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 (4) Wind pressure shall be as computed in accordance with ANSI
A58.1 for exposure "C" and a wind speed of 100 miles per hour.
(5) Seismic loads will be calculated according to the Uniform
Building Code for the given area. If this load is greater than the computed
wind pressure, then the seismic load will be substituted for wind load in
all load combinations.
(6) Auxiliary and collateral loads are all design loads not listed
above and include suspended ceilings, insulation, electrical systems,
mechanical systems, etc.
(7) Combinations of design loads shall include the following (a)
dead loads plus live loads; (b) dead loads plus wind loads, and (c) 75
percent of the sum of dead, live, and wind loads.
e. Blast Evaluation of the Structure. Blast evaluation of the
structure utilizing the shop drawings prepared in connection with the above
design shall be performed by the design engineer. This evaluation shall be
performed in a manner similar to that presented in the report Design of
Steel Structures to Resist the Effects of HE Explosions, by Healey, et al.
The method of performing a dynamic analysis which describes the magnitude
and direction of the elasto-plastic stresses developed in the main frames
and secondary members as a result of the blast loads should be similar to
that described in the report by Stea, et al., titled Nonlinear Analysis of
Frame Structures Subjected to Blast Overpressures. This evaluation should
be made at the time of the shop drawing review stage.
f. Recommended Specification for Pre-Engineered Buildings.
Specifications for pre-engineered buildings shall be consistent with the
recommended design changes set forth in the preceding Section. These
example specifications are presented using the Construction Specification
Institute (CSI) format and shall contain as a minimum the following:
1.
APPLICABLE PUBLICATIONS. The following publications of the issues
listed below, but referred to thereafter by basic designation only,
form a part of this specification to the extent indicated by the
reference thereto:
1.1
American Society of Testing and Materials (ASTM)
A36-81A
Specification for Structural Steel
A307-84
Standard Specification for Carbon Steel Externally
Threaded Standard Fasteners
A325-84
Specification for High-Strength Bolts for Structural
Steel Joints
A446M-83
Specification for Steel Sheet, Zinc-Coated
(Galvanized) by the Hot-Dip Process, Structural
(Physical) Quality
A501-84
Specification for Hot-Formed Welded and Seamless
Carbon Steel Structural Tubing
2.08-241
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