Problem # 3 A combined footing supports an exterior column 16 in x 16 in carrying a service dead load of 155 kips and a service live load of 165 kips, plus a 22-in.-square interior column carrying service loads of 205 kips dead load and 230 kips live load. The distance between the columns is 18 ft, center to center. For shallow foundations, the allowable soil bearing pressure is 4 ksf and the bottom of the footing is 4 ft below final grade. Design the steel in long direction using fc' = 3 ksi, fy 60 ksi.

Problem # 3 A combined footing supports an exterior column 16 in x 16 in carrying a service dead load of 155 kips and a service live load of 165 kips, plus a 22-in.-square interior column carrying service loads of 205 kips dead load and 230 kips live load. The distance between the columns is 18 ft, center to center. For shallow foundations, the allowable soil bearing pressure is 4 ksf and the bottom of the footing is 4 ft below final grade. Design the steel in long direction using fc' = 3 ksi, fy 60 ksi.

Structural Analysis

6th Edition

ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

Section: Chapter Questions

Problem 1P

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Concept explainers

Methods to Determine Vertical Stress

The load applied to the soil is transferred to the underground. The presence of water at soil pores and solid grains above the soil are the primary components that are responsible for the effective load transfer. Due to the load acting, the internal component of the soil or the underground formations undergoes deformations or a tectonic shift. The amount of deformation depends upon the amount of load acting on the soil surface, which indeed, depends on the weight of everything present above the soil. Due to this, the underground soil element develops internal stresses which try to resist the tectonic changes.

Question

Problem # 3
A combined footing supports an exterior column 16 in x 16 in carrying a service dead load of
155 kips and a service live load of 165 kips, plus a 22-in.-square interior column carrying service
loads of 205 kips dead load and 230 kips live load. The distance between the columns is 18 ft,
center to center. For shallow foundations, the allowable soil bearing pressure is 4 ksf and the
bottom of the footing is 4 ft below final grade. Design the steel in long direction using fc' 3 ksi,
fy 60 ksi.

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