Can I use redwood and still build an economical deck?
  There are a whole range of redwood grades that can be used on decks. By carefully choosing the right grade you can save money and build a beautiful project.

The most economical grade for decking is Construction Common. With the strength to do the job, it contains a combination of heartwood and sapwood and will provide years of service.

For posts, beams and joists an all-heartwood grade of redwood is recommended. Construction Heart is the most economical grade for these applications.