the maximum length of a double section ladder is

4. \sin{\theta} = \frac{B^{1/3}}{ \sqrt{A^{2/3} + B^{2/3} }} \\ Slip-resistant feet shall not be used as a substitute for care in placing, lashing, or holding a ladder that is used upon slippery surfaces including, but not limited to, flat metal or concrete surfaces that are constructed so they cannot be prevented from becoming slippery. It only takes a minute to sign up. When Is A PFAS Required? L^2 &=& (A + x)^2 + (B + y)^2 \\ Extend ladder side rails to at least 3 ft. above the landing unless handholds are provided. Single Ladders rated for medium duty service are available . MARR is 10 percent/year, and the finance rate is 5 percent/year. As new firefighters, we are all taught that the proper working . Employers constructing job-made ladders must follow the ladder requirements set forth in 29 C.F.R. Here are two substitutes: First, there are simpler calculations using more advanced techniques, and maybe these calculations will make the form of the answer seem less mysterious. The highest rung on which you could safely stand is 4 from the top of the ladder. Electrocution As far as I know, this isn't a case where there's an intuitive explanation of this problem on its own. Ultimate failure Wood ladders shall not be coated with any opaque covering, except for identification or warning labels which may be placed on one face only of a side rail. Portable Ladder Safety - Ladder Regulations and Design Standards \theta = \arctan{\left( \frac{B}{A} \right)^{\frac{1}{3}}} \\ With $p=2$ it's the usual distance, as in Pythagoras' theorem; with $p=1$ you get taxicab distance; for $p\ge 1$ you get various weird notions of "distance" which still act in some essential ways like the familiar notion; for $0

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