Prior Information Notice With Call For Competition Partition WallsPrior Information Notice Automatic Vertically Retractable Acoustical WallDescription Specifications Automatic Vertically Retractable Acoustical Wall Retracts Into The Ceiling Acoustics Stc 60 No Floor Or Wall Tracks Fully Automated And Quiet Easy To Use Turn Key Operation Flat Rigid And Light Weight Variety Of Finish Options Conserves Floor Space The University Of Amsterdam Is Intended To Use The Skyfold System Which Can Supply Install And Maintain An Automatic Vertically Retractable Acoustical Wall All Necessary Hardware Seals Lifting Machinery And Electrical Controls Included With The Following Minimum Specifications Automatic Vertically Retractable Acoustical Wall From Here On Called Operable Wall Shall Refer Specifically To Acoustical Operable Walls That When In The Down Position Closed Are Hard Rigid Flat Plumb Walls Made Of A Grid Of Rectangular Acoustical Panels And When Are Lifted Opened Fold Upward Vertically Without The Use Of Any Manual Labor In A Manner Similar To An Accordion Into A Pocket In The Ceiling Between Roof Joists Or Up Between Built In Bulkheads In The Down Closed Position The Wall Shall Be Comprised Of 2 Vertical Planes Of Acoustical Panels Separated By An Acoustical Air Space The Operable Wall Shall Open And Close In A Manner Similar To An Accordion In That All Wall Panels Fold And Unfold At The Exact Same Time At The Exact Same Rate The Operable Wall Shall Open And Close At An Average Speed Of Approximately 5 To 10 Vertical Feet Per Minute 1 5 To 3 Meters Per Minute When The Operable Wall Is Being Lowered Closed It Fits A Staircase Perfectly And It Shall Stop If The Leading Bottom Edge Comes Into Firm Contact With Any Object Between It And The Floor The Wall Will Then Automatically Reverse Its Direction And Ascend For Approximately 3 Seconds To Clear The Object The Regular Operation Of The Wall Can Resume Once The Obstruction Has Been Removed Each Acoustical Panel Shall Be Individually Removable Using Only A Screw Driver No Special Tools Or Equipment Shall Be Required The Removal Of A Single Acoustical Panel Shall Not Affect Dislocate Or Cause The Removal Of Any Adjacent Panels Or Other Acoustical Panels The Operable Wall Shall Not Weigh More Than The Following 7 6 Lbs Per Ft2 37 1 Kg Per M2 A Completely Functioning Operable Wall Tested In Full Accordance And Compliance With Astm E90 Iso 140 3 Shall Achieve From An Independent Laboratory A Sound Transmission Class Stc Rating Rw Value Of Not Less Than The Following System Stc 55 Rw 54 Panel Construction Stc 61 Rw 60 The Operable Wall Shall Be Designed To Have A Design Life Of At Least 10 000 Complete Closed To Opened To Closed Cycles Please Contact The University Of Amsterdam Before The 4Th Of May If Your Product Can Meet All Technical Specifications
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