Author Archives: Conrad
Zero-Force Members
Zero force members are members in a truss/frame that theoretically have no force in them. Being able to identify these members swiftly will aid you on the PE Exam and in life in general (possibly).
There are two rules to look for when identifying zero-force members.
- Joints with three members where two of the members are parallel, and there is no external load. The third member will be zero-force.
- Joins with two members and no external load. Both members are zero force.
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Method of Joints
When analyzing a joint you will solve for the forces in all of the members connected to it.
Lets start with H, draw the two unknown forces \(F_{HE}\) and \(F_{HF}\) in tension (away from H). Click here to continue reading
Method of Sections
Here is a good memory refresher from Structural Analysis, the Method of Sections. Many types of problems will require this as an intermediate step so it is a good idea to become familiar with it.
In the Frame below, Find FBE
Member BE is in the middle of the frame here, the easiest way to find the force inside the member is to cut a section through it. Click here to continue reading
What to Consider When Purchasing Material for the Exam
Today I purchased my initial batch of study materials for the PE exam. I was hesitant of what to buy because I am unsure of which afternoon depth option to take and the study material is so expensive (I am cheap like most engineers).
The obvious book to get, which basically everyone gets, is the Civil Engineering Reference Manual for the PE Exam
