There is a wheelbarrow with steel handles and a steel body featuring a handbrake on the handle. This can be important when you are going down a hill with a heavy load. You can control the wheelbarrow so it doesn't get out of control.
Another wheelbarrow has a very large plastic tub. This model also has two wheels in front which makes it more stable. The wheelbarrow is harder to turn over with the added stability.
A third type of wheelbarrows is different from the rest because it has the location of the wheel further back. This puts the cargo weight on the wheel instead of in your hands.
Research wheelbarrows to get the model which meets your project's needs. Tim even uses it for a quick break on the project.