Purchase Concrete Lag Shield Anchors
Technical Information:
This
two-part expansion shield is preassembled into a self-contained
single unit. The shell-like unit has tapered internal threads
for a portion of its length. The outside of the anchor has a
series of circumferential ribs starting at the bottom and running
for a major portion of its length. The back end of the anchor
has two equally spaced ribs that protrude beyond its diameter
and run for a portion of its length. Precision internal threads
permit easy turning of the lag screw without lubrication. Once
fastened, an object may be easily unbolted and removed. All
parts of the completed unit are made of zinc alloy commonly
known as Zamak, a rust-proof material. The anchor comes in
two lengths, short or long. The short lag shield is for anchoring
in high grade concrete or where thickness of base material prohibits
the use of a longer length shield. The long Lag shield is for
use in lower grade base material or where extra anchoring strength
is required.
Lag Shield Anchor concrete anchor/fastener -
Approvals:
Meets G.S.A. Specification FF-S-325C, Group 2, Type 1, Class
1 & 2C
Lag Shield Anchor concrete anchor/fastener -
Applications:
Light to medium-duty into concrete, brick and block.
Lag Shield Anchor concrete anchor/fastener -
Installation:
- Using a hammer drill and a carbide-tipped masonry bit, drill a hole of recommended diameter into the base material. The hole depth should be equal to the length of the lag shield anchor plus one half inch (1/2") or more.
- Clear the hole of all debris.
- Place the lag shield anchor, ribbed end first, into the hole. Tap the lag shield with a hammer until it is flush with the surface of the base material.
- Position the fixture to be fastened over the shield in the base material, insert the lag bolt through the fixture and into the shield, and tighten.
NOTE: If the lag screw begins to torque-up or tighten before the head of the lag screw mates up against the object being fastened, the shield should be driven deeper into the hole by hand hammering the head of the lag screw until flush to the object being fastened. Re-tighten the lag screw to complete the expansion of the shield and to secure the material being fastened.
Lag Shield Anchor concrete anchor/fastener -
Screw Length:
The length of the lag screw required is equal to the thickness of the material to be fastened, plus the length of the lag
shield, plus 1/2".
Lag Shield Anchor concrete anchor/fastener -
Anchor Spacing:
The forces on a Lag Shield anchor are transferred
to the base material in which it is installed. If the anchors are
installed too close together, it can cause an interaction
of the forces, thus reducing the holding power of the anchors.
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 anchor spacing should be increased.
Lag Shield Anchor concrete anchor/fastener -
Technical Data
| |
3000 psi |
| Anchor Size |
Hole Size |
Anchor Length |
Pull Out |
| 1/4" Short |
1/2" |
1" |
550 lb. |
| 5/16" Short |
1/2" |
1-1/4" |
968 lb. |
| 3/8" Short |
5/8" |
1-3/4" |
1408 lb. |
| 1/2" Short |
3/4" |
2" |
2728 lb. |
| 5/8" Short |
7/8" |
2" |
2816 lb. |
| 3/4" Short |
1" |
2" |
3608 lb. |
| 1/4" Long |
1/2" |
1-1/2" |
682 lb. |
| 5/16" Long |
1/2" |
1-3/4" |
1364 lb. |
| 3/8" Long |
5/8" |
2-7/16" |
2420 lb. |
| 1/2" Long |
3/4" |
3-1/2" |
3674 lb. |
| 5/8" Long |
7/8" |
3-1/2" |
3806 lb. |
| 3/4" Long |
1" |
3-1/2" |
4444 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.