Beta is a measure of an investment's relative volatility. The higher the beta, the more sharply the value of the investment can be expected to fluctuate in relation to a market index. For example, Standard & Poor's 500 Index (S&P 500) has a beta coefficient (or base) of 1.
In the USA, NFPA 1 requires portable fire extinguishers to be mounted with their top no more than 5 feet from the floor, if under 40 pounds, no more than 3 1/2 feet (42 inches) if they are over 40 pounds. In both cases, the bottom of the fire extinguisher must be at least 4 inches from the floor, except for larger extinguishers mounted on wheels. NFPA 1: 13.6.8.1.3.8 (2009), with reference to NFPA 10: 6.1.3.8.
It is also important to choose a fire extinguisher that is large enough for the job. For example, an ABC multipurpose dry chemical (Sodium bicarbonate) fire extinguisher can be bought in various sizes. A 1 to 2 lb extinguisher has a 5-8 foot horizontal stream range and will discharge for 8-12 seconds.A 2 to 5 lb extinguisher has a 5-20 foot horizontal stream range and will discharge for 8-20 seconds.In general, a 5 lb or larger dry chemical extinguisher is recommended for general use in an office building, small shop or vehicle.Talk with your local fire inspector for their recommendations regarding the size extinguisher you should provide for the hazards in your area.n general, a 5 lb or larger dry chemical extinguisher is recommended for general use in an office building, small shop or vehicle. Talk with your local fire inspector for their recommendations regarding the size extinguisher you should provide for the hazards in your area.