Statics: pratt truss calculation check

[mrmotobiker]

Homework Statement

please find it attached as pdf.

Homework Equations

joint method was conducted.

The Attempt at a Solution

please find it attached. i spent so much time on this and i took statics like 1.5 years ago. can you help me find my mistake? i can't seem to find why is my center joints not canceling out.

oh does anyone know how to use RISA? this is for a project in my experimentation class.

 

[mrmotobiker]

oh i know i know, I'm a civil and i know statics is a foundation for civil engineering =P but man... I am so pissed off because of this! i redid it like 5 times. i really need to finish this by tomorrow because I'm actually testing a the real thing on the truss machine. will post pics of the testing if i manage to finish this.

 

[PhanthomJay]

Don't know about RISA, but you made a math error at joint B in calculating BG..otherwise, you're doing good...