Curved pergola designs are available online for free from websites such as Garden Structure and How To Specialist. The online resources offer do-it-yourself plans, instructions and materials needed to build the pergola based on the plan design.
A curved pergola design is accomplished by using weather-treated lumber and basic materials. A basic design can be relatively easy to accomplish in one weekend, according to Garden Structure. Pine, redwood or cedar are good choices to build a pergola, as they have a nice finish and are durable for outdoor use.
Once the design is chosen, lay out the design, making sure to have proper tools and quality materials. Apply several coats of stain to the wood components for added beauty and durability.