For 200-300mm wall widths, it's manufactured length is 150mm increments. It is used for heavy duty loading conditions and 215mm solid wall construction. To achieve loading figures, lintel must be built in with block or brickwork. The IBEAM TJ lintel range is available to suit 250 to 300mm wide walls. It is designed for fast-track construction, the thin joint lintel can be used as two separate lintels when the contractor chooses to build and complete the inner leaf of the building prior to starting the outer leaf.