Forces in a Truss: Solve for AB Force

[canicon25]

[PLAIN]http://img109.imageshack.us/img109/3825/truss3.jpg
I am having some problems with this one. Can I section the truss through members AB, BE and EF to solve for the force in AB, thus disregarding the fixed connections at left? I suppose I could go join by join, but I would like to section if possible.

Any help would be great.

**MODS Can you move this into the homework section. I just noticed your sticky but already created the thread ***

 

[tiny-tim]

hi canicon25!

have you tried finding the reaction force at A and E, by taking components and moments?

 

[canicon25]

i used method of joints and went one by one with this one after all. i think the provided solution is an error; i worked out 36kN twice. typo i think.

 

[PhanthomJay]

Yes, typo.

 

[PJC01]

I understand the importance of properly solving for forces in a truss structure. In order to accurately determine the force in member AB, it is important to consider the entire truss system and not just a specific section. While sectioning the truss may seem like a logical approach, it may lead to inaccurate results as it disregards the fixed connections at the left.

I would recommend using a method such as the method of joints or method of sections to solve for the force in AB. These methods take into account the entire truss structure and ensure accurate results. Additionally, it is important to consider the external loads and reactions at the supports when solving for forces in a truss.

I understand the desire to simplify the problem by sectioning the truss, but in the interest of accuracy, it is best to use established methods for solving truss structures. I hope this helps in your analysis and understanding of forces in truss systems.