I did some measurements, it looks like I need a 19-0002 top, and a 15-0001 shoe.
And the metal channel is 30" without the top nor the shoe.
I took the window off and weighted it, it is ~24 lb only. Don't know what the #38 in the marking means.
Does the channel balance come assembled with the top and shoe, or I have to buy the rivet to do it myself?
Thx.
Thanks Tom, what if I still assume the #38 means 38 lbs rating. What option should that be?
And what is the consequences if I choose to use a pair of channel balances with higher rating?
Tim
If the weight of your sash is approximately 24 pounds, then I wouldn't worry about that #38. It is likely just a manufacturing mark at the end of the stamp.
If a balance has too high a rating, then then window would be very hard to open. Like I said, though, the 2940 stamp is perfect for a window sash of 24 pounds.