3.3 Foundation
The foundation must be a permanent, rigid support for the subbase or floorplate. It should be an industri-
ally accepted design capable of absorbing excessive vibration.
Foundations are typically concrete with anchor bolts cast in to secure the pump.
An anchor bolt assembly consists of a bolt and washer with a sleeve 2-½ times the diameter of the bolt.
When the assembly is cast in concrete, the washer prevents the sleeve and bolt from being pulled. The
sleeve I.D. provides an adjustment allowance around the bolt. A lug is generally welded on the bolt to
prevent rotation when tightening.
Anchor bolts should be located in the concrete by a template dimensioned from the pump installation
drawing. The top of the sleeve should be temporarily sealed with waste material to prevent concrete from
entering during the concrete pouring operation. A typical anchor bolt arrangement is shown in
.
1.
Leveling wedges or shims left in place
2.
Dam
3.
19mm - 38mm | ¾ - 1-1/2" allowance for grit
4.
Finished grouting
5.
Subbase
6.
Top of foundation left rough - clean and wet down
7.
Pipe sleeve
8.
Washer
9.
Lug
Figure 2: Foundation
3.3.1 Installing pump on foundation
If subbases or floorplates were directly anchored to poured concrete foundations, surface irregularities
would cause distortion. Rectangular metal blocks and shims, or metal wedges having a small taper, are
placed beside each anchor bolt to level the subbase or floorplate (see Figures
Leveling with wedges
and
Leveling with blocks and shims
). The anchor bolts are then drawn tight enough to maintain position and
level.
To secure the shims in place and provide a level surface for the base or plate, grout is poured over the
concrete foundation. A 19mm to 38mm | ¾" to 1-½" grout allowance is recommended. When subbases
have cavities, grout holes are provided to fill all spaces. After the grout has hardened, permanently tight-
en the anchor bolts.
3.3 Foundation
Model JC Installation, Operation and Maintenance Instructions
13