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Bracing a W section

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Greetings
 
I am analysing an existing scoreboard for future expansion. It has a horizontal truss with W14x30's being braced by 2 1/2 x 2 1/2 x 1/4 angles (at the top and bottom flange).
 
Would be adequate to use a section having twice the section properties as the 2 1/2 x 2 1/2 x 1/4 or are there any other ways to model the same.
 
I am using ETABS for my analyses.
 
Thanks
Anantha


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ANANTHA NARAYAN, E.I.
Structural Engineer
Bliss and Nyitray Inc.
Miami, FL - 33134


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