Husqvarna Soff-Cut 4000 Bedienungsanweisung Seite 50

• Shrinkage potential of concrete-cement (type,
quantity), aggregate (size, quantity, quality), water to
cement ratio, admixtures, concrete temperature.
• Base friction.
• Slab restraints.
• Layout of foundations, racks, pits, equipment pad,
trenches, etc.
• Environmental factors - temperature, wind, humidity.
• Methods and quality of concrete curing.
Generally, contraction joint patterns should divide slabs
into approximate square panels per the recommended
spacing shown in the table.
Concrete thickness, mm
(in.)
90 (3.5)
100, 114 (4, 4.5)
125, 140 (5, 5.5)
150 (6) or greater
At all intersecting cross cuts, install Husqvarna joint
protectors at each joint to prevent joint damage. Install
an additional joint protector where the right wheel will
cross the joint to prevent concrete damage.
Maximizing the Soff-Cut system
"The timing of concrete operations - especially finishing
and jointing - is critical... Failure to address this
issue can contribute to undesirable characteristics in
the wearing surface as cracking..." (Extract from the
foreword of the American Concrete Institute (ACI) 302.1
R-96.)
The Soff-Cut Ultra Early Entry system has revolutionized
the method used to control random cracking.
In order for an operator to do a satisfactory job using the
Soff-Cut system, the following criteria must be met:
• A Soff-Cut Ultra Early Entry dry up-cut saw.
• A Husqvarna Soff-Cut dry-cutting diamond blade.
• A Husqvarna anti-ravel skid plate installed with every
new diamond blade.
• An operator skilled in using the Soff-Cut Ultra Early
Entry cutting system.
Without this, joints can not be cut clearly enough to
control random cracking before it starts, which is what
the building owner is paying for.
The ACI Spec 302.1R-96 says it best:
"Early-entry dry-cut saws use diamond-impregnated
blades and a skid plate that helps prevent spalling.
Timely changing of skid plates is necessary to effectively
control spalling. It is best to change skid plates in
accordance with manufacturer's recommendations...The
goal of saw-cutting is to create a weakened plane
as soon as the joint can be cut...The timing of the
50
Maximum spacing, m (ft.)
2.4 (8)
3.0 (10)
3.6 (12)
4.5 (15)
early-entry process allows joints to be in place prior
to development of significant tensile stress in the
concrete..."
The Portland Cement Association (PCA) engineering
bulletin, Concrete Floors on the ground, also states:
"Proper jointing can eliminate unsightly random cracks.
Aspects of joining that lead to a good job are choosing
the correct type of joint for each location, establishing
a good joint pattern and layout, and installing the
joint at the correct time... Timing of joint sawing is
critical...Lightweight, high-speed, early-cut saws have
been developed to permit the joint sawing very soon
after floor finishing, sometimes within 0 to 2 hours...if the
cut is sawn within a few hours after the final finishing,
random cracking can be controlled..."
Husqvarna has the only Ultra Early Entry dry-cutting
system (Soff-Cut) which controls random cracking
through the early timing of the cut. With the Soff-Cut
method, control joints are usually cut within 2 hours after
the finishing process.
Joint cutting should begin as soon as the concrete will
support the weight of the saw and the operator at each
joint location and before final set.
If the joints are not being cut within this time frame
then the Soff-Cut Ultra Early Entry method is not being
followed.
Before you operate the product
1. Do daily maintenance. Refer to
56 .
2. Make sure that the front guide is turned to the
forward position.
3. Fill the oil tank. Refer to
for information about recommended engine oil.
4. Do a check of the oil level. Refer to
engine oil level on page 60 .
To fill fuel
WARNING:
you are in a vehicle. Risk of fire. Put the
container on the ground away from your
vehicle.
CAUTION:
octane number less than 90 RON (87 AKI).
This can cause damage to the product.
CAUTION:
not use unleaded gasoline with more than
10% ethanol. Gasoline with more than 10%
ethanol cause a risk of fire and can also
cause starting and performance problems.
It can also cause damage to metal, rubber,
and plastic parts of the fuel system.
Introduction on page
Technical data on page 70
To examine the
Do not fill containers when
Do not use gasoline with an
Use unleaded gasoline. Do
794 - 001 - 19.04.2022