I would suggest that you contact IBRA regarding Kenya Top Bar Hives
(KTBH's).  They will more than likely have plans and examples of
top bar hives.  These hives are great for low-tech development projects
involving beekeeping.  As a matter of fact, we used these in Honduras
for use with Africanized Bees.  Their simplicity of design and low-cost
make them very attractive.  However, they will in no way allow you the
type of "freedom of management" that you would have in using Langstroth
equipment.  If you don't have any luck, please e-mail me at
[log in to unmask] and I will dig up some designs for you.
Matt Ter Molen.  Evanston, Illinois.