Which stamp option should I choose?
A home owner from Phila PA says:
July 7, 2010
I have a 28 inch series 390 balance, I cannot see a stamp number on the channel, which should I choose?
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Donna from SWISCO responded:
July 7, 2010
Remove the window sash and place it on a scale.
These stamp options will carry a window sash weight range of the following given weights 2710: 5 through 9 pounds 2720: 9 through 13 pounds 2730: 13 through 19 pounds 2740: 19 through 26 pounds 2760: 30 through 33 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. |