Form
20-F x
|
Form
40-F o
|
Yes o
|
No
x
|
GERDAU
S.A.
|
By:
/s/Osvaldo
Burgos
Schirmer
|
Name: Osvaldo
Burgos Schirmer
|
Title: Chief
Financial Officer
|
Exhibit
|
Description
of Exhibit
|
99.1
|
Press
release, February 27, 2008
|