Lumber Cart Build – Part 2 – Preparing the A-frame Parts
By Jack Barnhill On March 19th, 2011I began building the A-frame section of the lumber cart by cutting a second 4X8 sheet of OSB in half to create two 4X4 sheets that would form the sides of the A-frame structure.
Then I cut to size the shelf pieces, bin separators, and side retainer pieces from the sheet of OSB left over from cutting the top skin of the cart base and then I cut the bin separators to their final shape.
Cutting the bin separators to their final shape meant cutting a 5-degree taper on one of the long sides and a curve along the top edge (the top edge now being the wider of the two ends) making for easier access to shorter pieces of lumber in the bins. There are probably several ways to cut the 5-degree taper but, I chose to build a taper jig for the table saw (I’ll post a blog and SU model for that later).
To cut the curves, I first used a compass to draw the curve and then cut it out on the
bandsaw (this bandsaw has since been replaced by a Grizzly G0555P, 14”). Because the curve was large compared to the width of the separator and close to the edge, drawing the curve required placing a piece of scrap OSB at the appropriate distance from the edge of the separator for the center of the arc. I could have free-handed the curve but, I chose to use a compass.
Once the curve was cut, I smoothed it out with a sanding drum on my 10” bench-top drill press (I have since added a used Grizzly G7947, 17” floor drill press and will be selling the BTDP). I used this process to make the curve on the first bin separator and then used it as a template to mark the curve on the remaining separators.
The next step was to cut the shelf supports to length. You can use 1X3 or 1X4 material. I had some 1X4 and 2X4 on hand so I used the 2X4s on one side and the 1X4s the other side. I then cut one of the long edges at 85 degrees on the table saw so that the shelves would sit flat on the supports. I think the cart could be assembled without going to this detail, especially using 1X material, but, it was easy to do and it make for a better fit so I did.
Because of the size of the A-frame side panels, I used a circular saw to cut the 85 degree edge along the bottom of the panels. I clamped a fence in place to guide the saw.
OSB has a tendency to flake; especially at the edges so the final step in preparing the A-frame parts was to smooth all potentially exposed edges with a palm router and 1/8” round-over bit then a quick once-over with sandpaper.
See Also: Lumber Cart
Lumber Cart Build – Part 1 – Building the Base
Lumber Cart Build – Part 3 – Assembling the Cart
Lumber Cart Build – Part 4 – Accessorizing
Have a great day,