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■ <br />� <br />M. ADVANCED FRAMiN� <br />Thc theraal resistaacn of troad is roughly Y-1 per inch. The iaiulated �hell <br />of a 6oase bailt win6 currcn[ pxactices �ay be ao much as 20Z vood. <br />Decreaaing the amount of rood in wa11s vill increase the overall ther�al � <br />reaistance of the �uilding envelope. The pereentage of fraaiag ia the <br />nzterior bnildiag ehell can be reduced to approziaately 12Z vitLout affectiag <br />the stractural integrity of the building. 1Lis concept is ]mc�vn aa advanced <br />fra�iag. The figure belov graphs the relationship betveen the percentage.of <br />fraaiag in valls vith their overall Y-valae. <br />� ` FIQURE 4-59 <br />,�., <br />7�� Im ct of Wood <br />� �; � <br />�� Insulafion Value <br />� <br />� <br />Framing on <br />of V1/alls �` <br />� �0 4o So <br />,- �N9UV+fio N <br />R-vM,tS oF n16uV.TwrJ� <br />* c�to. .��v <br />Fa�M 5ovre iwe, <br />PEor��RY lys4. <br />The coneept of advanced fraing has been proposed for more than a deeade ae a <br />co�t srving aeasure. 'It aot only reducei �aterial cost but alro reducns labor <br />co�t. ii6ile ezact co�t savinge srill vary from builae_ to builder, several <br />;, organizations have publiahed eetimates ranging from 7z to 17x. See the <br />. refermces in Appendiz A.3 for further ruding on coet savings. <br />....Y.w.....�..� <br />4-150 <br />