There’s plenty of info out there about this if you’re looking for it; proven and aviation industry approved methods.
Take a look at:
FAA Advisory Circular AC43.13-1b
Standard Aircraft Handbook for mechs and techs
ISBN 0-07-134836-0
Aviation Mechanic Handbook
ISBN 978-1-56027-591-6
Understanding Aircraft Structures
ISBN 978-1-4051-2032-6