The Nortek® Leveler
By Scott Eden, President, Nortek®
Nortek® CopperWorks is proud to introduce the Nortek
Leveler, another Nortek innovation that stands up to the test
of time. The Nortek Leveler has been designed to handle the
load with the person who makes the adjustments in mind. (Fig.
As a log home settles, the load increases on your support
posts. Most of the natural settling occurs in the first few
years, so timely adjustments of the settling jacks are especially
important. If this critical adjustment is neglected, the load
on your settling jacks has increased to an excessive level,
making it difficult or even impossible to adjust the settling
jacks. Often special equipment is brought in to relieve the
load on the settling jack so the adjustment can be made or
to replace the settling jack.
When the time comes to adjust the settling of a log home,
Nortek Levelers unique design features will make your
job hassle free. Take a look and discover the true benefits
of the Nortek Leveler.
Screw Support Base Plate
The end of the screw is welded to a solid steel support
base plate that distributes the load evenly to the joining
members or foundation of the log home. Welding, rather than
threading the screw into the support plate, prevents a failure
of the thin thread cross section in the support plate.
The Nortek Leveler utilizes the ACME thread profile that
was developed for the purpose of producing transverse motion
or transmitting power, as compared to the commonly used Unified
thread or V profile that was designed for fastening or joining.
In general, with the inefficiency of the V thread profile
in transmitting power, the ability of unscrewing is lessened
whereas the reduced thread angles of the ACME profile provide
more efficiency in moving heavy loads.
The ACME thread for the Nortek Leveler is roll formed rather
than machine cut. A roll formed thread provides superior resistance
to galling, stripping or seizing. The rolled thread grain
structure is not severed in any way, but is, instead, reformed
in unbroken lines that follow the thread contours. (fig. 2)
Therefore, for a shear failure to take place, it must occur
across rather than with the grain of the material.
Nortek’s exclusive Spider Nut has a unique shape that
allows for multiple adjusting tool options. The true value
of the Spider Nut’s shape provides an increased surface
area for load distribution onto the bronze bearing and post
load plate. This added surface area prevents galling, binding
and embossing of the post load plate and the adjustable nut,
especially when an excessive load has been applied.
If adjustments to settling jacks are not made in a timely
manner, an increased load occurs on them. If need be, with
the Spider Nut, a punch & sledge can break that initial
load and allow adjustments.
The surface between the Spider Nut and the Post Load Plate
is where the majority of the friction resistance is encountered
when trying to make your adjustment. That is why Nortek provides
a large solid Bronze Bearing to relieve the friction between
the Spider Nut and Post Load Plate. The Bronze Bearing reduces
the friction to less than half compared to the surfaces of
steel to steel.
Post Load Plate
The Post Load Plate is a solid steel plate that distributes
the load evenly to the end of the vertical post. With the
screw support, the screw is retracted into the post and the
screw gains additional support. Should any minor shifting
occur during the construction or natural settling of the log
home, the screw support will help to maintain a solid vertical
orientation. This support also keeps the Levelers threaded
surface moving free and clean from obstruction.
All the features of the Nortek Leveler combine to assure
the post load is safe, secure and easily adjusted in the years
to follow. When installing the Nortek Leveler, contact a structural
engineer for proper sizing, placement and application.
The Nortek Leveler is designed with the homeowner in mind.
They all handle the load but only one has been designed to
handle the adjustment.
For additional information please contact:
Ron Dirkson Design Services
PO BOX 874 STN A,
Nanaimo, BC, Canada, V9R 5N2
Tel: (250) 390-4714