TP-6833 2/16
13
Section 2 Installation
2.4 Seismic Certification
Automatic transfer switches with seismic certification
must be installed according to the instructions in this
section. Also refer to ADV-7456, the Certificate of
Compliance provided with the ATS, and the installation
(ADV) drawings for the transfer switch.
Abbreviations:
ACI: American Concrete Institute
IBC: International Building Code
r
S
DS:
Design spectral response acceleration at short
period, as determined in Section 1615.1.3 of
the IBC
R
p
:
Equipment response modification factor
I
p
:
Equipment importance factor
a
p
:
In-structure equipment amplification factor
Refer to the International Building Code
r
for more
information.
General Seismic Installation Notes:
1. Anchors used for seismic installation must be
designed in accordance with ACI 355.2--04.
Suggested manufacturers include Simpson,
Ramset, and Hilti.
2. Anchors must be installed to a minimum
embedment of 8x the anchor diameter.
3. Anchors must be installed in minimum 4000 psi
compressive strength normal weight concrete.
Concrete aggregate must comply with ASTM C33.
Installation in structural lightweight concrete is not
permitted unless otherwise approved by the
structural engineer of record.
4. Anchors must be installed to the required torque
specified by the anchor manufacturer to obtain
maximum loading.
5. Anchors must be installed to the anchor spacing
required to obtain maximum load and edge
distance required to obtain maximum load unless
otherwise approved by the structural engineer of
record.
6. Anchors used for seismic installation must be
designed and rated to resist seismic loading in
accordance with ACI 355.2--04 and documented in
a report by a reputable testing agency (for
example, the Evaluation Service Report issued by
the International Code Council).
7. Wide washers must be installed at each anchor
location between the anchor head and equipment
for tension load distribution. See applicable ADV
drawing for specific anchor information and washer
dimensions.
8. Equipment installed on a housekeeping pad
requires the housekeeping pad thickness to be at
least 1.5x the anchor embedment depth.
9. All housekeeping pads must be seismically
designed and dowelled or cast into the building
structure as approved by the structural engineer of
record.
10. Rebar reinforcing in the housekeeping pad is
required for all installations.
11. Concrete and rebar reinforcing must be designed
in accordance with ACI 318--05.
12. Wall mounted equipment must be installed to a
rebar reinforced structural concrete wall that is
seismically designed and approved by the
engineer of record to resist the added seismic
loads from components being anchored to the wall.
13. Floor mounted equipment (with or without a
housekeeping pad) must be installed to a rebar
reinforced structural concrete floor that is
seismically designed and approved by the
engineer of record to resist the added seismic
loads from components being anchored to the
floor.
14. When installing to a floor or wall, rebar interference
must be considered.
15. Equipment attached to any structural floor other
than those constructed of structural concrete and
designed to accept the seismic loads from the
mounted equipment are beyond the scope of this
specification.
16. Installation to light-weight concrete over steel
decking is beyond the scope of this specification.
17. Installation to concrete block or cinder block walls
is beyond the scope of this specification.
