SE 2-Day Exam Problem 602

[Hromis1]

For anyone working throught the NCEES new 2 day example problems. Problem 602 on the PM vertical Building portion.

On page 97 of the solution when the top and bottom flange force is being computed:

The solution "appears" to directly use the tension force of 2 kips, rather than 6kips for the "scaled" forces for a unit load of 3.04 kips per foot on the beam.

Am I missing something here? It realy does not change the answer. But the solution in the book then becomes very "Iffy"...ie the plat use ratio is pegged at 100%. It was at 97% using the way the solution is written up.

Just another example of a poor solution that I would never do in the real engineering world. But I want to make sure I am understanding the solution as NCEES has it written.

Anyone out there working these problems?

 

[McEngr]

For anyone working throught the NCEES new 2 day example problems. Problem 602 on the PM vertical Building portion.
On page 97 of the solution when the top and bottom flange force is being computed:

The solution "appears" to directly use the tension force of 2 kips, rather than 6kips for the "scaled" forces for a unit load of 3.04 kips per foot on the beam.

Am I missing something here? It realy does not change the answer. But the solution in the book then becomes very "Iffy"...ie the plat use ratio is pegged at 100%. It was at 97% using the way the solution is written up.

Just another example of a poor solution that I would never do in the real engineering world. But I want to make sure I am understanding the solution as NCEES has it written.

Anyone out there working these problems?

Hromis1, for some reason, it's taking more than 10 days to get my book. You must have jumped on getting a copy as soon as it came out. I will definitely tackle the problem with you when I get the book.

Just a little off topic here: What part of the Buckeye State are you from? I have several cousins that live in the Dayton, Springfield, Columbus area (several attending THE OSU).

 

[patik83]

For anyone working throught the NCEES new 2 day example problems. Problem 602 on the PM vertical Building portion.
On page 97 of the solution when the top and bottom flange force is being computed:

The solution "appears" to directly use the tension force of 2 kips, rather than 6kips for the "scaled" forces for a unit load of 3.04 kips per foot on the beam.

Am I missing something here? It realy does not change the answer. But the solution in the book then becomes very "Iffy"...ie the plat use ratio is pegged at 100%. It was at 97% using the way the solution is written up.

Just another example of a poor solution that I would never do in the real engineering world. But I want to make sure I am understanding the solution as NCEES has it written.

Anyone out there working these problems?

Hromis1, I agree with you. I would solve the problem by adding 6.1k/2=3 k to the tensile flange, and subtracting 3k from the compression flange. It doesn't change the solution, since the axial force is so small, but it is an error.