[TubaMorg]

A nice strong structural shape is an arch. I didn't see any rules against using water. Build a perfect arch template then soak your popsickle sticks in water to make them more flexible and fit them over your template. Clamp them in place and allow them to dry. Maybe double layer of overlapping sticks for each arch. When dry glue them together. Use sticks on base to keep the legs from spreading apart. Make several arches and frame them together with adequate platform to support the weight.