Hardie plank siding is a premium brand of cement board siding (also known as fiber cement board siding) produced by the James Hardie Company.ardie plank can be purchased with a wood-grain look, a plain smooth look or a stucco type finish. Hardie plank also comes in simulated cedar shingle planks.
activity duration. Period (hours, days, weeks) required to complete an activity. Activities with zero duration are called milestones.
duration of action. Therapeutics The length of time that a particular drug is effective. duÂ·raÂ·tion of acÂ·tion. (dÅ­r-Ä'shÅ­n ak'shÅ­n) The amount of time that a measurable drug effect persists.