TECHNICAL DESIGN
and installation
GUIDE
THE COMPLETE ENGINEERED SOLUTION for
temporary movement joints
CONTENTS
INTRODUCING SURELOKTM
APPLICATIONS
COMPONENTS
PERFORMANCE
REINFORCEMENT
INSTALLATION
EDGE DISTANCE AND SPACING
DIMENSIONS
ONGOING DEVELOPMENTS
02
04
04
05
05
06
07
07
07
INTRODUCING
SURELOKtm
SureLokTM is a revolutionary engineered solution to
temporary movement joints (TMJ).
SureLokTM has been specifically designed to eliminate
issues that current TMJ market options present.
SureLokTM is the result of years of
experience, investment, research,
development and testing. It has been
developed for the post-tensioning,
construction and mining industries
with a patent pending in Australia
and Internationally.
SureLokTM is revolutionary as it
offers a range of safety, cost, design
and performance benefits. It is a
world-class leader in the industry
as it is the first of its kind to provide
temporary movement while at the
same time remain completely sealed
as it achieves its shear capacity.
Temporary Movement Joints (TMJ)
are the most complex joint as they
require temporary free movement
in two horizontal directions prior to
being locked tight for permanent
stability and integrity of a structure.
The solution required a combination
of specialist areas of engineering
outside of the standard field of
02
SURELOK TECHNICAL DESIGN GUIDE
structural engineering, using
hydraulic engineering to design a
movable pressure seal as well as
unfamiliar materials such as rubber
and plastics to ensure affordability.
The solution “SureLok” engineers
an intelligent void with a pressure
sealed system bridging the
joint whilst allowing horizontal
movement before being locked
together with a typical cement
grout mixture used for posttensioned tendons. The intelligent
void ensures the dowel contains
cover for durability and fire within
the sleeve across the joint without
having the rely of the joint itself
being sealed or grouted. During
the 3 years of development there
were 12 prototype phases tested
against the rigorous design and site
criteria. In addition, the product has
also been tested at the University
of Technology Sydney (UTS). We
are extremely pleased and proud
to have finally resolved the past
long standing issues of temporary
movement joint performance, whilst
utilising materials such as plastics,
rubber and mild steel to ensure the
product is financially feasible and
available to all.
You can now have peace of mind
knowing that SureLokTM is the
tested and proven solution to
temporary movement joints and is
the answer to all of your TMJ needs
and requirements.
ENSURES A LOW COST, ECONOMICAL, TECHNICAL AND
PRACTICAL SOLUTION.
ENSURES A FULLY SEALED SYSTEM.
ENSURES A FULLY GROUTED SYSTEM FOR PERMANENT
LOCKING.
ENSURES REDUCED SITE INSTALL TIME.
ENSURES VERTICAL SHEAR CAPACITY WITHOUT CORBELS.
ENSURES ALL DESIGN AND SAFETY CRITERIA REQUIREMENTS
ARE MET.
ELIMINATES JOINT SEALING FOR PURPOSES OF GROUTING,
CORBELS, PROPPING AND DRILLING EDGE FORM FOR DOWEL.
AN INNOVATIVE ADVANCEMENT FROM ALL CURRENT MARKET
OPTIONS.
SURELOK TECHNICAL DESIGN GUIDE
03
APPLICATIONS

NO MORE POUR STRIPS

NO MORE CORBELS

NO MORE UNRELIABILITY

NO MORE MESS


TENSION ONLY APPLICATION
TENSION AND SHEAR APPLICATION
SLAB OR BEAM TO CORBEL
SLAB TO SLAB
components
POUR 2 - Sleeve Connector
& Dowel
POUR 1 - Main Sleeve
& Grout Tubes
SURELOK - ASSEMBLED VIEW
N24 Dowel Bar - 1000mm long
Grout Tube
PT Chair
Grout Tube
Sleeve (Main Body)
Rubber Boot Seal
Flange
Sponge Seal
SURELOK - EXPLODED VIEW
04
SURELOK TECHNICAL DESIGN GUIDE
performance
SLAB THICKNESS
(MM)
TENSION ALONG
LINE OF DOWEL
VERTICAL SHEAR CAPACITY (kN) FOR VARIOUS JOINT WIDTHS
160
40
10
10
8
8
180
60
20
17.5
15
12.5
200
80
30
25
20
15
220
100
40
35
25
20
240
100
50
45
35
25
260+
100
60
55
45
35
5MM
10MM
15MM
20MM
Note 1: FOS of 1.7 used for the above shear capacities
Note 2: The above capacities are based on 32Mpa concrete surrounding sleeve and 40Mpa grout within the sleeve
Note 3: SureLok cover to dowel is 20mm for the N24 dowel bar (with 40Mpa grout)
Note 4: Requires additional reinforcement for punching shear as shown over page
Joint Filler for Fire - Integrity (AS3600 2009 5.2.8)
Reinforcement
Refobar can recommend a number of suitable joint fillers
to resist the passage of flames or hot gases through the
joint should the building design specification require it.
We note the Surelok sleeve and N24 dowel bar contains
its own protection system across the joint via the 20mm
of 40Mpa grout supporting the dowel bar to ensure its
structural adequacy and durability
All capacities derived above have been based on zero local
reinforcement and only typical edge reinforcement of N12300 J-Bars. However, we recommend each SureLok unit
has local reinforcement as per the details over page for
local dowel punching capacity assurance to enhance the
FOS even further from 1.7 to 2.0.
REINFORCEMENT
Each SureLok unit requires local reinforcement to ensure adequate performance capacity is achieved. Each
SureLok unit requires 2 N12 U-Bars each side of the joint as shown below. Reinforcement must be detailed
in accordance with relevant codes and the details shown below. Lacer bars can form part of the main edge
reinforcement.
2 N12 U-Bars
2 N12 U-Bars
Lacer Bars
100mm
TOP VIEW
U-Bars
SIDE VIEW
SURELOK TECHNICAL DESIGN GUIDE
05
POUR 2
POUR 1
INSTALLATION
1. Nail sleeve to edge form and chair end
2. Connect grout tubes (Option 1)
3. Connect grout tubes (Option 2)
4. Install reinforcement and concrete POUR 1
1. Pull off protective sticker
2. Install SureLok connector
3. Install N24 dowel bar and reinforcement
4. Concrete POUR 2 and grout sleeve later
Notes:
1. Grout tubes can link or connect maximum 10 units together for grouting
2. Grouting must be carried out under low pressure
3. Each SureLok unit must utilise the 2 grout ports, one port as an inlet and the other as an outlet so as grout
flows from one end of the unit to the other. Grout can flow in any direction along the SureLok unit.
4.Grout mix must achieve 40Mpa to ensure the full tension capacity is achieved
06
SURELOK TECHNICAL DESIGN GUIDE
EDGE DISTANCE AND SPACING
To utilise the full capacity of each unit, the following minimum spacing rules apply.
h
Min. 0.75h
Min. 1.5h
DIMENSIONS
140
130
80
90
30
65
30 45
80
480
ongoing developments
The Slab-to-Wall option is currently in university laboratories completing its testing phase and will be available
soon. Having both the Slab-to-Slab and Slab-to-Wall options will complete the full temporary movement joint
range.
SURELOK TECHNICAL DESIGN GUIDE
07
PRODUCT
INFORMATION
PACK
Contact us today to receive a complimentary SureLokTM
Product and Information pack which includes:
•
SureLokTM Product
•
Product Information Sheet
•
Technical Specification
Contact
Lance Rogers
Product Development Manager
E: [email protected]
Issue March 2015
M: 0408 874 737
Get to know us at refobar.com.au
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CALL
1300 775 477
+61 7 3888 6655