"Eric in North TX" wrote in
oups.com:


There is no doubt that it could be done,

In one area the code required me to put a steel "flitch" plate
sandwiched between the headers on a 16' (I think) span. That was new
construction. Beats the hell outta me how you would do it with old work.

http://www.toolbase.org/PDF/DesignGu...tch%20plate%22

the question is; should it be
done. As you drive around check out older installations of big doors,
see how they all sag in the middle when raised.


Hell, I had 1yr old single doors do that on new construction. Wood.
Sub-k replaced them with metal. Solved that. Quality wood doors with
good bracing may be fine. Dunno.