Again, solid 1-by-8 lumber is recommended.

For forms, use either solid lumber or thick plywood.

Strips are solid lumber about three and one-half inches wide and interlock side by side.

"It's 20 feet of solid lumber and there is a lot of bulk to it," Mr. Kornblau said.

I-joists were designed to help eliminate typical problems that come with using solid lumber as joists.

Use 1 x 6 or 1 x 8-inch solid lumber or plywood to make the cabinet sides, top and bottom.

Another easy method is to attach thin strips of solid lumber to the edges with glue and nails.

Some products may burn more quickly than solid lumber.

They require more primary energy for their manufacture than solid lumber.

Consider whether these meet your needs or whether you will benefit more by obtaining solid lumber, plywood or other material and making the shelves yourself.