With that size banner, even with perforation in it, you most likely will hafta use telephone type pole standards and use the cable system like mentioned. Otherwise, your banner will eventually pull the uprights inward, causing much sagging.
To make sure the zip ties don't break off with friction with a the steel wire ... What do you think I can use ? I plan to leave this banner for long term so ......The only solution I know (if the poles are strong enough) is a steel cable turnbuckled taut, preferably top & bottom and then grommets w/ hvy duty zip ties every 2 feet or so and heavy bungees to the pole at the four corners. Would cost more than the banner though.
We use carabiner clips. They work great but they are expensive.To make sure the zip ties don't break off with friction with a the steel wire ... What do you think I can use ? I plan to leave this banner for long term so ......
Here are (2) 27ft x 4ft mesh banner which have been up for several months and still look the same. These were made by signs365 with rope in the hem. We used heavy bungee cords for attachment to the poles.
spring clips sewn in about every 2 feet top and bottom