Marshalltown SG87SH SURFACE SHARK Floor Grinder - Manual (Page 28)

PAGE 28 SG87Sh SuRFACE ShARK FLooR GRINDER
The TR 34 Tolerances for Defined Traffic Floors.
The TR 34 System divides defined traffic floors into
three categories:
a) Superflat
b) Category 1
c) Category 2
For each category, the TR 34 System specifies limits
for three properties:
Property 1 is the difference in elevation between two
points 12 inches apart, measured in the direction of
vehicle traffic. This is the levelness tolerance.
Property 2 is the difference in slope over 24 inches
measured in the direction of vehicle traffic. This is
the flatness tolerance. It is identical as the 24 inch
curvature utilized in the F number system.
Property 3 is the difference in elevation between
opposite points in the left and right wheel path,
measured perpendicular to the direction of vehicle
traffic. As with Property 1, it is a levelness tolerance.
The TR 34 System specifies different values for
Property 3 depending upon whether the distance
between left and right wheel paths is more or less than
5 nominal feet.
The Superflat category is intended for very narrow
aisle warehouses where the highest standards are
required. Category 1 is suggested for very narrow aisle
warehouses where the vertical lift height is between
26 and 43 feet. Category 2 is for very narrow aisle
warehouses where the vertical lift height is under 26
feet and the use of low rise, automatically controlled
vehicles. No matter which category of surface regularity
is specified, it is accomplished by measuring elevations
on 12 inch centers. This is very similar to an F number
survey, but with an important distinction. In an F
number survey, the elevation profiles are made on the
floor at random. With the TR 34 System, the survey
measurements are made on the actual paths of the
vehicles that will utilize the floor.
Improving the Wear Resistance of Concrete Floors
by Grinding with the Floor Grinder.
Poor wear resistance can often be traced back to a
surface that is weaker than underlying levels of the
pour. This occurrence can result from bad finishing
techniques, improper curing or early freezing.
Where surface weakness is a problem, grinding can
be a solution. The process is similar to the early age
technique. The grinding depth is typically 1/16 to 1/8
inch. A large project should not be attempted until
a small test area has proven that the technique will
produce the desired results. usually only a square
yard of floor is ground with the normal wear tests
performed.
Repair costs can be minimized by grinding only those
floor areas that accommodate traffic. For example, in
a pallet rack warehouse, it may be necessary to grind
only the aisle areas and not under any of the racks.
The grinding process can adversely affect the surface
regularity. Where specific properties are important,
it may be necessary to survey the floor during the
grinding process to ensure that flatness and levelness
specifications are maintained.
Cleaning Concrete Floors to Improve the Wear
Resistance with Floor Grinder.
Clean concrete floors have a longer service life than
dirty, poorly maintained floors. Loose debris produces
three-bodied wear by allowing particles to roll between
the traffic and the floor surface. With some types of
debris, especially when lodged in vehicle wheels, wear
can be immediate and severe.
The Floor Grinder can be utilized with a number
of multi accessories to clean and extend concrete
floor service life. The ShARK TooTh floor coatings
removal system readily removes food, oil and rubber
accumulations from high traffic floor areas.