Casey from SWISCO responded:
July 27, 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.
Stamp option 3110 will carry a window sash weight range of 7 through 12 pounds. Stamp option 3120 will carry a window sash weight range of 12 through 16 pounds. Stamp option 3130 will carry a window sash weight range of 16 through 23 pounds. Stamp option 3140 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. |