Quantcast Steel Design

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Custom Search Architectural, Mechanical, Electrical and Other Nonstructural Components Design:
As a minimum, all design shall be based on the requirements for Seismic Design
Category D.
a. Seismic anchorage and restraint details shall be provided for all equipment that
exceeds 400# (180kg) in weight. If exact weights and dimensions are unknown,
details shall be based on the best information available, and may be modified
during construction if original design assumptions prove to be inaccurate.
b. Support and seismic restraint shall be detailed for all ducts, pipes,
suspended equipment etc. Reference to generally accepted standards such
the "SMACNA Guidelines" are acceptable for ordinary installations.
c. Support and seismic restraint of all ceiling systems shall be detailed. Details to
include compression struts at all locations where diagonal splay bracing
occurs. Foundation Design: As a minimum, all foundation design shall comply with
section 7.5 (Seismic Design Categories D,E & F) of FEMA 302. Steel Design: As a minimum, all steel design shall comply with section 8.4
(Seismic Design Categories D, E and F) of FEMA 302. Member design shall be based
upon the requirements in Part 1 of the AISC publication "Seismic Provisions for Structural
Steel Buildings" dated April 15, 1997.
a. Design using "Special Moment Frames" (SMF) requirements- chapter 9
"Intermediate Moment Frames" (IMF) requirements chapter 10, "Ordinary
Moment Frames" (OMF) requirements chapter 11 or "Special Truss Moment
Frames" (STMF) requirements chapter 12 of the "AISC seismic
Provisions" will not be permitted without advance written approval from Code
04CN.EH, Southwest Division.
b. Design of concentrically braced frames shall comply with chapter 13 "Special
Concentrically Braced Frames" (SCBF) of the "AISC Seismic Provisions." Attention is
called to section 13.3c and commentary section C13.3c for the 2t set back exception
when critical buckling is out of plane of the gusset plate. Attention is also called to
section 13.4a.3 for the post buckling unbalanced vertical load on the beam
c. Design using "Eccentrically Braced Frames" (EBF) requirements chapter 15
of the "AISC Seismic Provisions" are permitted unconditionally unless the
design involves link-to-column connections. In accord with section 15.4a, link-
to-column moment connections require tests that demonstrate inelastic rotation
capability and therefore must be approved in writing by Code 04CN.EH
Southwest Division.


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