Name the Chicago architect and engineer credited with designing the fi rst steel-frame structure.
What will be an ideal response?
Architect William LeBaron Jenny and civil engineer George Whitney
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The most commonly used gauge is the ____.
A. American Wire Gauge B. Brown and Sharpe Wire Gauge C. Birmingham Wire Gauge D. Manufacturer's Standard Gauge for Sheet Steel
A red, slippery jelly formed on the inside of a toilet tank is caused by _____.
a. calcium salts b. manganese-eating bacteria c. sulfates d. iron-eating bacteria
All of the English plantation colonies in the South
A. permitted some religious toleration. B. generally relied on the commercial export of profitable staple crops such as rice and tobacco. C. permitted slavery after 1750. D. lacked the development of large cities. E. all of the choices
A tee fitting is used to make _____-degree turns in piping
A) 30 B) 45 C) 60 D) 90