Wooden frame consists from individual 'boards' combined together (vertices are not merged so can be separated if needed)- for easier texturing.
Wheels have three parts: wheel base, wheel and wheel pin. Objects are named accordingly in all formats (there are 7 objects: wood_frame, wheel_base, wheel_base_1, wheel, wheel_1, wheel_pin and wheel_pin_1).
All polygon faces are single sided (for faster render) and closed (there are no objects with holes).
Normal angles are also included in all formats, in *.obj format too, for details on import *.obj file for XSI, Lightwave and Modo users I have attached read_me.doc in accompanying product files.
The model's dimensions are 1/10 of real world units. [1cm=10cm]
More details about polygons and wireframe are in full preview.