Where pipes pass through fire walls, fire partitions, fire rated pipe chase
walls or floors above grade, a fire seal shall be provided as specified in
Section 07840 FIRESTOPPING.
3.11
SUPPORTS
Hangers used to support piping 50 mm 2 inches and larger shall be
fabricated to permit adequate adjustment after erection while still
supporting the load. Pipe guides and anchors shall be installed to keep
pipes in accurate alignment, to direct the expansion movement, and to
prevent buckling, swaying, and undue strain. Piping subjected to vertical
movement when operating temperatures exceed ambient temperatures shall be
supported by variable spring hangers and supports or by constant support
hangers. In the support of multiple pipe runs on a common base member, a
clip or clamp shall be used where each pipe crosses the base support
member. Spacing of the base support members shall not exceed the hanger
and support spacing required for an individual pipe in the multiple pipe
run.
3.11.1
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NOTE: Provide seismic requirements for piping and
related equipment supports and show on the drawings.
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Piping and attached valves shall be supported and braced to resist seismic
loads as specified in Sections 13080 SEISMIC PROTECTION FOR MISCELLANEOUS
EQUIPMENT and 15070A SEISMIC PROTECTION FOR MECHANICAL EQUIPMENT [as shown
on the drawings]. Structural steel required for reinforcement to properly
support piping, headers, and equipment but not shown shall be provided.
Material used for supports shall be as specified in Section 05120
STRUCTURAL STEEL.
3.11.2
Pipe Hangers, Inserts, and Supports
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NOTE: Mechanical and electrical layout drawings and
specifications for ceiling suspensions should
contain notes indicating that hanger loads between
panel points in excess of 222 Newtons (50 pounds)
shall have the excess hanger loads suspended from
panel points.
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Pipe hanger, insert and support installation shall conform to MSS SP-58 and
MSS SP-69, except as modified herein.
a.
Types 5, 12, and 26 shall not be used.
b.
Type 3 shall not be used on insulated pipe.
c.
is placed. Continuous inserts which allow more adjustment may be
used if they otherwise meet the requirements for type 18 inserts.
d.
Types 19 and 23 C-clamps shall be torqued per MSS SP-69 and have
both locknuts and retaining devices, furnished by the
manufacturer. Field-fabricated C-clamp bodies or retaining devices
SECTION 15405A
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