The Keystone XHDTK 70 is an extra heavy duty load lintel used to support openings with cavity widths of 70-85mm. For use with timber frame construction. All timber frame lintels must be installed with restraining clips and a timber pinch batten to prevent rotation of the lintel during the building stage. Propping may be used to facilitate speed of construction. The XHDT/K range can be supplied to suit alternative cavities: e.g. specify XHDT/K-50, XHDT/K-90. Lintels may be propped to facilitate speed of construction. Manufactured in 150mm increments.