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Transcript of Built heritage documentation
INTRODUCTION TO THE ARCHITECTURAL CONSERVATION PROJECT FOR THE
FACADES OF THE ROYAL PALACE OF STOCKHOLM
Heymowski A.a, Günther L.b, Myrin M.c, Andersson E.a, Hägnefelt U.d, Valanis A.d
a HOS Arkitekter AB, (andreas.heymowski, elias.andersson)@hosark.se, Sweden b National Property Board of Sweden
c Tyréns AB, Sweden d Norconsult AB, Sweden
The Royal Palace of Stockholm Style: Baroque
Built: 17th century
Architect: Nicodemus Tessin
42,000 m2 total area
1430 rooms (closets, basements etc)
972 windows
28 free standing statues
717 balustrade pieces
28,000 m2 total facade area
The facades of the Royal Palace
9500 m2 stone facade 11,000 m2 plaster 7,500 m2 windows and doors 28,000 m2 total facade area
Façade Materials Sandstone (Gotland & Roslag) Plaster Tin, Copper, Iron Wood, Glass
Examples of stone decay
2010 Project Directive formal declaration of commence
of action and official terms for the project entitled:
2011 Pilot Project investigation of practical aspects
and guidelines and specifications for the implementation of the full façade work
The project step by step
2005 Detachment of a piece of decorative sandstone from the façade
Long-term maintenance of facades Software engineering; investigation,
guidelines, pre-planning 2006 Maintenance program i.e. determination of the actions
required for the preservation of the entire palace
2009 Preliminary Study investigation into the condition of
the facades and suggested coarse of action by means of a dedicated project
Past projects for the restoration of the facades
1697 – Start of construction 1760 – Tessin’s Death 1830 – Completion of construction
Partial replacement of the sculpted stone
Extensive stone restoration, stone replacement and
use of oil solutions Work on the
façade plaster
Stone work and conservation of all of the façade
windows
Connection to the ICOMOS guidelines Challenges: • plethora of parameters and aspects • non-linearity in the decision-making process • extensive testing, evaluation and continuous update of processes in
order to establish a concrete plan for remedial measures The applied approach :
Maintenance program: Establishment of clear targets and definition of
values and objectives of the program, Preliminary Study: Completion of the required investigation and
research, to determine standards, requirements and processes
Pilot Project: Implementation, evaluation and potential update of the proposed methods for remedy and control.
Values and Objectives of the program Authenticity of material
Identification and preservation of the original stone façade to the greatest extent possible
Shape integrity it cannot be allowed to let the artistic and architecturally significant elements wither to the point that the shape is lost
cases of conflict
the form's authenticity and fidelity to Tessin's ideas is more significant Decisions
should be made on a case to case basis in order to preserve the authentic material to the greatest possible extent
The Preliminary Study “the most mature and concrete part of the project so far” “qualitative assessment of the structure” CONTENT
- Research carried our regarding: the construction of the palace past trauma and previous maintenance programs structural modifications changes of use
-Inventory activities detection, classification and evaluation of visible damages
(structural damages and irregularities) and decay of materials
The Pilot Project Duration: February 2010 – end of 2011 “quantitative assessment of the structure” CONTENT
the investigation of the structural behavior of the Palace actual assessment of structural damage Investigation of material decay decision regarding appropriate remedial measures geometric documentation of the palace
Goals of the Pilot Project Selection of appropriate substitute materials
Criteria for the choice between the conservation or replacement of pieces
Non-invasive methods of intervention (modern or traditional)
Standards and requirements of the geometric documentation process (accuracies, equipment, deliverables)
Methods for the assessment of the structural behavior of the structure
Requirements for monitoring applications
Frequency and nature of documentation processes
3D recording, modeling and printing methods
Quality measures and reports
Project Team
The National Property Board of Sweden (owner of the palace and manager of the project)
Prof. Andreas Heymowski (the palace architect) HOS Arkitekter AB (historical and architectural investigation, production
of drawings.) Tyréns (stone restoration , design and a structural engineering) Norconsult AB (acquisition of laser scanner data and production of
orthophotos)
Outlook of the entire project
Geometric documentation of the facades
-Terrestrial laser scanning -Image acquisition -Pointcloud drawings -Orthophotos -Line-drawings
Data Acquisition
Pointclouds and line-drawings
Pointclouds and line-drawings
Pointclouds and line-drawings
Photogrammetric processing
Orthophotos
Orthophoto scale 1:20 pixel size: 2.5mm
Orthophotos and point clouds
Completion of line drawings
Completion of line drawings
Comparison to old drawings
differences up to 35 cm
Old drawings
New drawings
Orthophoto drawings
Restoration plans
Conclusions & Future work
Currenlty Overview of the processes of research, documentation and decision making for a large architectural heritage conservation project in conjunction to the ICOMOS “Recommendations for the analysis, conservation and structural restoration of architectural heritage” An example of the steps a team may follow from research to implementation Future work Completion of the pilot project Development of a concrete plan for the entire project Information management
Thank you for your attention