Casey from SWISCO responded:
March 23, 2011
The 2230 stamp option is a good choice.
A 23" Series 370 with stamp option 2730 will carry a window sash weight range of 12 through 19 pounds. Provided 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. |