Handwritten only ### Problem P12.4#### Part (a)- **Task**: Draw the influence lines for reactions \( M_A \), \( R_A \), and \( R_C \) of the beam in Figure P12.4.#### Part (b)- **Task**: Assuming that the span can be loaded with a 1.2 kips/ft uniform load of variable length, determine the maximum positive and negative values of the reactions.#### Diagram Description:- **Figure P12.4**: A structural beam is illustrated. - The beam begins at point \( A \) and ends at point \( D \). - Point \( A \) has two reaction components: a moment \( M_A \) and a vertical reaction \( R_A \). - Point \( B \) contains a hinge. - At point \( C \), there is a vertical reaction \( R_C \). - The beam extends to point \( D \) with no additional reactions shown. - The span from \( A \) to \( B \) is 8 feet, from \( B \) to \( C \) is 6 feet, and from \( C \) to \( D \) is 3 feet.

P12.4. (a) Draw the influence lines for reactions MA, RA, and Rc of the beam in Figure P12.4. (b) Assuming that the span can be loaded with a 1.2 kips/ft uniform load of variable length, determine the maximum positive and negative values of the reactions. G MA |A RA k 8'— B hinge + P12,4 6'- C Rc 3² D

P12.4. (a) Draw the influence lines for reactions MA, RA, and Rc of the beam in Figure P12.4. (b) Assuming that the span can be loaded with a 1.2 kips/ft uniform load of variable length, determine the maximum positive and negative values of the reactions. G MA |A RA k 8'— B hinge + P12,4 6'- C Rc 3² D

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

Beams

In structural engineering, a beam is a component made of a variety of materials (including steel alloys, and wood) that can resist loads applied laterally to the beam axis. Members, elements, rafters, shafts, and purlins are all terms used to describe beams.

Question

Handwritten only

### Problem P12.4

#### Part (a)
- **Task**: Draw the influence lines for reactions \( M_A \), \( R_A \), and \( R_C \) of the beam in Figure P12.4.

#### Part (b)
- **Task**: Assuming that the span can be loaded with a 1.2 kips/ft uniform load of variable length, determine the maximum positive and negative values of the reactions.

#### Diagram Description:
- **Figure P12.4**: A structural beam is illustrated.
- The beam begins at point \( A \) and ends at point \( D \).
- Point \( A \) has two reaction components: a moment \( M_A \) and a vertical reaction \( R_A \).
- Point \( B \) contains a hinge.
- At point \( C \), there is a vertical reaction \( R_C \).
- The beam extends to point \( D \) with no additional reactions shown.
- The span from \( A \) to \( B \) is 8 feet, from \( B \) to \( C \) is 6 feet, and from \( C \) to \( D \) is 3 feet.

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