DYO House Plans Lintel Sizing Chart sizes lintels for openings which span 2' to 19'. The chart is based on bearing truss spans of up to 50'. The design criteria for the chart are as Dead load of 24 psf, Live load of 16 psf with concrete roof tiles. The chart uses Powers Steel lintels. The chart is in PDF format. This chart makes an outstanding quick reference for lintel sizes. From DrawYourOwnHousePlans, check out our website for more helpful products.