Lipped Drop-In Anchor (DIAL)– Simpson Strong-Tie Anchor Systems
The lipped drop-in anchor is a drop-in anchor that has a lip
around the anchor body at the internally threaded end. The lip allows
for the drop-in anchor
to be set flush with the surface of the concrete without having to
precisely drill the depth of each hole. The flush mounting of the
lipped drop-in anchor allows for consistent embedment in the concrete
creating uniform threaded rod lengths.
Specifications of Material
The lipped drop-in anchor is available in zinc plated carbon
steel. The steel of the anchor meets a minimum 70,000 psi tensile
strength and the expander plug meets a minimum of 50,000 psi tensile
strength. Both the anchor body and the expander plug are zinc plated.
Criteria for Testing
In accordance with the ICC-ES’s expansion anchor criteria (AC01)
for wind and seismic loads, combination loads for shear and tension as
well as minimum edge and spacing distance have been tested for the
Simpson Strong-Tie lipped drop-in
Lipped Drop-In Anchor (DIAL) Code and Specifications
Federal Specifications A-A-55614, Type 1, City of Los Angles
RR24682, Underwriters Laboratories EX3605 and Factory Mutual Report
number 3017082 are met.
Lipped Drop-in Anchor Diameters
The Simpson Anchor Systems lipped drop-in anchor is only
available in three diameters. Unlike the standard zinc plated drop-in
anchor, it does not come in either the 5/8” or 3/4” diameters. The
anchor is available in the 1/4” diameter, the 3/8” diameter, and the 1/2” diameter.
Lipped Drop-In Anchor Lengths
Each diameter of the lipped drop-in
anchor has only one length and is not available in multi
lengths. The 1/4” lipped drop-in anchor is 1” long, the 3/8” lipped
drop-in anchor is 1-1/2” long and the 1/2 ” lipped drop-in anchor is 2”
Diameter of Threads
The lipped drop-in anchor size refers to the inside diameter of
the anchor or the thread size of the bolt or threaded rod that can be
inserted into the lipped drop-in anchor. The threads of the lipped
drop-in anchor are national coarse threads, measured by the number of
threads per inch. The 1/4” has 20 threads per inch and is commonly
referred to as 1/4 – 20, the 3/8” has 16 threads per inch and is
referred to as 3/8 –16 and the 1/2” has 13 threads per inch and is
referred to as 1/2 – 13.
Hole Size for Lipped Drop-in Anchors
The hole size is equal to the outside diameter of the lipped
drop-in anchor. The lipped drop-in anchor is designated by the diameter
of the internal threads. The outside diameter is larger and the hole
must be drilled to accommodate the outside diameter of the lipped
drop-in anchor. For the correct diameter of hole to be drilled for each
diameter of lipped drop in anchor, refer to the chart below. It is
critical that the hole tolerance meets the hole tolerance requirements
of the lipped drop-in anchor which is obtained by using a hammer drill
and a carbide bit meeting ANSI standards. Oversized holes will make it
difficult to set the lipped drop-in anchor and the load capacity of the
anchor will be reduced.
Depth of Embedment
The lipped drop-in anchor is designed to sit flush with the
surface of the concrete, insuring the same embedment depth for each
anchor installed. During installation make sure that the lipped drop-in
anchor is flush with the concrete surface in order to meet the
embedment depth requirements.
Installation Tools for Simpson Drop-in Anchors
Each lipped drop-in
anchor diameter requires a specific setting tool to be used to
expand the anchor in the concrete base material. Each diameter of
lipped drop-in anchor has a designated setting tool that matches the
diameter of the lipped drop-in anchor. For the lipped drop-in anchor to
be set properly, the shoulder of the setting tool must touch the lip of
the drop-in anchor.
Lipped Drop-In Anchor Installation Instructions
1. Drill the correct diameter hole for the lipped drop-in anchor
being installed in the concrete with carbide bit meeting ANSI standards
using a hammer drill. The depth of hole must be a minimum of the anchor
length being used plus 1/8”.
2. With compressed air, clean out the hole of all dust debris.
3. Insert lipped drop-in anchor into the hole in the concrete with
the threaded end of the lipped drop-in anchor closest to the surface.
Tap lightly with a hammer until the lipped drop-in anchor is flush with
the surface of the concrete.
4. Place the correct setting tool for the diameter of lipped
drop-in anchor into the threaded portion of the anchor. Hit the setting
tool with a hammer until the lip of the anchor meets the lip of the
Lipped Drop-In Anchor (DIAL) Product Information
Lipped Drop-In Diameter
Carbide Drill Bit Diameter
Lipped Drop-In Part #
Anchor Body Length
Quantity Per Box
As with any anchoring project, it is important to keep safety in mind and follow instructions carefully. Always remember to wear safety goggles, handle all tools with extra care and follow all technical specifications. This article is meant to serve only as a basic explanation of concrete fasteners. Always refer to manufacturer's instructions or consult a contracting expert during any anchoring project.
Article Written By:
Michael Pistorino, Vice-President Operations
Concrete Fasteners, Inc. has over 40 years of experience selling concrete fasteners. We can ship out one box or a whole pallet of concrete anchors. Our products are of the highest quality... "your satisfaction is guaranteed". We ship all orders the same day the order is received.