Sounds like you need a buddy at an air operator who has the Parts Catalog, Flight Manual, and Maintenance Manual beside his desk.  Sorry, I don't know anybody at a DHC-8 operator, but you might find some companies to contact by looking at who operates DHC-8's.  Calling cold won't work, though.
Do you have a modification project in mind?  If so, make a pitch to an operator to develop the project together.  If you make a deal, they might make all the data available (including the freedom to measure actual airplanes).
DeHavilland (oops, "Bombardier") has differing attitudes toward different aircraft.  They're getting more and more comfortable with farming out information of the Beaver and even the Twin Otter, because they aren't in production any more.  You can go to their library and, for a fee, read all the engineering data you can absorb.  Since the DHC-8 is still in production, I doubt you would have this liberty.

STF

WHy do you need this trhis information?

Nigel Waterhouse & Associates
Aeronautical Consulting Engineers

Transport Canada and F.A.A approval & certification of fixed and rotor wing aircraft alterations: Structures, Systems, Powerplants and electrical.  FAA PMA, TC PDA.
n_a_waterhouse@hotmail.com

The FAA web site contains the Type Certificate Data Sheet for this airplane (NM13). It contains the FAR minimum required G load capabiltiy.

HI BUD - JANES + FLIGHT MAGAZINE ARE GOOD AT THIS - THEY WOULD HAVE THE NICE SHOTS ETC. - YOU NEED - ASK THEM - J.C.

Many be I don't understand the question, but loads are normally just calculated from the appropriate part of 14 CFR or other predecessor regulations.  The execption being landing loads which are normally arrived at by test.

Cheers

  I work in Engineering at deH and all the info you are looking for is in the public domain in one form or another so there is no difficulty disclosing this descriptive material to you (Maintenance Manuals, sales brochures, TCDS, publicity material and so on).

 I will put a package together in the next week or so. If you can provide me with your postal address, I will fire it off to you...


MerlinMagister

MKVB

HI GUYS - JUST WANTED TO SAY THANKS TO THE GOOD OLD DHC GUYS THEY HAVE ALWAYS BEEN VERY HELPFUL TO ME AND THE OTHER A+Ps IN AVIATION  - NICE TO SEE NOUGHT HAS CHANGED UNDER BOMARDIER - WE STILL HAVE LOCAL AIRLINE AERO PELICAN HERE OPERATING DHC-6-300 - GREAT LITTLE BIRD ! AM IN THEIR MAIN  CORPORATE HANGAR HERE - ALL THE BEST J.C.= OLD SHORTS A+P
LOVE THE MERLIN MAGISTER MK VB !