Floor Beam Fixity data for Boeing Aircraft?
Floor Beam Fixity data for Boeing Aircraft?
(OP)
I'm in the middle of evaluating a structural modification to install some extended first and business class seating to a Boeing 747 (upper and lower deck). We are, of course, working conservatively but I'd prefer not to make unnecessary mods to primary structure.
I ran across some floor beam fixity data for a B757 (generally around 40%), but I was wondering if anybody had similar data for the B747 that was "blessed by Boeing" as it were?
Thanks
Joe
I ran across some floor beam fixity data for a B757 (generally around 40%), but I was wondering if anybody had similar data for the B747 that was "blessed by Boeing" as it were?
Thanks
Joe
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Joseph K. Mooney
FAA DER Structures





RE: Floor Beam Fixity data for Boeing Aircraft?
By the way I am working on a 737 - same cross section as your 757. I have seen 50% used for frame fixity. I guess by 40% fixity you mean to use a value of 40% of the bending moment at the frame for the fixed condition as the bending moment in the frame due to floor loading???
RE: Floor Beam Fixity data for Boeing Aircraft?
Cheers
Greg Locock
Please see FAQ731-376 for tips on how to make the best use of Eng-Tips.
RE: Floor Beam Fixity data for Boeing Aircraft?
RE: Floor Beam Fixity data for Boeing Aircraft?
rb1957 - That's what we wound up doing, I was just hoping to minimize impact to the overall structure. Got a 767 coming up and we are just going to model the whole sha-bang.
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Joseph K. Mooney
FAA DER Structures