Unfortunately, infringement is a common occurrence in the graphic arts. Here are some examples: 1  A licensee re-uses the work beyond the scope of the license, as in the example above where the magazine adapts the illustration for a column logo.  An illustrator makes a painting from a photograph.
Most trucks can carry up to 11 1/2 cubic yards. In the winter, concrete trucks may only be allowed to carry seven or maybe as little as four cubic yards per trip.    A truck that carries that six-cubic yards of concrete in one load can weigh as much as 20 or 30 tons.
As far as I'm aware,8x8x16 blocks of cement or concrete, weigh at least 42 lbs. 6s and 4s are less of course. I know someone who broke a truck axle with these from miscalculation like that. Actually block are made by mixing sand and stone with cement and water and are a dry cast product.