A spiral column carries a dead load of 1070 kN and a live load of 980 kN. If fc' = 27.50 MPa Fy = 413.50 MPa. Use U = 1.2D + 1.6L, Ф = 0.65, ρ = 0.01 1. Which of the following gives the value of the diameter of spiral column. a. 440 mm b. 420 mm c. 450 mm d. 510 mm

A spiral column carries a dead load of 1070 kN and a live load of 980 kN. If fc' = 27.50 MPa Fy = 413.50 MPa. Use U = 1.2D + 1.6L, Ф = 0.65, ρ = 0.01 1. Which of the following gives the value of the diameter of spiral column. a. 440 mm b. 420 mm c. 450 mm d. 510 mm

Principles of Foundation Engineering (MindTap Course List)

8th Edition

ISBN:9781305081550

Author:Braja M. Das

Publisher:Braja M. Das

Chapter6: Vertical Stress Increase In Soil

Section: Chapter Questions

Problem 6.4P: Refer to Figure P6.4. A strip load of q = 900 lb/ft2 is applied over a width B = 36 ft. Determine...

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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

A spiral column carries a dead load of 1070 kN and a live load of 980 kN. If fc' = 27.50 MPa Fy = 413.50 MPa. Use U = 1.2D + 1.6L, Ф = 0.65, ρ = 0.01

1. Which of the following gives the value of the diameter of spiral column.

a. 440 mm

b. 420 mm

c. 450 mm

d. 510 mm

2. Which bar size will provide least number of pieces allowed?.

a. 16 mm

b. 22 mm

c. 20 mm

d. 25 mm

3. Which of the following gives the possible spacing of the 10 mm0 spirals.

a. 30 mm

b. 40 mm

c. 60 mm

d. 60 mm

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