The Pacific Northwest (PNW), sometimes referred to as Cascadia, is a geographic region in western North America bounded by the Pacific Ocean to the west and (loosely) by the Cascade Mountain Range on the east.
Mean time between failures (MTBF) describes the expected time between two failures for a repairable system, while mean time to failure (MTTF) denotes the expected time to failure for a non-repairable system. the MTBF is the sum of the operational periods divided by the number of observed failures.
The maximum weight that can be applied to the scaffold is determined by data supplied by the manufacturer, expressed as permissible load per square feet (e.g. 25 psf, 50 psf, or 75 psf, multiplied by the square footage of the scaffold work surface.