Greatone76
Structural
- Feb 2, 2006
- 64
We have been checking street poles and other utility poles for new load. We are running into problems when we have typical fabric/vinyl banners. The increased wind sail area takes up a lot of capacity in a hurry. We are typically having to request that the banners be removed one side of the pole and/or both sides. Our biggest concern is if this actually happens and how would you prevent someone during the next banner change from replacing the banner(s) and bracket(s).
We have an individual banner and banner bracket manufacturer that provides an effective wind area for the banner based on actual wind testing using their brackets. Would anyone know of actual published information we could use to get that number or similar numbers for the reduction of wind area for something like a fabric or other flexible material in the wind? The typical bracket has a roughly 20% reduction. They make a special bracket that they have testing that says it had a roughly 40% reduction, so it would appear that how a banner is attached would have a large impact on how much wind it would catch. Again would anyone have published information on what effects different mounting of fabric or other flexible material would have in regards to wind load?
Does anyone have experience with spring supported or breakaway brackets that would reduce the wind load being transferred to the pole since they would only support load up to X amount? Do they exist and are they a reasonable solution?
Anyone had any other ideas to help reduce the loads imparted by banners on street pole?
We have an individual banner and banner bracket manufacturer that provides an effective wind area for the banner based on actual wind testing using their brackets. Would anyone know of actual published information we could use to get that number or similar numbers for the reduction of wind area for something like a fabric or other flexible material in the wind? The typical bracket has a roughly 20% reduction. They make a special bracket that they have testing that says it had a roughly 40% reduction, so it would appear that how a banner is attached would have a large impact on how much wind it would catch. Again would anyone have published information on what effects different mounting of fabric or other flexible material would have in regards to wind load?
Does anyone have experience with spring supported or breakaway brackets that would reduce the wind load being transferred to the pole since they would only support load up to X amount? Do they exist and are they a reasonable solution?
Anyone had any other ideas to help reduce the loads imparted by banners on street pole?
