Historic Preservation
Structural
8.5" x 11" report, signed by qualified preservation
A structural narrative only needs to be submitted if a
architect, including
structural upgrade is part of the scope of work.
Narrative.
Narrative.
1. General: Project purpose, scope, groups and
1. Description of current structural systems, state of
individuals involved
repair, variances from present codes and available
spare load capacity. Data may be obtained from
2. Existing conditions, describing:
review of original construction drawings and codes
Overall building size, configuration, character
or from an analysis of the actual structure.
Project location
This report may have been completed as part of
Existing original materials and design, relevant
the Prospectus Development Study.
alterations
2. Identification of governing codes.
3. Preservation design issues and prospective solutions,
including:
3. Description of recommended changes to the
Location of new work/installation: visibility,
structural system, addressing:
impact on historic finishes
Structural materials, required selective demolition
Compare options for preserving/restoring historic
or alteration of existing structural elements, roof
materials and design
and floor framing system, means of resisting
Identify further study required to avoid adverse
lateral loads and connections between existing and
effects as applicable
new structural systems.
4. If a seismic safety study exists for the building,
Photographs.
describe any variations taken in design, compared to
General and detail views showing existing
the study's recommendations.
conditions at affected preservation zones, keyed
to plan showing location and orientation of each
Mechanical
view
Captions identifying location, subject, condition
A mechanical narrative only needs to be submitted if the
shown
alteration scope of work involves changes to the major
Drawings.
mechanical systems. Replacement in kind of all or part of
an existing mechanical system does not need to be shown
Reduced to 8.5" x 11, 11" x 17" foldout or placed in cover
at this stage of design.
pocket:
Site and floor plans, as applicable
Narrative.
Sketches or schematic CAD drawings (elevations,
1. Description of requested changes to existing systems.
plans) showing preservation design concepts
Describe HVAC and plumbing systems, including
available capacity versus criteria in Chapter 5 of
this document and operational characteristics.
334 F A C I L I T I E S S T A N D A R D S
FOR THE
PUBLIC
BUILDINGS
SERVICE
A.4 Alteration Projects Concept
Revised March 2005 PBS-P100
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