Tom from SWISCO responded:
June 2, 2016
Hey, Vincent. Stamps that end in "9" or "90" use an old rating system that has fallen out of uses. Our standard options may still work for you, but you would need to weigh your sash to confirm. We have a chart on the S380-29 store page that lists how much weight each option can support.
|
Paul from SWISCO responded:
June 3, 2016
Yes, the sash is the glass panel that slides up and down. It's what the balances support.
|