3.4.3.2
Seismic Requirements
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NOTE: Provide seismic requirements if a Government
designer (either Corps office or A/E) is the
Engineer of Record, and show on the drawings.
Delete the bracketed phrase if seismic details are
not included. Sections 13080 and 15070A, properly
edited, must be included in the contract documents.
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Seismic Requirements for Pipe Supports and Structural Bracing: All piping
and attached valves shall be supported and braced to resist seismic loads
as specified under Sections 13080 SEISMIC PROTECTION FOR MISCELLANEOUS
EQUIPMENT and 15070A SEISMIC PROTECTION FOR MECHANICAL EQUIPMENT [as
shown.] Structural steel required for reinforcement to properly support
piping, headers, and equipment, but not shown, shall be provided under this
section. Material used for supports shall be as specified under Section
05120 STRUCTURAL STEEL.
3.4.3.3
Structural Attachments
Structural steel brackets required to support piping, headers, and
equipment, but not shown, shall be provided under this section. Material
used for supports shall be as specified under Section 05120 STRUCTURAL
STEEL.
3.4.4
Anchors
Anchors shall be provided wherever necessary or indicated to localize
expansion or prevent undue strain on piping. Anchors shall consist of
heavy steel collars with lugs and bolts for clamping and attaching anchor
braces, unless otherwise indicated. Anchor braces shall be installed in
the most effective manner to secure the desired results, using turnbuckles
where required. Supports, anchors, or stays shall not be attached where
they will injure the structure or adjacent construction during installation
or by the weight of expansion of the pipeline.
3.4.5
Pipe Expansion
3.4.5.1
Expansion Loops
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NOTE: Wherever possible, provision for expansion of
steam supply and return pipes will be made by
changes in the direction of the run of the pipe or
by field-fabricated expansion bends.
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Expansion loops shall provide adequate expansion of the main straight runs
of the system within the stress limits specified in ASME B31.1. The loop
shall be cold-sprung and installed where indicated. Pipe guides shall be
provided as indicated. Except where otherwise indicated, expansion loops
and bends shall be utilized to absorb and compensate for expansion and
contraction instead of expansion joints.
3.4.5.2
Expansion Joints
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SECTION 15559A
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