Adjustable Art Table Team 9 Bruce Bassi Kristen Haldeman Richard Sierra Client Coordinator: Dr. Brooke Hallowell Supervising Professor: Dr. John D. Enderle Funding: National Science Foundation

Background Information Passion Works Studio Studio for artists with disabilities Previous NSF Tables Unstable Required cords Exposed electronics

Currently Marketed Adjustable Tables Available Lack of wheelchair accessibility Not easily adjustable Electric

Our Previous Design Components Gas Springs Gear Rack Tabletop 30”x42”

Our Previous Design Rear View Side View

Problems With Old Design Needs of the client changed Old table was designed for one person Must be used by multiple people Previous parts incompatible with large table

Final Design Components Tabletop 72”x30” Gas Springs Unibearings

Tabletop Round edges 6 feet long Easy to clean

Gas Springs Stroke length: 13” Can hold 2,000 lbs Locking Slowly raise with 14 lbs force

Hydraulic Release

Unibearings Can hold up to 300 lbs User must unlock upper and lower brakes

How to use unibearings Must be disengaged to adjust table Make sure that the unibearings are tight before the table is used

Unibearing testing Unibearing testing at the SRF

Framing Gussets

Framing and Tabletop Extrusions attached to bottom of tabletop in 8 places Gussets hold legs to the tabletop

Four base extensions prevent rocking

Budget Allotted $750 Part Manufacturer Quantity Total Cost Original Tabletop Officemax 1 $78.72 Locking Gas Spring Easylift of America 2 $194.06 Parallel Hydraulic Release $113.45 Shipping $13.88 Handle (not used but purchase for design prior to changes) MSC Industrial Supplies $21.86 1” by 1” Aluminum Extrusion Air Inc 249” $55.99 1” by 3” Aluminum Extrusion 62” $32.24 New Tabletop Staples $64.99 8020 Accessories -- 154.34 Gussets Home Depot $15.00 Total $812.73

How to use table To Raise Table To Lower Table

Testing Final Product The table works well with wheelchairs Original requirements have been met

Acknowledgements Dr. Enderle Chris Liebler NSF Funding Rich and Serge from the machine shop Tracy Makuch

Questions …thanks for listening

Appendix The following figures and tables have been included to aid in explanations for questions.

Gas Spring Specifications Stroke Length Diameters of Rod/Piston Force of Gas Length of Gas Spring (Fully Extended) Blocking Force 350 mm (13.78 in) 10/22 mm (.4/.87 in) 115 N (25.8 lbs) 927 mm (36.5 in) 12000 N (~2,700 lbs)

Gas Spring

Parallel Hydraulic Release

Debcor Debcor $535 Not easily adjustable Not wheelchair accessible Sharp edges

Balt Easy Model 3627 $378 Not for artists No leg room Height adjustment out of desired range

Closet Masters Closet Masters $780 Good: Drawing surface, ease of adjustment Bad: Electronic, no leg room

References 1. http://nsf-pad.bme.uconn.edu 2. http://www.closet-masters.com/Ergonomics_SF/Height_adjustable_tables/ 3. www.EasyLiftSprings.com 4. http://www.dickblick.com/zz501/00/ 5. http://888ergodir.com/Merchant2/merchant.mvc?Screen=PROD&Product_Code =WOW&Category_Code=WS