3.5 Building Elements
Exterior Closure
Products constructed of carbon steel are not permitted in
exterior construction, which includes exterior walls, soffits
This section establishes design guidelines for the various
or roofs, except where protected by a galvanic zinc coating
building elements, which are defined as the physical
of at least 460 grams per m2 (1.5 ounces per square foot)
parts of building construction. These may be individual
of surface or other equivalent protection.
materials, assemblies of materials, equipment, or
assemblies of materials and equipment.
Exterior Wall Construction. Brick masonry design shall
follow the recommendations of the Brick Institute of
It is the architect's responsibility to specify construction
America (BIA) contained in the publications, Technical
materials and systems appropriate to the final design. For
Notes on Brick Construction.
additional requirements on fire protection and building
construction (e.g., types of construction, panel and
Concrete masonry design shall follow the recommenda-
curtain walls, fire stopping, and spray-applied fire resistive
tions of the National Concrete Masonry Association
materials), see Chapter 7: Fire Protection & Life Safety.
(NCMA) contained in the publication, TEK Notes.
Architectural precast concrete design shall follow the
Substructure
recommendations of the Precast Concrete Institute (PCI)
contained in PCI publication, Architectural Precast
Ground Water Control. The drainage mat and soil
Concrete, Second Edition.
filter should relieve hydrostatic pressure on substructure
walls and allow water drainage to the level of the drain.
Exterior limestone veneer design shall follow the
Drainage system piping may be clay tile or rigid PVC.
guidelines of the Handbook on Indiana Limestone
Pipes should not slope less than 1:200. Subsurface
published by the Indiana Limestone Institute of America.
drainage should discharge into the storm drain, by gravity
Marble veneer design shall follow the recommendations
if possible. Cleanouts shall be provided at grade to
in Exterior Marble Used in Curtain or Panel Walls
facilitate washing out the system.
published by the Marble Institute of America.
Waterproofing. Membrane waterproofing should
Vapor retarder must be provided in a building envelope
follow the recommendations of the National Roofing
where heat loss calculations identify a dewpoint within
Contractors Association (NRCA) as contained in The
the wall construction and in any building or part of any
NRCA Waterproofing Manual.
building that is mechanically humidified.
Underslab Insulation. Provide insulation under concrete
Exterior Cladding and Articulation. The use of different
slabs on grade where a perma-frost condition exists,
exterior materials, window designs, sun control devices
where slabs are heated, and where they support
and other design elements contribute to the design
refrigerated structures.
articulation of a building. Each of these components, their
use and how they are combined on a building must be
reviewed for opportunities provided for birds to roost
("bird roosts") on the exterior of the building. "Bird
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ARCHITECTURAL
AND
INTERIOR
DESIGN
3.5
Building Elements
Revised March 2005 PBS-P100
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