Expert: Bruce E. Johnson - 9/20/2011

Question
I would like to install a 6ft patio door in a brick veneer exterior wall.The existing opening has a 5ft concrete lintel for the current  32in door and 15in window.
1.Do I have to remove the existing concrete lintel or can I just insert a new steel lintel under it?
2.How would I insert the lintel?

Thanks in advance for your advice. Carolann

Answer
Hi Carolann
Yes you can install a steel support for the existing lintel.  Generally speaking you over cut the opening on each side and slip a steel L angle (one flange up the other flange into the over cut and under the masonry.  The size of the L angle depends on what is needed to be supported but for an opening this size I would use at least a 3/16"x4"x4" angle and have it at least 4" past the opening at each side.  This isn't a difficult procedure but I always recommend that a structural engineer be consulted before altering any structural elements.  The angle is predrilled to accept 1/4" tap cons on the upside flange to keep it in place after installation. I hope this information helps please feel free to write again regarding this or other matters, sincerely Bruce Johnson...bejohnsonconsulting.com