On Feb 9, 2:17 pm, (lp13-30) wrote:
I always want things like this to be many times stronger than actually
needed, but this is not going to require some 1/2" thick steel brackets.
Look at the weight a joist hanger will support vs. how light and flimsy
they look. Larry

A joist hanger works with gravity supporting the load from underneath
with multiple nails. Other larger nails also hold the joist in
place. If you want to support the beam it from above then it must be
supported from above perhaps with steel cables and turnbuckles. It
would be more than unusual.

Roof joists or collar ties are not usually large boards but they are
vital to the structural integrity and must be supported from
underneath and they should not be attached to the beam in the way
suggested. Rather, steel cable could be attached to the ridge beam
which could be beefed up would be a more likeley solution in this
unusual scenario.

No, it is not impossible but a more conventional approach can most
likely be used. If the OP insist one this wacky idea I suggest he
hire an experienced carpenter or engineer to OK the framing design.
From a practical standpoint I think the beam could be inside the room
and made to look nice with some moulding. That is a more conventional
solution and easier to design and execute.