I have a roof top plaza in a hospital, in California. We planned on using a standard pedestal/paver system over a sloped substrate. OSHPD wants that paver system to be positively anchored (Screw/bolts or clips).
Anyone know of such a system? Colin lists a number of paver companies, but searching for an anchored system is not as easy as I hoped: http://www.4specs.com/s/07/07-7600.html?zoom_highlight=pavers
Arg…putting a million holes in a roof is a great solution. Did they give you any indication why?
Do you mean something like this
https://www.hanoverpavers.com/guardian-paver-system
or
http://www.tecturadesigns.com/products/pavers/lok-down-wind-uplift-resistance-system-rooftop-paving
or
http://ezypave.com/installation/wind-uplift/
Not cheap or necessarily easy. You’ll need to consider perimeter conditions and a lot of other factors.
Good luck.
If so, I misunderstood the question. Is the pacer to be secured, or the whole system (paver and pedestal) to be secured. I know Wassau or Hanover is working on a more concealed version of their locking system. Havent seen it yet.
Against what forces is the system to be secured?
Years ago, I had to prevent roof pavers from blowing off. It was enough to secure each paver to the adjacent ones to make a mat that we felt would resist blow-off dislodgement better than individual pavers would.
Ken, thanks for the quick response. I am not sure about these type of systems. OSHPD’s concern will be with seismic/lateral movement, not such much about wind lift, though that is also a factor.
Edit: Hours later, I see this tab is still open in my browser. Sigh… I meant to reply earlier. Sorry!
Hanover has the Staybar system with diagonal cables, but only required for heights 16 inches and higher. Sounds like a personal issue rather than a warranted issue with the product. Good luck!
From experience installing paver systems in California Hospitals reviewed by OSHPD, the issue is in the pedestal system, which will require anchoring of the pedestal as well as seismic bracing. The pedestals must also resist lateral shifting of the pavers, but this is usually a standard feature of he pedestal head design.
OSHPD is concerned about seismic issues. There have been problems with computer floors collapsing during earthquakes and they see this as similar.
I would ask whether the hospital could operate if the system of pavers had collapsed. Ask the plan checker what code section he is quoting. If it is on the roof and used as a social space I suspect that the concern is misplaced. Still it may be easier to accommodate the plan checker.
Can you use a variant of the bracing systems used for raised computer floors?
Involve the project structural engineer. If they have done hospitals before they should be familiar with the drill.
California hospitals are a unique experience.