this section. Material used for supports shall be as specified in Section
05120 STRUCTURAL STEEL.
3.2.14.2
Pipe Hangers, Inserts, and Supports
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NOTE: Details of pipe supports in trenches will be
shown on the drawings. Mechanical and electrical
layout drawings and specifications for ceiling
suspensions should contain notes indicating that
hanger loads between panel points in excess of 50
pounds shall have the excess hanger loads suspended
from panel points.
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Pipe hangers, inserts, and supports 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 which has a vapor
barrier. Type 3 may be used on insulated pipe that does not have
a vapor barrier if clamped directly to the pipe, if the clamp
bottom does not extend through the insulation, and if the top
clamp attachment does not contact the insulation during pipe
movement.
c.
Type 18 inserts shall be secured to concrete forms before concrete
is placed. Continuous inserts which allow more adjustment may be
used if they otherwise meet the requirements for Type 18 inserts.
d.
Type 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 are not
acceptable.
e.
Type 20 attachments used on angles and channels shall be furnished
with an added malleable-iron heel plate or adapter.
f.
Type 24 may be used only on trapeze hanger systems or on
fabricated frames.
g.
Horizontal pipe supports shall be spaced as specified in MSS SP-69
and a support shall be installed not over 300 mm 1 foot from the
pipe fitting joint at each change in direction of the piping.
Pipe supports shall be spaced not over 1500 mm 5 feet apart at
valves.
h.
Vertical pipe shall be supported at each floor, except at
slab-on-grade, and at intervals of not more than 4500 mm 15 feet,
not more than 2400 mm 8 feet from end of risers, and at vent
terminations.
i.
Type 35 guides using steel, reinforced polytetrafluoroethylene
(PTFE) or graphite slides shall be provided where required to
allow longitudinal pipe movement. Lateral restraints shall be
provided as required. Slide materials shall be suitable for the
system operating temperatures, atmospheric conditions, and bearing
loads encountered.
SECTION 15569A
Page 67
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