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GENERAL ANCHORING GUIDELINES
The most critical factors in choosing the auxiliary anchors to be used in conjunction with
the thru-bolt or cast-in-place anchors is the wall material matched with the appropriate
style and size of anchor, with the size referring to both diameter and embedment depth.
The following are general guidelines only, and do not necessarily constitute what is correct
for your specific project.
The embedment depth of the anchor is defined as the face of the wall (not including the
wood pad) to the bottom of the anchor. Refer to the anchor manufacturer’s specifications
for the correct embedment depth for the approximate load and appropriate safety factor on
the anchor, and thickness of the wall to which it is being attached. A general rule for em-
bedment depth is the wall thickness (for concrete tilt-up panels or concrete block with solid
grout fill) should be 125% of the anchor embedment. For example, on a 5” concrete tilt-up
panel, the embedment can be up to 4” deep. Increasing the embedment will also increase
the occurrence of the concrete panel to spall at the anchor location, reducing the effective-
ness of the anchor.
The edge distance of the anchor to an opening (window, doorway, top of wall, etc.) is also
a critical factor. Again, refer to the anchor manufacturer for minimum edge distance per
type of anchor and embedment depth chosen. A general guideline on backstop installa-
tions is to maintain a minimum 9” edge distance.
Clearance holes for anchors will be provided by the manufacturer. A general guideline for
anchors under 1” is diameter is to drill the hole 1/16” oversized from the anchor diameter.
Wire brush the hole, and clean out the compressed air before inserting the anchor.
Application examples that follow are advisory only. Porter is not responsible for claims or
damage arising from not properly selecting and installing anchors for your specific project.
These anchors must be used in conjunction with a positive thru-bolt application, as
previously described.
Concrete or Solid Fill-Block Wall
: Wedge-type anchor, minimum 1/2” diameter.
Double or four-way expansion shield anchors are suitable for this application.
Mortar Joint (or concrete) Wall
: Lag shield anchors. When installing in a mortar
joint, make certain the anchor expands against the block, and not to the open cell.
Adhesive Anchors for either Hollow CMU Blocks or Concrete
: The hollow CMU
will require a different adhesive anchor than one for a concrete wall. These anchors
also have a limited shelf life, se be certain to check the expiration date.
Summary of Contents for 219 Series
Page 49: ...INSTALLER NOTES...
