Masonry, which consists of rough stones that are constructed irregularly.
Rug
Carpet made or cut and bound into room dimensions and loose laid.
Rugose
Rough and wrinkled.
Rule
(1) A regulation. (2) A straight measuring device with distance markings. Also called a ruler.
Ruler
A straight measuring device with distance markings.
Run
Horizontal distance covered by a rafter or staircase. Width of a step. Also refers to the horizontal distance of a roof from the top plate of the wall to the midpoint.
Run of the overhang
The horizontal distance that a rafter overhangs the wall.
Run time
Run time refers to the effective time of battery powered tool operation before recharging is required. Conditions under which the tool is used greatly affect this time. For instance, a battery used in drilling holes in softwood will operate longer on a single charge than when drilling holes in steel.
Run with the land
Expression that indicates a right or a restriction that will affect all current and future owners.
Run-of-river hydropower
A type of hydroelectric facility that uses the river flow with very little alteration and little or no impoundment of the water.
