window weight- spiral ballance color code

A quick learner from California says:
June 11, 2010
where is your table for window weight and spiral ballance color code for the S500-28? I do not know what a standard weight is but I know my window weight is 20 lbs.
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Donna from SWISCO responded:
June 14, 2010
S500-28 with the red tip option will carry a window sash weight range of 7 through 29 pounds.
This information is based on 2 balances per sash. Balances are designed assuming friction in the jamb weather-strip will carry a portion of the sash weight. Suggested sash weights are approximate.
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