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If the final window size from outside of jamb to outside of jamb is 830 mm (32Γö¼Γò¢"), what is the length of the header required for this window?
954 mm
906 mm
931 mm
956 mm
The correct answer is: 906 mm
A and D are incorrect because they are larger than the final window size of 830 mm, meaning they would not fit within the jamb. C is incorrect because it is only slightly larger than the correct answer of 906 mm, but that small difference could still cause the header to be too long for the window. Option B of 906 mm is the most appropriate choice as it is closest to the final window size and is likely the correct length for the header.