Construct Wider Center Shelves
From Under-Stair Shelving · Step 2 of 10 · Video by Specific Love Creations

Showing 2:57–3:12 of the source video. Watch the full video with every moment.
What happens in this clip
Build two additional shelves that are slightly wider than the previous ones. These will form the center section of the entire storage unit. Each wider shelf will use one 64-inch board in the middle and one 67-inch board on each side. Follow the same assembly process as before: lay out the boards on a flat surface, ensure correct crown orientation, clamp, pre-drill, and secure with 2.5-inch deck screws.
Goal: Assemble two wider shelf frames to be used as center connecting shelves.
What's used
Tools
- 2.5-inch Deck Screws
- 64-inch Lumber pieces
- 67-inch Lumber pieces
- Clamps
- Drill Bit
- Drill Ridgid
About the full video
This DIY project provides detailed instructions for building heavy-duty, space-saving wooden shelves in a garage, specifically designed to fit into narrow spaces while still allowing a car to be parked and its doors to open comfortably. The shelves are constructed from 2x4 lumber and are built to be sturdy enough to hold various items like oil, cleaning supplies, plastic boxes, and tools.
Step 2 of 10: Design the Shelving Unit
Sketch out a design for your shelving unit. Decide on the type of shelves (fixed or adjustable), the spacing between them (consider the items you plan to store), and the overall structural support needed. You can opt for a simple bookcase style or a more complex, custom-built unit that follows the angle of the stairs. Consider whether the back of the unit will be open or against the wall.
Every video in Under-Stair Shelving
Step 1: Measure the Under-Stair Space
- 1:09–1:46 Measure, Cut, and Test-fit
- 0:09–1:25 Initial Measurements and Platform Design
Step 2: Design the Shelving Unit
- 0:13–0:17 Install Modular Shelving Frames
- 2:57–3:12 Construct Wider Center Shelves (this video)
Step 3: Create a Cut List
- 3:46–5:30 Create Cut List and Verify Thickness
- 0:38–1:39 Prepare Lumber and Cut List
- 0:02–0:04 Cut and Prepare Lumber
Step 4: Purchase Materials
- 0:00–0:03 Gather Materials and Tools
- 0:00–0:17 Gather Materials and Tools
- 0:00–0:49 Gather Tools and Materials
Step 5: Cut the Materials
- 1:03–2:43 Cut All Lumber to Size
- 1:18–1:29 Cut Timber to Length
- 0:11–0:58 Cut and Rip Lumber
Step 6: Sand All Pieces
- 1:24–1:29 Sand All Components
- 2:06–2:19 Sand All Cut Pieces
- 0:27–0:30 Sand Wood Pieces
Step 7: Assemble the Main Frame
- 2:26–2:55 Assemble Main Shelf Box
- 1:05–1:57 Assemble Vertical Side Frames
- 0:06–0:11 Assemble the Main Frame
Step 8: Install Shelves
- 5:42–6:03 Install Reinforced Shelves
- 4:56–5:53 Install Internal Divider Shelves
- 5:19–5:45 Install Shelves
Step 9: Finish the Unit
- 0:39–0:49 Paint and Install Hardware
- 0:43–0:49 Paint All Wood Components
- 12:47–13:48 Apply Wood Finish
Step 10: Install the Shelving Unit
- 3:20–4:12 Install & Secure Bookcase in Alcove
- 3:22–6:20 Install Shelf Units and Supports
- 0:13–0:17 Install Modular Shelving Frames
Questions about Under-Stair Shelving
What are the essential tools I need for accurate measurements in an angled under-stair space?
Beyond a standard measuring tape and pencil, an angle finder or a protractor is crucial for accurately capturing the slope of the stairs. Also, a long straight edge or level will help you mark level lines and check for plumb, ensuring your shelves are straight and true despite the angled surroundings.
Beyond basic hand tools, what power tools would make this under-stair shelving project easier for a beginner?
A miter saw or circular saw with a guide will significantly improve the accuracy and speed of cutting your lumber, especially for repetitive cuts and angles. An electric orbital sander is also highly recommended to efficiently prepare all pieces for finishing, saving you hours compared to hand sanding.
What are the most important safety precautions I should take when cutting and assembling lumber for this project?
Always wear safety glasses to protect your eyes from sawdust and flying debris. Use hearing protection when operating power tools and ensure your work area is clean and well-lit to prevent accidents. Make sure all lumber is securely clamped or supported before cutting to avoid kickback.
The project is listed as 'beginner' and '3 days'. Is this estimated time realistic for someone completely new to woodworking?
While classified as beginner, the 3-day estimate often assumes some prior familiarity with tools and a focused work schedule. If you're completely new, allow for extra time, especially for careful measuring, precise cutting, and thorough finishing, as these steps are critical for a professional-looking result. Don't rush the process.
What's a common mistake beginners make when measuring for under-stair shelving, and how can I avoid it?
A frequent mistake is not fully accounting for irregularities in the wall or floor, or failing to precisely capture the stair's varying angles, leading to shelves that don't fit snugly. To avoid this, create a detailed template using cardboard or scrap material for complex angles, and always 'measure twice, cut once' to confirm dimensions.
Are there alternative materials to dimensional lumber that might be easier for a beginner or offer a different look for under-stair shelving?
Plywood or MDF (medium-density fiberboard) can be good alternatives, often providing flatter surfaces and being easier to cut into large panels for shelves and backs. These materials typically require edge banding or painting for a finished appearance, which might add a different aesthetic and complexity to the finishing steps. Consider pre-made shelving kits for the simplest approach, though customization will be limited.
Under-Stair Shelving
Design and construct open shelving or a bookcase unit to fit within the under-stair space, maximizing storage and aesthetic appeal.
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