Geometric shapes are made from straight or curved lines such as circles, squares and triangles. Their easy-to-recognize and often symmetrical patterns offer a sense of order, efficiency, strength, formality, but to some may be seen as uninteresting. Squares and rectangles are the predominant geometric shapes seen around us, not only in furniture, but in all areas of life. A circle has no beginning or ending, making it complete and inspiring thoughts of nature, perfection, unity, initiation and inclusion.
My advice? Don't do this. If you have jointer and a planer, use them. If you don't, seriously consider using dimensional lumber that has already been planed and sanded. If you are going to try to clean up construction lumber by hand, using a hand plane is a lot faster and more pleasant than using a belt sander. Except, of course, that to do a good job of planing a board you need a solid bench to hold the board, and you don't have a bench, yet.
While a strict figure for the bench’s weight capacity is not available, a quick browse through their other stand and bench products shows a general weight capacity well above most other brands. As such, while we cannot say for certain that this bench provides the best weight capacity, it is more than likely that it the capacity is similar to the other products in the catalog.