Who should attend. The course is designed for those who may have to conduct or participate in an aircraft accident investigation. This may be in the role of official investigator for a State or as an accredited representative/technical advisor of a manufacturer, operator or service provider.
Before electronic calculators, converting square varas (at 1 vara = 32.8748 inches) to acres was a tedious job. But if 1 vara = 33 1/3 inches, 3 varas are exactly 100 inches, 36 varas are exactly 100 feet, and 108 varas are exactly 100 yards. An easy division and some shuffling of the decimal point do the job.
The total rise is a stairwayâs overall change in height, from the landing pad to the top of the deckâs decking. Now, some common code requirements, along with our recommendations: - The stairâs treads should be at least 36 inches wide. We think stairs should be at least 48 inches wide, so they donât feel cramped. - The maximum allowable unit rise is 7 3/4 inches, and the minimum unit rise is 4 inches. For recommendations on rise-run combos, see the tip. - The difference between a stairâs longest and shortest riser height or stair depth should be no more than 3/8 inch. This is pretty strict, so take the time to plan your stringers carefully. - An open stringer should have notches that are not too deep, or the stringer will be weak.