Install railings on any deck that is 30 inches or more from the surrounding surface and on at least one side of a stairway leading to the deck. The top of the handrail should be at least 34 inches but not more than 38 inches high.
The SI base units. The International System of Units (French: SystÃ¨me international d'unitÃ©s pronounced: [sistÉm ÉÌtÉÊnasjÉnal dynite]; abbreviated as SI) is the modern form of the metric system, and is the most widely used system of measurement. It comprises a coherent system of units of measurement built on seven base units.
Most sciences employ the metric system of measurement. In fact, most of the world in general uses the metric system. Technically, the standard set of units most often used is called SI units, although many of them are similar to the metric system. See the Related Questions link for all the SI units.