There are a variety of softwoods listed in various codes and regulations which are suitable for structural use in buildings. They behave elastically, are good in bending, tension and compression, but some of the softwoods may not be easily purchased, or if they can be, are not up to the required quality. This leaves the structural designer in a quandary. The easiest way out is for the designer to specify a strength rather than specifying a species and grade. If this method is adopted, it is essential that where joists, planks and framing are being used, the builder uses timber, the strength of which can be easily recognised. Therefore, it is strongly recommended that structurally graded timber is used, which can be identified by the marks on each piece of timber. To keep the cost down, it is also recommended to use species which are readily available from timber merchants and this may differ regionally throughout the country.