Paul from SWISCO responded:
July 2, 2012
Thanks for posting. Before we address the stamps, I'll have to figure out what bottom shoe your balance has. Please look at the measurements for our 15-001, 15-002 and 15-003 bottom shoes and note their depths. As you can see, they are 1-1/8" deep and 1" deep, respectively, while the 15-003 is 1-3/16" deep and has an entirely different shape in and of itself. Which measurement more closely resembles your own shoe? Once you tell us, we will be able to determine what Series your balance is.
Next, I will need to know the weight of the sash which is being supported by the shorter balances. This will help me figure out the appropriate option to select. |
Paul from SWISCO responded:
July 2, 2012
Thanks for getting back to us, Brian. While the stamps are directly related to the window sash weight, the number itself is no indication of what the weight actually is. Since you have two different balance with two different stamps in the same window, it's best if you remove it and place it on a scale for the exact weight.
Can you also confirm the length of the metal channel for the shorter balance? If it's 20" long, it shouldn't have a stamp that begins with 18. Please confirm the length and let me know what the sash weight is and we can work from there! |
Paul from SWISCO responded:
July 5, 2012
Thanks for the information. For the first window, I would go with the 20" balances, because the stamp for the 19" balances doesn't correspond to your window weight. With that in mind, I'd go with our S390-20 channel balance with a 1950 stamp option.
For your second window, I'd suggest the S390-29, but once again the weight of the window doesn't correspond with your stamp. Can you confirm that that window weights only 13 pounds? That's very light for such a long balance. |
Paul from SWISCO responded:
July 6, 2012
Thank you. That's very odd. I'm not sure why such a light window had the 2840 stamp. That stamp supports window sash weights of 19 through, and including, 26 pounds. Have you ever had trouble lifting the window? Are you sure you aren't getting the two windows mixed up?
If you're positive that the window for the longer balance is 13 to 14 pounds, then I recommend that you choose 2820, which can carry a sash window weight of 12 through, and including, 16 pounds. The 1950 stamp option, to answer your question, can carry a window sash weight range of 18 through, and including, 21 pounds. Please keep in mind that the weight range 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. |