Registration

[pbeng]

I've a colleague who's trying to register. There's a test question with 3 answers that he can't get past. He's tried all 3 (I guessed concrete shell), but keeps getting an invalid answer response. Please advise. Thanks...

Confirmation of Registration
Identify element types
that might appear in a
structural model from the
list: tower bee beam
failure shear steel
concrete shell

[fmk]

beam shell

[pbeng]

Thanks...

[ajbwr]

thanks