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equals <br /> To�als for net wall: 321?.399333 �.043 138.35 <br /> Total� for gross wall aren: 393.99 <br /> * Framing area is 10� of gross wa21 ar�a <br /> 13. Gross wall area x factor below = U x A per code <br /> Factor is .11 for A-1 sinqlc family � duplex <br /> ,23 for A-2 and other resident�al <br /> .23 for otiher buildings <br /> ,2$ for over 3 stories <br /> Factor i�: 0,11 <br /> BTUH = 516.6509 MUST HE > OR = 393.Q9 <br /> (calculated above) <br /> 14. Gross ceiling area = 1866 <br /> 15. Ce�.ling freming area (104r of ceiling area} = 188.6 <br /> 16. Joist Ar�a (108 of eQiling area) = 188.6 <br /> 17. Net ceiling area tGross aeil. area - Joist area) = 1697.4 <br /> 1$. U ceiling: 0.021 x Net cei1. area = 35.6954 <br /> 19. U framing: 0.024 x Jaist area � 4.5264 <br /> 20. Total of item 18 x item 19 = 40.1718 <br /> 21. Gross ceil.ing area x faCtor below = U x A per code <br /> Factor is .026 for A-1 single family & duplex <br /> .033 for A-2 and other resident�.al <br /> ,06 for other buildin�s <br /> Factor is: 0.026 <br /> BTUH = 99.036 MUST BE > OR = 40.1718 <br /> (calculated above) <br />