| Total run length and joining | How many linear feet you are covering, in how many separate runs, and therefore how many stock lengths, splices and end caps you need. | Order by linear feet and by run, not by piece count. Splice connectors and end caps are routinely left off a first quote and then noticed on site. |
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| What you are hanging | The single biggest driver. Paper and card, framed and glazed work, and large format banners each want a different grip and a different capacity. | Specify the heaviest thing that will ever hang there, not the typical thing. Displays get more ambitious after the rail is in. |
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| Grip mechanism | Pins into cork, a spring jaw, magnets, or cables and hooks from a track. This sets the cost, the speed of changeover and who can operate it. | Match it to whoever changes the display. A mechanism that needs a knack will quietly stop being used and the tape will come back out. |
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| Finish and colour match | How visible the rail is: clear or satin anodized aluminum, painted colours, wood and wood-effect caps, and the colour of the cork or vinyl face. | Ask for a physical sample against the wall colour. Anodized silver and white read very differently on a warm wall, and a photograph will not tell you which is right. |
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| Wall substrate | Which anchors are required, whether the rail can be wall-mounted at all, and how much of the cost is labour rather than product. | Confirm the substrate before ordering, not on installation day. Glass, demountable partitions and old plaster all change the answer. |
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| Adjustability | Whether hanging positions are fixed at install or can be moved afterwards, and how quickly a full rehang can be done. | The more often the display changes, the more a track system earns its higher price. For a rail that changes twice a year, it is money spent on flexibility you will not use. |
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| Budget per linear foot | The honest comparison unit, taking in rail, inserts, end caps, splices, hooks, cables and the anchors the wall requires. | Compare installed cost per linear foot, not the headline price of the extrusion. Hardware and labour routinely add more than the rail itself. |
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