A 16 in square concrete column carries vertical unfactored load of 250 k. The vertical serviceload is 210 k. It is to be supported on a square footing with f′ c = 3,000 lb/in2 and fy = 60 k/in2. The soil has an allowable bearing pressure of 6,500 lb/ft2 for bearing capacity (based on ASD methods) and 4,100 lb/ft2 for settlement. The groundwater table is at a great depth. Because offrost heave considerations, the bottom of this footing must be at least 30 in below the groundsurface. Determine the required footing width, thickness, size of the flexural reinforcement, andshow your design in a sketch.
A 16 in square concrete column carries vertical unfactored load of 250 k. The vertical serviceload is 210 k. It is to be supported on a square footing with f′ c = 3,000 lb/in2 and fy = 60 k/in2. The soil has an allowable bearing pressure of 6,500 lb/ft2 for bearing capacity (based on ASD methods) and 4,100 lb/ft2 for settlement. The groundwater table is at a great depth. Because offrost heave considerations, the bottom of this footing must be at least 30 in below the groundsurface. Determine the required footing width, thickness, size of the flexural reinforcement, andshow your design in a sketch.
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
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Question
A 16 in square concrete column carries vertical unfactored load of 250 k. The vertical service
load is 210 k. It is to be supported on a square footing with f′
c = 3,000 lb/in2
and fy = 60 k/in2
.
The soil has an allowable bearing pressure of 6,500 lb/ft2
for bearing capacity (based on ASD
methods) and 4,100 lb/ft2
for settlement. The groundwater table is at a great depth. Because of
frost heave considerations, the bottom of this footing must be at least 30 in below the ground
surface. Determine the required footing width, thickness, size of the flexural reinforcement, and
show your design in a sketch.
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