The stamp options indicate the balance strength. If you cannot locate the stamp on the original window balance remove the window sash and place it on a scale.
S795-28 with stamp option:
28a will carry a window sash weight range of 7 through 12 pounds.
28b will carry a window sash weight range of 12 through 18 pounds.
28c will carry a window sash weight range of 18 through 23 pounds.
28d will carry a window sash 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.
Balance Options

Casey from SWISCO
Dec 28, 2009 10:41 am


2 Replies

Quick Learner from Missouri
Dec 28, 2009 12:19 pm
What do the options 28d 28c 28b 28a mean for a S795-28 balance?
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