What is the weight strength needed?

Home Owner from Oakley Ca
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My stamp says 26-9 kx cmc 7. I understand that it is 27 in long, but how do I determine the weight strength needed?
2 Replies
Bob
Bob from SWISCO
SWISCO
Expert

The 26-9 stamp code is from an older rating system we do not use. To know what stamp option to select for your balance, you'll have to obtain the exact weight of the window sash. You can then match that exact weight with one of the weight ranges listed alongside each stamp option in a given balance's product description. 

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