**Calculate Ultimate Bearing Capacity**Calculate the ultimate bearing capacity of the following square footing using the **Weighted Average Method** and **Terzaghi** bearing capacity equation.### Diagram Details- **Foundation Details:** - Footing width: 5 ft - Depth from ground level to base of footing: 4.5 ft- **Soil Layers:** - **Upper Layer (2 ft):** - Dry unit weight (γᵈ): 118 pcf - **Middle Layer - Clayey Sand (6 ft):** - Saturated unit weight (γₛₐₜ): 120 pcf - Cohesion (c’): 150 psf - Angle of internal friction (ϕ’): 28 degrees - **Lower Layer - Sand:** - Saturated unit weight (γₛₐₜ): 123 pcf - Cohesion (c’): 0 psf - Angle of internal friction (ϕ’): 35 degreesThis information is used to calculate the soil's bearing capacity, which is essential for determining the safety and stability of the structure built on this foundation.

To use the weighted average method, we first need to calculate the bearing capacity of each layer of…

3-Calculate ultimate bearing capacity of the following square footing using Weigthed Average Method and Terzaghi bearing capacity equation. 4.5 ft 5 ft Yd=118 pcf Clayey Sand Ysat=120 pcf c'=150 psf o'=28 deg. Sand Ysat=123 pcf c'=0 o'=35 deg. 2 ft 6 ft

3-Calculate ultimate bearing capacity of the following square footing using Weigthed Average Method and Terzaghi bearing capacity equation. 4.5 ft 5 ft Yd=118 pcf Clayey Sand Ysat=120 pcf c'=150 psf o'=28 deg. Sand Ysat=123 pcf c'=0 o'=35 deg. 2 ft 6 ft

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

Load and resistance factor design

Load and resistance factors design (LRFD), also known as Limit state design (LSD), refers to the design method used in building engineering. A boundary condition is a condition of a structure where it can no longer meet the relevant design requirements. The condition may refer to the load level or other actions on the structure, while the terms refer to the integrity of the structure, suitability for use, durability, or other design requirements. A structure designed for LRFD is limited to keeping track of all possible actions during its design time and is always ready for use, with the appropriate level of reliability in each boundary condition. LRFD-based construction codes clearly define the appropriate levels of reliability in their instructions.

Question

**Calculate Ultimate Bearing Capacity**

Calculate the ultimate bearing capacity of the following square footing using the **Weighted Average Method** and **Terzaghi** bearing capacity equation.

### Diagram Details

- **Foundation Details:**
- Footing width: 5 ft
- Depth from ground level to base of footing: 4.5 ft

- **Soil Layers:**
- **Upper Layer (2 ft):**
- Dry unit weight (γᵈ): 118 pcf

- **Middle Layer - Clayey Sand (6 ft):**
- Saturated unit weight (γₛₐₜ): 120 pcf
- Cohesion (c’): 150 psf
- Angle of internal friction (ϕ’): 28 degrees

- **Lower Layer - Sand:**
- Saturated unit weight (γₛₐₜ): 123 pcf
- Cohesion (c’): 0 psf
- Angle of internal friction (ϕ’): 35 degrees

This information is used to calculate the soil's bearing capacity, which is essential for determining the safety and stability of the structure built on this foundation.

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Step 2: Layer 1 (Clayey sand):

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Step 4: Weighted average method:

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How did you determine the Nc, Nq, and Nr value for each type of soil?

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