Draw the influence lines for bar forces in members HD and HC of the truss shown in Figure P12.33. The load moves along the bottom chord of the truss. If the truss is to be designed for a uniform live load of 0.32 kip/ft that can be placed anywhere on the span in addition to a concentrated live load of 13 kips that can be positioned where it will produce the largest force, compute the maximum tension and compression forces in bar HD.
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Express 7/18 as a decimal fraction. Round to the nearest hundredth.
Reduce all fractions to their simplest forms. Convert all improper fractions to mixed numbers. Provide answers in the following format: Fraction: 3/4 Mixed number: 1 5/8
Express the following as an equation: "A number plus three times the number equals 44."
Fill in the blank(s) with the appropriate word(s).
Usually the object being viewed is located in front of the picture plane
Indicate whether the statement is true or false
Which of the following statements is true?
a. If an HVAC contractor detects an IAQ problem during routine maintenance, the contractor should immediately inform the customer about the problem in writing. b. HVAC contractors have no liability for system repairs that do not meet local code requirements if the code was changed before the repairs were completed. c. Occupants of a building who claim to suffer from sick building syndrome may sue the owner of the building, but not the HVAC contractor, for damages. d. The International Building Code requires that HVAC contractors assume unlimited liability when retrofitting existing systems.