Keystone leads the way with the development of a completely unique range of lintels to address the thermal requirements of new building regulations, which require that lintels should be assessed for their effect on the thermal performance of a building. The thermal performance of a lintel is expressed in terms of Psi Values (Ψ) i.e. linear thermal transmittance.
Standard load: HT/S-100, HT/S-110, HT/S-130, HT/S-150
Heavy duty load: HT/HD-100, HT/HD-110, HT/HD-130, HT/HD-150