Measure and Cut the Platform Top
In making the platform, first measure and cut the top (Image 1). Once you know how wide you need the top to be, transfer that measurement to the plywood with a pencil and mark the cut lines. Use a framer's square to make the corner angles accurate; this will keep the whole stand square. Then, using a circular saw, cut along the marks you've made (Image 2). This piece will be the top of the platform (Image 3). For our barrel, the wooden platform measured 30"x30".