A sparse ruler is called optimal if it is both minimal and maximal. Since the number of distinct pairs of marks is m ( m â 1 ) / 2 {\displaystyle m(m-1)/2} , this is an upper bound on the length L {\displaystyle L} of any maximal sparse ruler with m {\displaystyle m} marks.
1 One 23/32-inch 4x8-foot plywood piece weighs approximately 67 pounds, while a piece of OSB of the same dimensions weighs approximately 78 pounds.
Posted in Builders, Dealers, DIY, Framers on August 18, 2015. There is a vital difference between Plywood and OSB panels and sheathing that are classified as âExteriorâ and âExposure 1â. Utilizing the wrong panels or sheathing could compromise the structure which is exposed to weather.