CEMP-E
TI 809-26
1 March 2000
CHAPTER 2
APPLICABLE DESIGN SPECIFICATIONS
1. GENERAL.
a. Specification Cycles. Building design and welding design are governed by a variety of
specifications and standards, as listed. Because of the varying focus of each standard or specification,
and the varying dates of adoption and publication, the standards and specifications are in a constant
cycle of revision.
b. Specification Conflicts. Conflicts may arise between codes as new research and methods are
adopted in one code before another. There are also specific exceptions one code may take with another,
as the AISC Specification does with AWS D1.1, listing those exceptions in AISC Specification section
J1.2.
c. New Materials. New steels and welding materials, adopted by the industry, may not be listed in the
codes for periods of several years because of the adoption and printing cycles. Within AWS standards,
the filler metal specifications are being revised for metrication. The AWS D1.1 code is also being fully
metricated for the year 2000, with independent dimensional units and values. Those values established
as of the date of this document have been adopted. Others may change with the publication of the D1.1-
2000 Structural Welding Code - Steel.
d. Preferred Design Methodology. The American Institute of Steel Construction provides two
methodologies for the design of steel-framed buildings. The first method is Allowable Stress Design
(ASD), which provides adequate strength based upon service load conditions. All loads are assumed to
have the same variability. The second method, Load and Resistance Factor Design (LRFD), is a more
modern probabilistic approach also known as limit states design. LRFD uses load factors and load
combinations applied to service loads, and resistance (strength reduction) factors applied to the nominal
resistance of the component to achieve a design strength. Both methods are in current practice. The use
of the LRFD method is preferred over the use of the ASD method, but is not required.
e. Standards Evaluation. Users of this document should evaluate the various standards listed, and
new standards that may be published, for suitable application. It may be necessary to take exceptions to
various code provisions, or to expand the code provisions through the use of the project specifications, to
resolve conflicting issues and to permit new materials.
2. USACE AND OTHER MILITARY DOCUMENTS.
a. TI 809-01 Load Assumptions for Buildings. This document provides minimum snow and wind
loads plus frost penetration data to be used in the design and construction of buildings and other
structures. Except as designated within the document, all loadings are based upon ASCE 7-95, Minimum
Design Loads for Buildings and Other Structures. Buildings are categorized according to occupancy.
b. TI 809-02 Structural Design Criteria for Buildings. General structural design guidance for buildings,
and for building systems constructed of concrete, masonry, steel and wood is presented in this TI
document. The design requirements provided herein, or cited by reference, are based on national
building codes, industry standards, and technical manuals developed by the Army, Navy, and Air Force.
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