Why A Power Fastener Holds - Remington 493 Mode D'emploi

Why A Power Fastener Holds

WHY A POWER FASTENER HOLDS IN CONCRETE
The compression bond of the concrete to the power
fastener accounts for the majority of the holding power.
The power fastener displaces the concrete which tries to
return to its original form causing a squeezing effect.
Maximum holding power is achieved when the depth of
penetration produces a bond on the power fastener equal
to the strength of the concrete. As a general rule, penetra-
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tion should be approximately 1" to 1 / " into the base
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concrete. Make sure the concrete is at least three times as
thick as the intended power fastener penetration. NEVER
have the power fastener point protrude through the concrete.
NOTE: Concrete needs to cure for 28 days before maximum fastening holding power
will be achieved.
WHY A POWER FASTENER HOLDS IN STEEL
Holding power in steel depends on the elasticity of the
steel. The steel pushes back on the shank of the power
fastener.
Drop a marble into water; the water parts, the marble
continues down, the water closes back. This is similar to
the reaction when a power fastener penetrates steel.
In steel, the point of the power fastener must penetrate
completely through for highest holding power. If the
power fastener does not penetrate, the spring action of
the steel pushes back on the point and tends to force the
power fastener out.
Recommended applications are between 3/16-3/8" steel.
NOTE: When fastening in steel be sure the point goes through the steel.
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