Tenders Are Invited For Metalworking - Preliminary Announcement Of The Supplementary Order For The Conversion And Renovation Of Iba Terraces - Lot 4: Metal Construction Work (Windows, External Doors, Vhf, Shading)

Metalworking - Preliminary Announcement Of The Supplementary Order For The Conversion And Renovation Of Iba Terraces - Lot 4: Metal Construction Work (Windows, External Doors, Vhf, Shading). The Order According To The Previous List Of Services Included The Following Services: - Partial Dismantling Of A Curtain Wall Horizontally And Vertically And Expansion Of Openings In External Walls - Adaptation/Addition To The Substructure Of The Curtain Wall - Demolition Of Existing Windows And Door Elements - Work Planning, Assembly, Delivery Of New Window And Door Elements (House 2) - Production And Installation Of A Spiral Staircase (1 Floor, House 2) - Adjust Existing Sun Protection And Provide It With Textile Covering (House 2) - Dismantle The Sun Protection System And Deliver And Install A New Sun Protection System To Match The Existing Post-Transom Facade (House 3 ) New Services: - Demolition Of Existing Post-Transom Facades On The Ground Floor And Upper Floor (House 2) - Production And Installation Of New Post-Transom Facades On The Ground Floor And Upper Floor Including Door Openings And Window Sashes (House 2) - Requirements In Accordance With. Geg Triple Insulating Glazing With Neutral Sun Protection Glass Ug < 0.7 W/M2k, Ucw < 0.9 W/M2k - New Drainage Channel With Running Rail For Shading In Front Of Prf Costs: The Additional Costs Are A Maximum Of Eur 153,000 (Gross) Reason: In The Course Of During Construction Work, The Screed On The Ground And Upper Floors Was Demolished. The Leaks In The Post-And-Beam Façade Were Identified Through A Heavy Rain Simulation. There Is Also No Facade Gutter For Rain Drainage, So That Rainwater Could Penetrate Through The Barrier-Free Door Openings In The Threshold Area. Due To This Constant Water Ingress, The Post-Transom Façade Has Corroded At The Base. The Seals Are Dilapidated Or Already Broken. In Order To Be Able To Arrange And Apply The Waterproofing Layer Correctly, The Post-Transom Facade Must Be Removed. A Concrete Cantilever Runs Above The Buildings, This Has Settled Over The Years, Causing Tension In The Prf. The Window Panes Are Cracked And The Doors Are Difficult To Open And Close. Adjusting The Doors Is No Longer Possible. An Additional Running Rail For The Existing Shading Elements Must Be Installed In The New Facade Gutter, As These Detach From The Previous Base Points And Therefore Get Caught And Are No Longer Functional. Due To The Ongoing Construction Work And Numerous Companies Already Committed, It Is Necessary That The Construction Process Is Not Delayed Unnecessarily And That The Construction Work Can Continue Continuously Despite The Renewal Of The Prf. A Tender For These Services Would Lead To A Halt To Construction Of The Entire Construction Project And Thus Cause Additional Costs (Maintenance, Contract Adjustment/Price Adjustment).