TJ Insulated products from iLevel by Weyerhaeuser are structural framing materials that meet 2011 Energy Star for Homes and 2009 International Energy Conservation Code requirements. The collection includes headers (which have an R-value of 17), rim boards (R-value of 10), and corners (R-value of 30) and features integrated preassembled components with higher R-values and reduced thermal bridging than traditional framing products. The components are available in standard sizes to fit 2'-by-6' conventional framing dimensions. The headers allow loads to be carried directly through into the wall framing.