the nut; when that is not possible, the nut shall be removed and a threaded
coupler shall be installed of the same tightness as the original nut. The
test setup shall be checked to verify that the anchor is not restrained
from withdrawing by the baseplate, the test fixture, or any other fixtures.
The support for the testing apparatus shall be at least 1.5 times the
embedment length away from the bolt being tested. Each tested anchor shall
be loaded to [1] [_____] times the design tension value for the anchor.
The anchor shall have no observable movement at the test load. If any
anchor fails the test, similar anchors not previously tested shall be
tested until [20] [_____] consecutive anchors pass. Failed anchors shall
be retightened and retested to the specified load; if the anchor still
fails the test it shall be replaced.
3.4
RESILIENT VIBRATION ISOLATION DEVICES
Where the need for these devices is determined, based on the magnitude of
the design seismic forces, selection of anchor bolts for vibration
isolation devices and/or snubbers for equipment base and foundations shall
follow the same procedure as in paragraph ANCHOR BOLTS, except that an
equipment weight equal to [five] [_____] times the actual equipment weight
shall be used.
3.4.1
Resilient and Spring-Type Vibration Devices
**************************************************************************
NOTE: Retain either this paragraph or the one
below, as required by the project. Remove the
paragraph not needed.
**************************************************************************
Vibration isolation devices shall be selected so that the maximum movement
of equipment from the static deflection point shall be 13 mm 0.5 inches.
3.4.2
Multidirectional Seismic Snubbers
**************************************************************************
NOTE: Details of multidirectional seismic snubbers
will be shown in drawings if paragraph is retained.
**************************************************************************
Multidirectional seismic snubbers employing elastomeric pads shall be
installed on floor- or slab-mounted equipment. These snubbers shall
provide 6 mm 0.25 inches free vertical and horizontal movement from the
static deflection point. Snubber medium shall consist of multiple pads of
cotton duct and neoprene or other suitable materials arranged around a
flanged steel trunnion so both horizontal and vertical forces are resisted
by the snubber medium.
3.5
SWAY BRACES FOR PIPING
**************************************************************************
The bracing requirements shown below are based on
flexible piping. Supports for flexible piping must
consider an additional amplification of the piping
being in resonance with the building.
**************************************************************************
Transverse sway bracing for steel and copper pipe shall be provided at
intervals not to exceed those shown on the drawings. Transverse sway
SECTION 13080
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