TECNI 3mm Vertical Balustrade Cable into Metal Posts - 160.225.003
Details
TECNI® 3mm 316 Stainless Steel Vertical Cable Balustrade suitable for installation into metal posts.
Marine Grade Stainless Steel 3mm Vertical balustrade infill cable for infill up to 1 metre. (longer lengths can be manufactured on request please contact a member of our sales team). Due to natural deflection of wire, TECNI recommends maximum hole spacings of 80mm between vertical wires.
Both ends are suitable for installation into metal posts. Posts must be tapped M8x1.25 standard metric thread minimum 5mm wall thickness of material.
Thinner material wall thickness (less than 5mm) will require rivet nut (riv nut) inserts to ensure a secure termination.
Supplied as individual cable assemblies.
Please advise exact distance between inside faces of the balustrade at checkout and we will manufacture the assemblies to suit.
TECNI design and manufacture the Standard Vertical Wire Balustrading system with 3mm cable both for strength and aesthetic appeal. The majority of the fitting sits inside the top and bottom metal rails to minimise disruption of views.
Applications & Advice
About the cable infill
TECNI® designed its 3mm M8 Vertical Wire Balustrade system with 3mm cable both for strength and aesthetic appeal with minimal maintenance. The majority of the fitting sits inside the top and bottom metal rails to minimise disruption of views.
Suitability and Compliance with Standards
Balustrade Cable Infill Loads: The balustrade cable infill correctly installed at maximum 80mm spacings between each cable have been tested to meet the loading requirements stated in BS 6399-1 Table 4 - Minimum horizontal imposed loads for parapets, barriers and balustrades, etc. A(i) and (ii), B(iii), (iv) and (v), C3(viii) and (ix). Cable infill: Cable infill is designed for a uniformly distributed load of 1.0 kN/m2 (220 pounds per square metre approximately) plus a point load of 0.5 kN (110 pounds approximately). (See Appendix A for more details). Please ensure railing framework is in compliance with the relevant standard.
TECNI Assembly Part 160.125.003 - each end for Wooden Posts
TECNI Assembly Part 160.225.003 - each end for Metal Posts
TECNI Assembly Part 160.225.003 - one end for Metal Posts & one end for Wooden Posts
Installation tools required
1 x Drill
1 x 13mm Spanner to tighten the dome nut
* 1 x 8mm Allen Key
* 1 x 12mm Drill Bit (12mm hole for female wood insert fitting)
* Only required for wood insert
Installation Options
The cable assemblies are supplied ready assembled from our factory for installation into wooden or metal posts. Recommended installation tools are shown below (not supplied).
Drill Sizes for Wood
For wood insert use a 12mm diameter wood drill for the brass insert. Minimum Drill depth into wood = 37mm. This allows clearance for the stop ferrule at the end of the thread. Screw insert into the wood using a 8mm a/f Allen Key.
Drill Sizes for Metal
For metal use a 6.8mm diameter drill and tap the metal M8x1.25 standard metric pitch. Minimum wall thickness for direct thread tapping is 5mm otherwise use M8 rivnuts in thinner box section or tube.
FAQS
What measurement do I need to give to get cable assemblies manufactured?
Measure the inside faces of the top and bottom rail that you want to infill with the cables - see Figure 1 below.
How much tension is sufficient?
The infill cables are designed for a maximum infill opening height of 1 metre. Tension the cables to ensure that the gap between two cables cannot be deflected to more than 95mm. This will compensate for any constructional stretch over time that could increase the deflection to the 100mm allowable limit. There is no need to tension the cables more than this.
How do I tension the cables?
Wind the stainless tension fitting (part C above) into the brass wood insert for wooden material or the pre-tapped M8 hole/M8 Rivet Nut in steel material as equally as possible each end until sufficient tension is achieved. Don’t try to twist the cable, just the tension fitting.
What are the maximum spacings allowed between cables?
Due to natural deflection of wire, TECNI recommends maximum spacings of 80mm between vertical wires.
For installation into wooden posts, use the brass wood insert supplied. Drill a 12mm hole a minimum of 37mm depth and screw the insert into the wood using an 8mm allen key until the top of the insert is flush with the top of the rail.
For installation into hollow section metal posts ensure that there is sufficient M8x1.25 female metric thread to engage as much thread as possible but at least three full threads. If this cannot be achieved then you should use an M8 rivnut in compatible material for the post i.e. brass or stainless for stainless posts or zinc plated for galvanised posts.
How much tension is in each cable?
When tensioned to allow a maximum deflection of 95mm between cables at the central point there is approximately 70 kgf (0.68 kN) to 80 kgf (0.78 kN) in each cable.
How strong is each cable?
Each TECNI factory manufactured assembly has a tensile strength in excess of 300 kgf (2.94kN).
Will the cables stretch?
There will be minimal constructional stretch in each cable but this will not produce a noticeable slackening of the cables in lengths up to 1 metre.
Long term maintenance
All the components are manufactured from highly corrosion resistant materials.
Maintenance is minimal. Simply wash with soap and water if necessary and if required, the cables can easily be re-tensioned in just a few minutes without specialist tooling.
Appendix A Extract from BS 6399-1 Table 4
Minimum Horizontal imposed loads for parapets, barriers and balustrades, etc.
Dimensions
Please advise dimension "L" which is the distance between the inside faces of the top and bottom rails of the balustrade frame. The standard internal length for this cable infill system is 1 metre. We can manufacture longer or shorter cables as per your requirements.