Element B Shell
Exterior Enclosure
B2020 Exterior Windows
PART 1 - GENERAL
1.01
OVERVIEW
A. Includes windows, curtainwalls, and storefronts.
PART 2 - DESIGN CRITERIA
2.01
GENERAL
A. Windows shall include four-sided capture of the glass in painted aluminum frames with
structural sealant joints allowed within the frames. Configure windows for ease of cleaning.
Glass shall be insulated, low – E type, and shall meet or exceed u-value, solar heat gain
coefficient, and gross wall area requirements per ANSI/ASHRAE/IESNA 90.1.
B. The curtainwall system shall include full capture of the glass and prefinished architectural
metal panels at the perimeter painted aluminum frames. Structural sealant joints shall be
allowed at other locations. Configure curtain wall elements for ease of cleaning. Glass shall
be a combination of low-E and spandrel types. Test curtainwall in accordance with ASTM
E1105.
C. Provide insulated spandrel glass wherever the interior space will not benefit from vision glass
or where unfinished spaces or elements will be exposed if vision glass is used.
D. Storefront systems shall be painted aluminum frames and glass.
E. If wall construction requires a sill extension at windows, provide painted aluminum to match
window frame. Sill extensions shall be sharp corner extruded aluminum, in lieu of brake
metal type.
F. Windows and curtainwall shall have sill pans with end dams that extend from the exterior
face of the frame and turn up two (2) inches on the interior.
G. Provide features that enable safe window cleaning operations, particularly for securing points
on the face of the building to stabilize lines, davits and tie-backs on the roof and for
availability of water and electrical power at each roof level. Comply with recommendations of
the International Window Cleaners Association, ANSI/IWCA 1-14.1, ASME A120.1, and
requirements of OSHA 29 CFR 1910.66, OSHA 29 CFR 1926 Subpart M, and ANSI Z3592007.
H. The need for mounting of operable shades at exterior window heads shall be anticipated in
the design. Owner preference is for a design which conceals the shade enclosure from view,
by use of ceiling offset, recessed pocket, or other means.
The University of Texas
MD Anderson Cancer Center
ODG091610
EXTERIOR WINDOWS
B2020
1 OF 2
Element B Shell
Exterior Enclosure
B2020 Exterior Windows
PART 3 - SPECIAL CONTRACT DOCUMENT REQUIREMENTS
3.01
GENERAL
A. Curtainwall manufacturer shall prepare and seal all shop drawings.
PART 4 - PRODUCTS
4.01
GENERAL
A. Not applicable.
PART 5 - DOCUMENT REVISION HISTORY
Issue
Date
Revision Description
Reviser
01-01-07
Initial Adoption of Element
Rev. 1
08-14-08
Deleted requirements considered to be project-specific;
clarification on sill extensions and window cleaning.
DBB
Rev. 2
9-16-10
Added 2.01 H.
JC
Rev. 3
Rev. 4
Rev. 5
END OF ELEMENT B2020
The University of Texas
MD Anderson Cancer Center
ODG091610
EXTERIOR WINDOWS
B2020
2 OF 2