Remington R300 User Manual download pdf (Page 12)

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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 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 pen-

etration produces a bond on the power fastener equal to the

strength of the concrete. As a general rule, penetration should

be approximately 1" to 1

/4" into the base concrete. Make sure

the concrete is at least three times as thick as the intended

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 com-

pletely through for highest holding power. If the fastener does

not penetrate, the spring action of the steel pushes back on the

point and tends to force the 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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Remington R300 User Manual Page 12