Concrete block weighing 20,000 lb is supported by 2 STEEL rods

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williamx11373 said:
a concrete block weighing 20,000 lb is supported by 2 STEEL rods, rod AB has an area of 1 in and rod CD has an area of 2 in...

what is the elongation of each rod...?



http://s44.photobucket.com/albums/f46/maximus11373/?action=view&current=untitled.jpg&newest=1


i don't know how to start, should i take reactions of the concrete block??

any help will be appreciated.
Finding reactions of the steel rods on the concrete block would be a good start. Can you find them? Then what?