Tenders Are Invited For Emergency Restoration And Conservation Of Ruins In The Southeastern Part Of The Kaleto Fortress, Part Of Montana Ancient City

Construction Is The First Category, According To Art. 137, Para. 1, Item 1, B M And B. H Of The Spa And Art. 2, Para 12 And Art. 3 Of Ordinance No. 1 Of 30.07.2003 On The Nomenclature Of The Types Of Construction. To Ensure Compatibility With Existing Cultural Tissue And Minimal Intervention In The Original Substance, The Following Principles And Approaches Are Required: 1. Cleaning Of Masonry: Only Manual, Mechanical Cleaning With Brushes, Without The Use Of Abrasive Disks Or Machines; It Is Prohibited To Use Water Jets, Sandblasts, As Well As Chemicals Without Written Approval By The Designer And The Contracting Authority. 2. Jointing And Recovery: The Grouting Solution Should Be On A Lime Base-Lime-Sand Mixture In A Ratio Of Not Less Than 1: 3; Do Not Use Cement Or Supplements That Increase The Hardness Above The Original Wall; Rebuilding To Be Performed By Anastylosis Or Marked New Masonry, Clearly Distinguishable In Color And Texture From The Original. 3. Strengthening And Structural Stabilization: All Temporary Reinforcements Be Coordinated With Copyright Supervision; Injection With Polyurethane Resins Or Other Chemicals Without Prior Approval Is Prohibited; If The Anchoring Is Needed - The Use Of Small Diameter Stainless Reinforcement, Without Entering Areas With Well -Stored Masonry. 4. Antinosal Protection: In The Presence Of Visible Salts On The Surfaces-Compulsory Preliminary Consultation With A Specialist Resistor; If Hydrophobiors Are Used, They Must Be Compatible With Lime Bases And Vapor Permeable. 5. Documentation And Test Sections: The Contractor Must Offer For Approval A Test Section (Minimum 1 M²) Before The Mass Application Of Each New Type Of Intervention (Grouting, Cleaning, Coverage); The Contracting Authority Has The Right To Suspend The Process In The Case Of Cultural Value As Harmful To Cultural Value. For The Purpose Of Cultural Interpretation And Exhibiting, The Contractor Should Design And Install A Siege Facility (Ram) - A Replica Of A Removable Ram, Used In Late Antiquity Or The Middle Ages - With A Visor, Hanging Beam And Strengthening With Ropes.