5 P3500
Use of a powder actuated system is not recommended if the following occurs during the center
punch test:
1. The fastener point has been blunted. This indicates that the base material is too hard.
2. The base material cracks or shatters. This indicates that the base material is too brittle.
3. When using an average hammer blow, the fastener penetrates the base material easily. This
indicates that the base material is too soft.
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 material. 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 TYPICAL BASE MATERIAL PENETRATION
Soft Masonry Concrete block 1" -1-1/4"
Average concrete Poured concrete 3/4" - 1"
Dense concrete Pre-stressed/pre-cast concrete 5/8" - 3/4"
EDGE DISTANCE
Do not fasten closer than 3" from the edge of concrete. If the concrete cracks, the fastener may
not hold. Closer edge distances for applications such as sill plates may be permitted 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 recommended 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.) MAXIMUM TORQUE FOR 3/8" STUD (FT.-LBS.)
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MODEL P3500 CAT. NO.52000/Deluxe Kit 52001/Blister Pack
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