High-tensile fastener for structural timber connections The HECO-TOPIX-CC opens up a whole new world for screw connections within modern methods of timber construction. TOPIX CombiConnect was developed as a timber fastener for the transmission of high tensile and compressive forces in structural timber construction applications, which features two major advantages:
The screw is composed of two threads with different pitches, which have the effect of pulling the two components together.
The combination of HECO-TOPIX point and cheese head design facilitates extremely tight spacing without splitting the wood
The HECO-TOPIX-CC can be used both purely as a fastener in new builds and also for strengthening existing timber constructions.
Innovative and powerful – the new HECO-TOPIX-CC
The advantages at a glance
High tensile and compressive forces transmitted via the CC thread
Draws the elements together while being inserted
Universal application possibilities in new builds and in renovations
The HECO-TOPIX tip ensures easy insertion without splitting
Quick insertion thanks to optimised thread pitches
The cheese head design facilitates countersinking without splitting, even with tight spacing, and permits concealed installation
With tried and tested T-drive system
Comes with European Technical Approval ETA-12/0132
Reinforcement of weak points in the cross section of classic timber joints
Creating rafter-purlin joints
Transmission of considerable compressive forces
Creating trussed timber beam ceilings
Fastening of arris fillets to absorb shear loads in on-rafter insulation in combination with HECO-TOPIX-Therm (with no demands on the compressive stress of the insulation), certificate via the HECO calculation software HCS
Rational working procedures – industrial production – modern timber construction! In recent years, many advances have
been made in connection with the simple butt joint in combi-nation with steel components.
Whether dowel joints or the classic joist hanger – although they are appropriate construction elements, they are
unfortunately very time-consuming in their execution. With the HECO-TOPIX®-CC screw transverse butt joints couldn’t
be easier and faster. Added to this, the screws not only take up the shearing force of the beam structure but they also
bear the transverse pull of the structure.
Advantages
Higher degree of load transmission, No protrusion of plate heads or rosettes on the framework level of the rafter surface.
Fast, cost-saving working procedures, easy to disassemble at any time.
Fasteners not visible High fire resistance Approved and certified product (Z.9.1-665)
Simple dimensioning with HCS (HECO-Calculation-Software)
2. Rafter-purlin joints
In addition to the previousHECO-TOPIX® range, a large proportion of the rafter-purlin joints in areas of increased loads can be made with the HECO-TOPIX®-CC, thus rendering additional steel components or corresponding design solutions unnecessary.These joints are particularly suitable for preventing pullout (lifting loads) in the load ranges between 5 kN and 7.8 kN.
3. Reinforcement of weak points in the cross section of classic timber joints
Traditional carpenter’s joints are susceptible to considerable cross sectional weaknesses. Whether tenon joints, dovetail joints or common halvings – the cross section of these joints can be reduced without decreasing the load bearing capacity (see transverse butt joints).
Nevertheless, if a traditional joint is still required, you have the option of using simple tenon joints to accept the transverse pull!
4. Doubling up of weak wooden beams
The entire construction sector is attaching more and more importance to building in existing stock. Nevertheless,
reducing costs is still of the utmost priority. Existing timber-work is often well preserved in the building structures but not
adequately dimensioned for focused load application of the new structure. Previously, the only option in such cases was
the removal of the weak timber beam.
The new HECO-TOPIX®-CC provides a much simpler solution:
Simply double up your supporting beam to the required cross section. The HECO-TOPIX®-CC provides the necessary
reinforcement of the new cross section.
Advantages;
Higher load acceptance from the supporting structure.
Fast, cost-saving work procedures.
No removal of existing building stock.
Fasteners not visible.
High fire resistance.
Approved and certified product (Z.9.1-665).
Simple dimensioning with HCS (Heco Calculation Software).
5. Reinforcement of cross sectional weak points in openings
Whether new building or renovation project – time and again installation work and the necessary openings in
load-bearing components pose considerable problems in terms of the load-bearing capacity of the structure. It is often
necessary to raise the floor structure or suspend ceilings in order to compensate for excessively large cross sections
of the timber beams. With HECO-TOPIX®-CC you can avoid wood grain splitting.
HECO-TOPIX®-CC screws are screwed in to the right and left of the potential breakage points of the component openings so as to provide the necessary reinforcement of the supporting beam with weakened cross section.
6. Transmission of considerable compressive forces
Slender cross sections and high loads – time and time again, this constellation poses problems in timber construction
applications. Although the slender, visually appealing component can take up the necessary compressive forces, it would
press too much into the supporting beam. This results in an increase in the cross section or the need for a steel component
with large-area load transmission. The HECO-TOPIX®-CC screw renders bulky, oversized cross sections or steel compo-
nents unnecessary. When screwed in, the screw can be subjected to compressive load and transmits the applied loads
over the entire length of the thread into the load component. The steel plate practically matching the size of the cross
section can thus be placed directly onto the flat surface of the all-thread screws.
