Resources

MASON Drop-In Anchors

  • Medium duty fastening with bolts or threaded rods
  • Reliable setting with simple hammer set expansion plug
  • Fire resistance
  • Shallow embedment
  • Economical anchor for everyday jobsite fixings
  • Durable and versatile

 

 

Setting Procedures

Drill a hole of required diameter and depth.

 

Clean the drilled hole.

 

Drive anchor into the drilled hole and expand the plug with the setting punch.

 

Insert threaded stud or bolt and tighten to required torque.

 

Selection Chart

 

Setting Parameters

 

Basic Loading Data for Single Anchor in Concrete

  • Non-cracked concrete C20/25, = 25N/mm2
  • Correct setting
  • No spacing and edge distance influence

 

Tensile Resistance

 

Shear Resistance

 

Tensile – Concrete Capacity CC Design Method

 

Design Pull-out Resistance,

 

Design Concrete Cone Resistance,

Design Splitting Resistance,

 

 

Design Steel Resistance,

 

Influencing Factors

Influence of Concrete Strength

Influence of Edge Distance*

* The above influencing factors must apply for every edge distance smaller than critical edge distance . Actual edge distance shall not be smaller than minimum edge distance

Influence of Anchor Spacing**

** The above influencing factors must apply for every anchor spacing smaller than critical spacing distance . Actual anchor spacing distance shall not be smaller than minimum spacing distance .

 

SHEAR – Concrete Capacity CC Design Method

Design shear resistance

 

Design Concrete Edge Resistance,

 

Design Concrete Pryout Resistance,

 

Design Steel Resistance,  

 

Influencing Factors

Influence of Concrete Strength

 

Influence of Edge Distance*

* The above influencing factors must apply for every edge distance smaller than critical edge distance . Actual edge distance shall not be smaller than minimum edge distance

 

Influence of Anchor Spacing**

** The above influencing factors must apply for every anchor spacing smaller than critical spacing distance . Actual anchor spacing distance shall not be smaller than minimum spacing distance .

 

Influence of Shear Loading Angle

 

Influence of anchoring spacing and edge distance for concrete edge resistance

Formula for single-anchor fastening influenced only by edge

For single anchor

Formula for two-anchor fastening valid for S<3c

General formula for n-anchor fastening (edge plus n-1 spacing) only valid where to are all < 3c and >1.5c

Note: It is assumed that only the row of anchors closed to the free concrete edge carries the centric shear load.

For 2 anchors

COMBINED LOAD – Tension and Shear