A wire rope balustrade on a wooden sun deck, as pictured in this article, has a few pros and cons to it which I will discuss below. I will also describe the method used to install wire rope balustrades and what to be careful of to ensure that the job runs smoothly. If you don’t feel like doing it yourself, or don’t have the right tools or time, then scroll to the bottom and complete the contact us form below. I will contact you and we can take the task off your hands. Alternatively call us on 082 496 5444. We are Durban based.
Firstly one should choose the correct wire rope to use. We use the 4mm marine grade stainless steel wire rope with button heads. One can also get the 5mm wire rope but I have found that that often contains one rogue strand which will tarnish over time and spoil the look of your balustrade. The 4mm wire rope does not bend as easily as the others so where you get to a 90° bend you will need to terminate your wire rope with a button head and start again on the next run. The 4mm wire rope can bend around gentler curves quite easily. It is just the 90° bends that require a new run.
We start by installing our wooden, normally balau, uprights and these can be anything from a 30 x 60, 40 x 60 or 60 x 60. Obviously the 60 x 60 is better as it is more solid and stable, but it unavoidably carries a higher price tag. A 40 x 60 works very well, but the 30 x 60 can do the job just as well if installed properly. Now install your capping on the top to hold the whole lot together while you install your wire rope.
There are various methods of securing your wire rope. We use the button heads as opposed to turnbuckles. A hole is drilled, to a diameter slightly bigger than the button head, in the wooden upright and the wire rope is threaded through it so that the tag end is protruding to the outside of the balustrade. One side of the button head is then inserted over the wire rope and crimped using a special crimping tool. The crimping tool looks very similar to a large bolt cutter with a head that has been adapted to accept the button head and crimp it to the right size to hold the wire rope without damaging it.
Now cut a length of wire rope to slightly more than is required. Remember think twice, cut once as it is always easier to cut more off then to add more on once it has been cut too short. Now all your holes need to be drilled in all the other upright posts. Measure you spaces out accurately so that your wire rope will run parallel to the capping on the top and the wooden deck on the bottom. When drilling through a piece of wood it is easy to hold the drill slightly skew resulting in the drill bit exiting the wood at an angle which will result in the exit hole not being in the place it should be. So drill half way from one side and then drill from the other side to get your entry and exit holes perfectly lined up. It doesn’t matter if the middle of your hole is slightly skew because you can’t see it and it is not enough to impede the path of the wire rope. Thread the other un crimped end of the wire rope through all your holes in your uprights until you get to the end.
Now take the other button head with the thread on it and measure, very carefully, where you need to cut your wire rope. You will need to cut it with a thin cutting disk on a baby grinder so as to get a nice clean-cut. If you cut it too long you won’t be able to tension it and too short, well start again from the beginning. So cut and check before crimping the other end. The second button head will be inserted through the hole from the back and the wire rope inserted into it from the front and crimped. Make sure you have your thread to its longest position so that you still have thread to use to tension it. Now tension it, but do not over tighten it. It is not a guitar string and only needs to be tight enough to be visibly straight. Over tightening it will result in the end wooden uprights bowing, or even failing.
Pros of Wire Rope Balustrades
• Does not interfere in your vision when seated and looking through the balustrade
• Adds a second material, other than timber, for a clean minimalist look and feel
• Marine grade stainless will last a life time
Cons of Wire Rope Balustrades
• Does not offer as much protection from objects or people falling through the strands as timber does
• If installed incorrectly can look terrible
• Can detract from the timber look and feel
Good luck in installing your wire rope balustrade. I hope this article has helped. If you’re not up to it, please complete the form below, or contact us on 082 496 5444 and we will gladly quote you to do the task for you. We are Durban based and work throughout KZN.