-
Q: Why is a 1/4” single expansion anchor called a 1/4” single
expansion anchor?
A: The 1/4” refers to the diameter of the bolt that goes into the double
expansion anchor. 3/4” single expansion anchor tells you that a 1/4 ”
diameter bolt is used with the anchor.
-
Q: Why is the hole size for a single expansion anchor so large? A 1/2 ”
anchor requires a 7/8” hole?
A: The inside diameter of the anchor is 1/2” allowing a 1/2”
bolt to be screwed into the anchor. The outside diameter of the anchor is
7/8”, the difference between the 1/2” and 7/8” is
the anchor body. All female type anchors are configured like this.
-
Q: How come there are no holding values for these anchors in base materials
other than concrete?
A: Concrete is such that a specific psi can be determined and replicated in real applications. Brick, block, stone and other base materials
can very from one unit to the next.
Q: Why do I need to know the length of the anchor?
A: Because the length of the anchor will determine how deep to drill your hole in the base material.
Q: What other names are these type of anchors called?
A: Single expansion anchor, single expansion shields, keystone single expansion
shield, single wedge machine bolt, single, single thunderloc, SMSA, machine
screw anchor.