Archatrak Inc. |
Wind Uplift & Shock Protection Plates
Any elevated paving laid without adhesives or other secure fixing to the substrate will be subject to the force of wind, with the risk in some cases of the pavers becoming airborne. It is essential that project managers, specifiers and end users carefully assess the local conditions where both porcelain pavers and Ipe wood tiles will be used in in elevated flooring applications, as well as complying fully with any local laws and regulations, including regulations relating to seismic events and hurricanes where relevant.
No test methods or standards currently exist specifically relating to the installation of porcelain pavers on rooftops or other elevated decking applications. To provide a level of assurance to clients wishing to install porcelain pavers or Ipe structural tiles for elevated decking supported by a pedestal system, Archatrak commissioned the Florida International University Wall of Wind facility to investigate the wind speed at which blowoff of pavers would occur on a test bed simulating a number of typical rooftop deck configurations.
- Parapet height of 0” and 12”
- Fixed height ( ½”) plastic support pads vs 8” high pedestals
- Variable wind angles
It was observed that blowoff of pavers occurred at the following wind speeds and conditions:
- Ipe tiles with 12” high parapet and 0° wind angle – 130 mph
- Porcelain pavers with 0” parapet, 45° wind angle, ½” high support pads – 130 mph
- Porcelain pavers with 12” parapet, 30° or 45° wind angle, ½” high support pads – 130 mph
- Porcelain pavers with 12” parapet, 30° or 45° wind angle, 8” high pedestals – 110 mph
Some movement of pavers was observed at lower wind speeds which in some cases, caused the spacer tabs on the pedestal heads to break. No specific testing was undertaken on potential hold down devices, but on the basis of this study, we suggest several options for increasing the the wind uplift resistance where this may be required due to specific site conditions.
Shock Control 2.0 is a flexible, self adhesive, fiberglass reinforced sheet supplied by Archatrak and pre-cut to cover the underside of a 23.5? x 23.5? (nom.) paver. The sheet is attached to the paver simply by peeling off the protective backing and pressing the sheet onto the underside of a dry paver. When installing Shock Control at low ambient temperatures it is essential to confirm that adequate adhesion is achieved and in no circumstances should Shock Control be applied when the ambient temp is below 32°F. Download installation guidelines here.
Note that this solution is primarily intended to hold together pieces of any broken paver and provide temporary support should a person be standing on a paver at the time of breakage. If any paver is broken while a person is standing on the paver, they should immediately step off the damaged paver as prolonged heavy weight applied to a damaged paver fitted with Shock Control 2.0 will cause it to sag and eventually fall.
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