Site Preparation; Generator Foundation; Concrete Pad; Dimensions - Generac Power Systems D3.4L G16 Extended Tank Installation Manuallines

Site Selection and Preparation

Site Preparation

Generator Foundation

Install generator on a concrete pad or base slab able to
support its weight and accessories. All applicable codes
should be followed. A correct foundation is needed to
resist dynamic loading and reduce transmitted noise and
vibration. The exact composition of the mounting pad
must follow standard engineering practices for the
required loading and application. Securely fasten gen-
erator to foundation using suitable grade, size, and
style fasteners. Holes are provided in the base frame for
this purpose.

Concrete Pad

Follow all federal, state, and local codes when designing
a concrete pad or base slab.
Seat concrete pad on a prepared solid subsurface and
use appropriate reinforcing bar or expanded wire mesh.
A common specification calls for 2,500 psi (17.24 MPa)
concrete reinforced with 8 gauge wire mesh.

Dimensions

Extend concrete pad beyond the frame of the unit at least
6 in (15.2 cm). This provides space for maintenance and
repair.
The base pad must be:
• Capable of supporting 125% of unit wet weight for
single unit applications.
•
Flat and level to within 0.5 in (13 mm).
• Capable of withstanding severe torque reactions.
To calculate depth of concrete pad, the following formula
may be used:
Depth of Base =
W = Total wet weight of generator set in lbs (kg)
Density = Density of the concrete:
•150 pounds per cubic foot
•2,400 kilograms per cubic meter
B = Foundation width in ft (meters)
L = Foundation length in ft (meters)
Suggested mixture of concrete (by volume) is 1:2:3 of
cement, sand, and aggregate with a maximum 4 in (100
mm) slump with a 28 day compression strength of 3,000
psi (20.7 MPa).

Unit Clearance

Verify installation site provides easy access to generator
for maintenance, repair, and firefighting purposes. Keep
a minimum of 5 ft (1.5 m) of clearance around each side
of the generator to facilitate service or maintenance.
14
W
Density x B x L

Stub-Up Area

For load conduit, auxiliary power conduit (high voltage),
and control wiring conduit (low voltage), see unit installa-
tion drawings for the location and dimensions of the stub-
up area. Figure 3-1 illustrates a typical stub opening (A).
1.9 (50)
3.9
(100)
Figure 3-1. Installation Drawing Stub-Up Detail
(Typical)
Installation Guidelines for Protector Diesel Generators
In. (mm)
A
4.1 (104.5)
0.4 (9)
2.0 (51)
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