safety Information
WARNING: Assembly requires careful handling of heavy components. Ensure the structure is properly anchored to the ground to support the intended weight and usage. Always follow the provided instructions for safe assembly and use.
- Always wear appropriate safety gear, including gloves and eye protection, during assembly.
- Ensure the assembly area is clear of obstructions and level.
- Do not attempt to assemble the shed alone. A minimum of two people is recommended.
- Securely fasten all screws and bolts as instructed to ensure structural integrity.
- Do not climb on the roof of the shed.
- Keep children and pets away from the assembly area.
3. Product Overview
The BNSPLY 20x13 Metal Garage Shed offers a spacious and durable solution for your outdoor storage needs. Its robust design ensures protection against various weather conditions, providing a secure space for vehicles, tools, and other equipment.
Key Features:
- Large Storage Capacity: Approximately 250 sq. ft. of usable space, ideal for trucks, cars, tools, lawn machinery, and bicycles. Total storage volume is 1625 cubic feet.
- Durable & Sturdy Construction: Made with galvanized steel for rustproof, UV-resistant, and moisture-proof properties. Features reinforced thick metal beams and braces for enhanced roof support.
- All-Weather Protection: Waterproof design with a sloped roof to prevent water accumulation.
- Improved Ventilation: Equipped with 4 air vents to ensure proper air circulation, reducing odors and moisture buildup.
- Secure Access: Features hinged front double doors and a side door with locking holes and latches for enhanced security.
- Easy Assembly: All parts are numbered, pre-cut, and pre-drilled for straightforward installation.

Figure 1: Weather Resistance Features of the BNSPLY Metal Shed.

Figure 2: Detailed Dimensions of the BNSPLY 20x13 Metal Shed.

Figure 3: Interior View Highlighting Reinforced Structures and Storage Capacity.

Figure 4: Product Details: Air Vents, Lockable Door, Roof Connection, and Sturdy Base.
4. Setup and Assembly
The BNSPLY Metal Garage Shed is designed for straightforward assembly with pre-cut, pre-drilled, and numbered parts. It is recommended that at least two people work together to complete the installation, which may take a full day.
Important Pre-Assembly Steps:
- Before installation, it is highly suggested to lay a solid foundation (treated wood or concrete) and fix the expansion screws to prevent the shed from being blown away by wind. Do not place directly on grass.
- Unpack all components and verify against the parts list provided in your packaging.
Assembly Steps:
- Base Frame Assembly: Assemble the base frame first, ensuring it is level and securely fastened.
- Wall Frame Assembly: Construct the wall frames, attaching them to the base.
- Roof Frame Assembly: Assemble the roof frame components.
- Wall Panel Assembly: Attach the wall panels to the assembled wall frames. Ensure holes are aligned; stretching the panel may be necessary for proper fit.
- Roof Panel Assembly: Install the roof panels. The plastic protective gasket acts as a waterproof seal.
- Door Assembly: Assemble and install the doors, including hinges, latches, and handles.
Video 1: Detailed Assembly Guide for BNSPLY 13x20ft Metal Shed. This video demonstrates the step-by-step process for constructing the shed, including base, wall, roof, and door assembly.
5. Operating Instructions
Your BNSPLY Metal Garage Shed is designed for versatile use and easy access.
Access and Security:
- The hinged front double doors and side door provide convenient access for various items, from large vehicles to smaller tools.
- Utilize the integrated locking holes and latches to secure your belongings. It is recommended to add a padlock (not included) for enhanced security.
Ventilation:
- The 4 air vents facilitate cross-ventilation, which is crucial for preventing moisture buildup and maintaining a fresh environment inside the shed. Ensure vents are not obstructed.
Versatile Use:
- This shed is suitable for housing trucks, cars, various tools, lawn machinery, and bicycles.
- It can also be adapted for use as a workshop or a play area, helping to keep your outdoor spaces organized.
Video 2: Overview of the Heavy Duty Metal Shed, showcasing its robust construction and spacious interior.

Figure 5: Multi-Functional Applications of the BNSPLY Garage Shed.
6. Maintenance
Proper maintenance will extend the lifespan of your BNSPLY Metal Garage Shed.
- Cleaning: Regularly clean the exterior of the shed with mild soap and water to remove dirt and debris. Avoid abrasive cleaners that could damage the finish.
- Ventilation: Periodically check the 4 air vents to ensure they are clear of obstructions (e.g., leaves, bird nests) to maintain optimal airflow.
- Roof Inspection: Inspect the sloped roof periodically for any signs of damage or debris accumulation, especially after heavy rain or snow. Clear any snow buildup to prevent excessive load.
- Door Mechanisms: Lubricate door hinges and latches annually to ensure smooth operation and prevent rust.
- Anchoring: Regularly check the foundation and expansion screws to ensure the shed remains securely anchored, especially in areas prone to high winds.
7. Troubleshooting
If you encounter any issues with your BNSPLY Metal Garage Shed, please refer to the following common troubleshooting tips. For more complex problems, contact customer support.
- Water Leakage: Check all roof panel screws and ensure the plastic protective gaskets are properly seated. Verify that the roof panels overlap correctly and that the sloped roof design is maintained.
- Door Misalignment: Ensure the base frame is perfectly level. Adjust hinges or re-tighten frame screws if doors do not close smoothly.
- Excessive Moisture Inside: Verify that all 4 air vents are clear and unobstructed. Consider adding a dehumidifier if the shed is in a particularly humid environment or storing moisture-sensitive items.
- Loose Panels: Re-tighten any loose screws on wall or roof panels. If holes are misaligned, gently stretch the panel as shown in the assembly video.
8. Specifications
| Attribute | Value |
|---|---|
| Brand | BNSPLY |
| Color | Dark Gray |
| Material | Alloy Steel |
| Product Dimensions (D x W x H) | 233.9"D x 154.7"W x 91.3"H |
| Item Weight | 628 Pounds |
| Model Number | 20x13 Metal Garage Shed |
| Door Style | Double Hinged Doors |
| Water Resistance Level | Waterproof |
| Ultraviolet Light Protection | UV Protection |
| Required Assembly | Yes |
9. Warranty and Support
Your BNSPLY Metal Garage Shed comes with a 12-month warranty from the date of purchase. Additionally, we offer a 30-day return or replacement policy.
We are committed to protecting your rights and interests. If you have any questions, concerns, or require assistance with your metal building, please do not hesitate to contact our customer support team. We aim to resolve your concerns promptly, typically within 24 hours.
For support, please refer to the contact information provided with your purchase documentation or visit the official BNSPLY website.