Prime T1000 Operating Instructions Manual page 5

FASTENER INSTALLATION REQUIREMENTS
It is important to understand the required minimum base material thickness requirements along with the
minimum spacing and edge distance requirements. Failure to follow these requirements can result in an
unsuccessful fastening and create a safety hazard.
BASE MATERIAL THICKNESS
Concrete base material should be at least three (3) times as thick as the fastener embedment penetration.
If the concrete is too thin, the compressive forces forming at the fasteners point can cause the free face of
the concrete to break away. This can create a dangerous condition from flying concrete and/or the fastener
and also results in a reduction of fastener holding power. For applications in the face shell of concrete
masonry block, select a fastener length which will not exceed the thickness of the face shell.
FASTENER PENETRATION GUIDE
The following table lists typical embedment or penetration depths expected in the
base materials listed. The penetration will vary depending on the density of the materi-
al. This table should be used as a guide since the consistency of these materials varies.
When in doubt, a job site performance test should be conducted.
DENSITY
Soft Masonry
Average concrete
Dense concrete
EDGE DISTANCE
Do not fasten closer than 3" from the edge of concrete. If the concrete cracks, the fas-
tener may not hold. Closer edge distances for applications such as sill plates may be per-
mitted if specific fastener testing has been conducted.
SPACING
Setting fasteners too close together in concrete or masonry can cause cracking. The
recommended minimum distance between fasteners is 3" center to center.
FASTENER LENGTH SELECTION IN CONCRETE
For permanent applications using pins in concrete, first determine the thickness of the fixture to be fastened.
To this, add the required embedment or penetration into the base material. This will be the fastener shank
length required. For applications in the face shell of masonry block, select a fastener
length which will not exceed the thickness of the face shell.
For removable applications with threaded studs, the shank length required is equal to
the embedment depth required. To determine the minimum threaded length, add the
thickness of the fixture and the nut / washer thickness. The nut and washer thickness is
equal to the nominal thread diameter. Do not over tighten threaded parts. Maximum
tightening torque values are listed in the table below. Use of a nut setter is recom-
mended to reduce the possibility of over tightening the fasteners. For critical applications,
perform a job site test.
MAXIMUM TORQUE FOR 1/4" STUD (FT.-LBS.)
2
TYPICAL BASE MATERIAL
Concrete block
Poured concrete
Pre-stressed/pre-cast concrete
MAXIMUM TORQUE FOR 3/8" STUD (FT.-LBS.)
PENETRATION
1" - 1-1/4"
3/4" - 1"
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5/8" - 3/4"
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Penetration
3x
Penetration
3"
3"
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Fixture
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Embedment
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Thread Length
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Embedment
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