Jordan concrete are the largest
  stockists of Birtley Steel lintels in Northern Ireland.
  These include the familiar cavity wall lintels and
  those to suit wider inner leaf lintels for use in
  timber frame construction. manufactured to order,
  steel lintels also include various styles of arches,
  sun-room lintels and support posts.
  Steel Lintel Brochure.
  Bay 6 Brochure.