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Technical Information:
A
Drop-In anchor consists of a zinc plated steel tubular expansion
shield and a solid, cone-shaped expander plug. The expander
plug is case hardened and tempered to prevent galling and binding
during expansion. The shield has four equally spaced slots for
a portion of its length, the bottom part may be knurled. The
shield also has a smooth, flangeless top that allows either
flush or countersunk installation. the bottom lip of the shield
is tapered to allow maximum depth and holding power.
Drop-In concrete anchor/fastener -
Approvals:
Specification FF-S-325 Group Vlll, type 1. Applications:
Medium duty into concrete.
Drop-In concrete anchor/fastener - Installation:
(1) Drill hole into concrete with a carbide
tipped masonry drill bit conforming to ANSI B94, 12-77, matching
the bit size with the outside diameter of the drop-in anchor
being used. Make sure hole depth exceeds minimum embedment.
(2) Clean out concrete dust from hole using a wire brush, compressed
air or a blow out bulb. (3) Drive anchor into hole flush with
the surface of the concrete. (4) Using the proper setting tool
for the anchor, expand anchor by inserting the setting tool
into the anchor and set with several solid hammer blows. The
anchor is set properly when shoulder of setting tool is flush
with the top of anchor. To set anchor below surface: Drill hole deeper than anchor length. Thread bolt into anchor.
Hammer anchor into hole until bolt head is a desired depth.
Remove bolt and set anchor with setting tool as described above.
Drop-In concrete anchor/fastener -
Anchor Spacing:
The forces on a Drop-In Anchor are transferred
to the material that it is installed in. If the anchors are
installed too close together, it can cause an interaction of
the forces, thus reducing the holding power of the anchor. As
a rule of thumb, the expansion industry has established a minimum
standard of ten (10) anchor diameters for spacing between anchors
and five (5) anchor diameters from an unsupported edge. When
vibration or sudden impact are part of the load condition, spacing
between anchors should be increased.
Drop-In concrete anchor/fastener -
Bolt Length:
Bolt length equals thread length of anchor plus
thickness of material to be fastened.
Drop-In concrete anchor/fastener -
Technical Data
| Size |
Length |
Drill Bit |
Thrd. Length |
Bolt Dia. |
Pull-Out |
| 1/4" |
1" |
3/8" |
7/16" |
1/4" |
2300 lb. |
| 3/8" |
1-9/16" |
1/2" |
5/8" |
3/8" |
4100 lb. |
| 1/2" |
2" |
5/8" |
1-3/16" |
1/2" |
6000 lb. |
| 5/8" |
2-1/2" |
7/8" |
1-3/16" |
5/8" |
8300 lb. |
| 3/4" |
3-3/16" |
1" |
1-3/16" |
3/4" |
13600 lb. |
Values shown are average ultimate values and are offered only
as a guide and are not guaranteed. A safety factor of 4:1 or
25% is generally accepted as a safe working load. Reference
should be made to applicable codes for the specific working
ratio. Minimum embedment for satisfactory anchor performance
is 4-1/2 bolt diameters. Deeper embedments will yield higher
tension and shear capacity.
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