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USACE / NAVFAC / AFCESA
UFGS-04270 (August 2002)
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Preparing Activity: USACE
Superseding
UFGS-04270N (September 1999)
UFGS-04200A (October 2001)(In part)
UNIFIED FACILITIES GUIDE SPECIFICATIONS
References are in agreement with UMRL dated 23 June 2005
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SECTION 04270
GLASS MASONRY UNITS
08/02
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NOTE: This guide specification covers the
requirements for glass block unit masonry work.
Comments and suggestions on this guide specification
are welcome and should be directed to the technical
proponent of the specification. A listing of
technical proponents, including their organization
designation and telephone number, is on the Internet.
Recommended changes to a UFGS should be submitted as
a Criteria Change Request (CCR).
Use of electronic communication is encouraged.
Brackets are used in the text to indicate designer
choices or locations where text must be supplied by
the designer.
The following information will be shown on the
1. Head, jamb, sill, and intermediate support
construction details.
2. Clearances required for deflection and expansion.
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PART 1
GENERAL
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NOTE: Refer to manufacturers data for glass block
unit panel size restrictions, limitations, and
details. CAUTION: 1) Single wythe construction is
not recommended for areas subject to severe
wind-driven rain exposure; 2) avoid removable panel
construction; and 3) avoid large expanses of
exterior walls subject to high wind pressures, wide
thermal variations, and differential movements
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SECTION 04270
Page 3
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