3-4
3.4 Foundation
(1) The foundation must be rigid enough to bear the weight of the fan and the vibration and load
caused by the rotation, and also must be made of noncombustible material.
(2) Make sure that the horizontal plane of the foundation concrete will not be changed due to
ground subsidence.
If the ground is soft, reinforce it as by driving piles.
(3) The basic weight of the foundation must be from two to four times the fan’s total weight.
(4) Isolate the machine foundation from the pillars / floor of the building so that vibration will not
be transmitted.
(5) In a standard method for the floor-installed type fan, box out holes in the foundation concrete
and fix the anchor bolts into the foundation when installing the fan.
Refer to the external dimensions drawing for the positions of the holes for embedding
anchor bolts.
When anchor bolts are pre-embedded before the fan arrives, the bolts should be carefully
positioned, using a template or other tools.
(6) When installing two or more foundations, isolate each of from others so that vibration will not
be transmitted.
(7) When the fan is used as construction equipment for which the foundation is installed on the
2nd or higher floor, the foundation should be positioned in line with the beams and as close
to the wall of the building as possible.
(8)
3.5 Installation
3.5.1
In the case of ceiling-suspended type
(1) Suspend the fan base horizontally with the hanging bolts, which have been embedded into
the ceiling, in a way that the load of the fan will be evenly supported by all the bolts.
(2) Prepare the hanging bolts having enough strength (both in bolts themselves and in
embedding conditions).
(3) After the installation, lock the nuts of the hanging bolts to prevent them from loosening.
Foundation concrete
Anchor bolt
Ceiling
suspended frame
Double nut