Solving for Ra & Rb on a Beam: Step-by-Step Guide

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SUMMARY

This discussion focuses on solving for the reaction forces Ra and Rb on a beam subjected to a uniform load of 4 kips/ft and a concentrated load of 50 kips. The beam spans 20 feet with a triangular support at the left end (Ra) and a circular support at the right end (Rb). Participants provide step-by-step guidance on applying static equilibrium equations to determine the values of Ra and Rb, emphasizing the importance of accurately representing the beam's loading conditions.

PREREQUISITES
  • Understanding of static equilibrium principles in mechanics.
  • Familiarity with beam loading conditions and support types.
  • Knowledge of how to apply the equations of equilibrium (ΣF = 0, ΣM = 0).
  • Basic skills in drawing free body diagrams for structural analysis.
NEXT STEPS
  • Study the principles of static equilibrium in structural analysis.
  • Learn how to create and interpret free body diagrams for beams.
  • Research methods for calculating reaction forces in beams with varying loads.
  • Explore examples of beam analysis using software tools like SAP2000 or AutoCAD.
USEFUL FOR

Engineering students, structural engineers, and anyone involved in analyzing beam structures and reaction forces in mechanical systems.

kyle_soule
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I need help with this problem:

You have a beam and this is the information I have and I need to find the reaction [ascii art is hard]

50 kip
|
V
----------------------------
| | | | | | | | | |
V V V V V V V V V V
---------------------------- <---- 4 kips/ft
^ (-)
/_\ (_) <---that is a circle
|----10 ft---|
|------------20-------------|

^Ra ^Rb

I need to solve for Ra and Rb, it would be very much appreciated if someone could walk me through the steps also.

Thanks!

EDIT: the art doesn't work so I will tell you, there is a triangle at the left [Ra] end and a circle at the right [Rb] side.
 
Last edited:
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Originally posted by kyle_soule
EDIT: the art doesn't work so I will tell you, there is a triangle at the left [Ra] end and a circle at the right [Rb] side.

Sorry, but I am still not sure of what you are trying to draw. Try it using the "code" brackets:

[ code ]

[ /code ]

(without the spaces)

What that does is it preserves spaces that you put in the text, like so:

Code:
I'm writing on the left.
                      Oooh, now I'm writing on the right!
 
Code:
        50 kip
           |
           V
----------------------------
|  |  |  |  |  |  |  |  |  |
V  V  V  V  V  V  V  V  V  V  
----------------------------  <---- 4 kips/ft
 ^                       (-)    
/_\                      (_)  <---that is a circle
|----10 ft---|
|------------20-------------|

^Ra                        ^Rb
 

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