You may need the 2840 option, weight the window sash to check.
The 2840 will carry a window sash load weight range of 23 through 28 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.
Channel Stamp Options

Casey from SWISCO
Apr 22, 2009 1:09 pm


4 Replies

Home Owner from Dover, FL
Apr 22, 2009 4:08 pm
My balance channel is stamped 28D USB, what option should I use.

Home Owner from Palm Coast, FL
Nov 24, 2010 8:57 pm
Hello, my ch. balance is stamped 29 9 BX CMC 10, what should I use.
Thanks.
Thanks.

Tom from SWISCO
Nov 29, 2010 8:23 am


You may need the 2950 stamp option. However, in order to determine the series of the balance, you will need to identify the shoes that are attached.
Please reply to this discussion with pictures.
Please reply to this discussion with pictures.
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