Cabinets, Furniture, Woodworks/Building oak bookcase

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Question
Thank you for your help. Project is building 79 inch tall bookcase from red oak. My plan is to use dada joints and wood glue with no metal screws and only wood for the bookcase.  The sides are 1.25 inch thick red oak 79 inches tall and 11 inches wide special ordered from lumber yard.  I have 1x12 red oak 3/4 inch  thick shelves that I want to make 66 inches wide. I have 1x3 red oak boards to use to put under front of shelves to keep the shelves from sagging. I want to use 1/2 inch deep dado slots to attach shelves to sides.  I know that 66 inch wide shelves are very wide and I am hoping the 1x3s will stop sagging . Is that possible and will wood glue hold everything together for many years.  Thanks much.

Answer
Hey Mark, there really is no need for such thick, specially ordered sides, unless it's an aesthetic choice for looks, and of course you know that 66 inch wide shelves are way to long, even with a 1x3" support. Unless you are just displaying a few feathers, there's no way these shelves will not sag over time. Glue should be fine, if done well, but the longest shelf span one should design is about 32", without some vertical support. You could design a vertical support system that supports the center of these long shelves,and is not part of the carcass, that transfers the weight down to the floor, but 66" without such support will not stay flat without sagging, period. Please post back if need be.
Regards, Greg

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Greg Scholl

Expertise

Questions on Woodworking, wood finishing and refinishing of all kinds, repairing furniture and wooden objects, Architectural details, Woodturning, carving, tool usage, product usage, some chemistry as it applies to woodworking and related interests,cabinet making and furniture construction/design, etc. I have experience with all manners of colorants, finishes, paints, stains, dyes, glazes, and coatings, wood species recognition and usage,tool recommendations, blade types and recommendation,techniques and methods for many Woodworking related issues, etc.

Experience

Fine furniture restorer and cabinet maker for over 30 years,serving high end Antique dealers, Interior designers, Collectors in the CT area. Consulting for area Painting/Decorating and Building contractors on non painting issues..(staining, wood prep.,clear finishing, floor restoration and architectural detail restoration and repair, etc.) Sold, built, serviced, setup Home, Industrial, and Commercial stationary woodworking tools for a major tool retailer in CT. for three years, sold hand and power tools , provided knowledge, parts replacement, service, and on site service, Trade show Demo, and training as well.

Publications
Published in Fine Woodworking Magazine (12/97), included on Fine Woodworkings first "Best of Fine Woodworking" CD-ROM (2002) ...("27 year compilation of expert know-how")

Education/Credentials
Art School at Silvermine Guild in Norwalk, CT., 9 year apprenticeship in a European run Cabinet and Restoration shop in CT., various classes on subjects having to do with the field. Seminars from major Tool manufacturers, Skil/Bosch, Delta, Powermatic, Ritter, Porter cable, Milwaukee, Dewalt/B&Decker, Performax.

Past/Present Clients
Many varied clients including work on Martha Stewarts' Westport, CT. show house, many fine Antique dealers and private collectors in and around Fairfield County and in Woodbury, CT. (the Antiques capital of CT.), Golden Age of Trucking Museum,Consulting for area Painting/Decorating and Building contractors on non painting issues..(staining, wood prep.,clear finishing, floor restoration and architectural detail restoration and repair, etc.), local Museums and Historical Societies. For the last two years I have been employed with Schwenke Auctioneers Inc.- Woodbury Auction LLC., as a staff photographer,IT tech,and doing restoration and repair work as well.

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