Simply attaching the frame, barrow tray, wheel, etc together.  
Very simple assembly, everything just bolts together.  
65L Galvanized Garden Wheelbarrow
Load capacity: 100KG.
Water capacity:65 Liter  
Wheel: 13''×4.00-6 Pneumatic wheel
Galvanized steel tubular and tray
Poly rim and grips
Size: L/H/C/A/B/h(mm):1305/620/585/815/610/215