The owner of an existing single-story industrial structure is considering adding a second storyto the structure. The structure consists of a steel frame with concrete footings founded on 3 mof well compacted silty sand fill. The existing columns are capable of carrying the additionalload but there is concern about the additional settlement that may occur. A typical circularfooting for the structure is 80 cm in diameter, and will carry an additional service load of60 kN if the proposed addition is constructed. Standard penetration tests conducted near theexisting footings indicate an average N60 value of 30. Estimate the additional settlement thatwill be generated by the proposed second-story addition.
The owner of an existing single-story industrial structure is considering adding a second storyto the structure. The structure consists of a steel frame with concrete footings founded on 3 mof well compacted silty sand fill. The existing columns are capable of carrying the additionalload but there is concern about the additional settlement that may occur. A typical circularfooting for the structure is 80 cm in diameter, and will carry an additional service load of60 kN if the proposed addition is constructed. Standard penetration tests conducted near theexisting footings indicate an average N60 value of 30. Estimate the additional settlement thatwill be generated by the proposed second-story addition.
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
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The owner of an existing single-story industrial structure is considering adding a second story
to the structure. The structure consists of a steel frame with concrete footings founded on 3 m
of well compacted silty sand fill. The existing columns are capable of carrying the additional
load but there is concern about the additional settlement that may occur. A typical circular
footing for the structure is 80 cm in diameter, and will carry an additional service load of
60 kN if the proposed addition is constructed. Standard penetration tests conducted near the
existing footings indicate an average N60 value of 30. Estimate the additional settlement that
will be generated by the proposed second-story addition.
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