A 30' B 4@ 5' = 20'- FIGURE P5.11-7 5.11-8 Use LRFD and design a typical girder for the floor system of Problem 5.11-7. Do not check deflections. Assume that the girder is supporting beams on each side, and assume that the beams weigh 35 lb/ft. Consider the beam reactions to act as point loads on the girder. a. Use LRFD. b. Use ASD. 5.11-9 Same as Problem 5.11-8, but let all the loads on the girder act as a uniform load (be sure to include the weight of the beams).

Structural Analysis
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ISBN:9781337630931
Author:KASSIMALI, Aslam.
Publisher:KASSIMALI, Aslam.
Chapter2: Loads On Structures
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Answer problem 5.11-9: Same as problem 5.11-8, but let all the loads on the girder act as a uniform load (be sure to include the weight of the beam).

**Transcription and Explanation for Educational Purposes:**

---

### Diagram: Figure P5.11-7

- **Description:** The diagram is a schematic of a floor system showing five vertical lines labeled as "A" and "B," which represent beams. There are four spaces between these beams, each measuring 5 feet, totaling 20 feet. The vertical length of the figure is 30 feet.

---

### Problem Description

**5.11-8**

- **Objective:** Design a typical girder for the floor system shown in Figure P5.11-7.
- **Method:**
  - Use Load and Resistance Factor Design (LRFD).
- **Instructions:**
  - Do not check deflections.
  - Assume the girder supports beams on each side.
  - Each beam weighs 35 pounds per foot.
  - Consider beam reactions as point loads on the girder.

**Tasks:**

- **a.** Use LRFD.
- **b.** Use Allowable Strength Design (ASD).

**5.11-9**

- **Objective:** Similar to Problem 5.11-8, but change the loading condition.
- **Instructions:**
  - Consider all loads on the girder as a uniform load.
  - Include the weight of the beams when calculating the load.

---

This content would be suitable for teaching structural engineering students about designing girders using different design methods, particularly focusing on LRFD and ASD.
Transcribed Image Text:**Transcription and Explanation for Educational Purposes:** --- ### Diagram: Figure P5.11-7 - **Description:** The diagram is a schematic of a floor system showing five vertical lines labeled as "A" and "B," which represent beams. There are four spaces between these beams, each measuring 5 feet, totaling 20 feet. The vertical length of the figure is 30 feet. --- ### Problem Description **5.11-8** - **Objective:** Design a typical girder for the floor system shown in Figure P5.11-7. - **Method:** - Use Load and Resistance Factor Design (LRFD). - **Instructions:** - Do not check deflections. - Assume the girder supports beams on each side. - Each beam weighs 35 pounds per foot. - Consider beam reactions as point loads on the girder. **Tasks:** - **a.** Use LRFD. - **b.** Use Allowable Strength Design (ASD). **5.11-9** - **Objective:** Similar to Problem 5.11-8, but change the loading condition. - **Instructions:** - Consider all loads on the girder as a uniform load. - Include the weight of the beams when calculating the load. --- This content would be suitable for teaching structural engineering students about designing girders using different design methods, particularly focusing on LRFD and ASD.
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