住宅建筑能源法规要求建筑组件达到或超过特定的R值。要计算R值，需要了解外墙、天花板和楼板中框架的百分比。《美国房屋协会手册》《基本原则和住宅建筑规范》给出了广泛的框架建议值:从10%到25%。在施工期间，对180栋木框架住宅进行了审计，以评估框架的数量。这些住宅分布在美国的五个地区（东北部、东南部、中西部、西部和高地震区）以及三种住宅类型（单体独立、连接和多体）- 家庭）。确定了墙壁、天花板和地板的代表性框架系数。单位:I-PCitation:ASHRAE交易，第109卷，第。1.

Residential building energy codes require building assemblies to meet or exceed a specific R-value. To calculate the R-value requires knowledge of the percentage framing in exterior walls, ceilings, and floors. TheASHRAE Handbook—Fundamentalsand residential building codes present a wide range in recommended framing values: from 10% to 25%. One hundred and eighty wood-frame dwellings were audited during construction to assess the amount of framing. The dwellings were distributed in five regions of the United States (northeast, southeast, midwest, west, and high seismic regions) and for three dwelling types (single detached, attached, and multi-family). Representative framing factors were determined for walls, ceilings, and floors.Units: I-P