Casey from SWISCO responded:
November 25, 2009
Please remove the window sash and place it on a scale.
The weight of the window sash in pounds is needed to determine the proper stamp option.
S380-20 Stamp Option: 1910 will carry a window sash weight range of 5 through 8 pounds. 1920 will carry a window sash weight range of 8 through 12 pounds. 1930 will carry a window sash weight range of 12 through 14 pounds. 1940 will carry a window sash weight range of 14 through 17 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. |