Green Roofs - Living Architecture Monitor - Spring 2013 - (Page 12)

RESEARCH living aRcHitectuRe meets HuRRicane sandy INDUSTRy LEADERS SHARE HOW THEIR GREEN ROOfS AND WALLS HELD OUT AGAINST SUpERSTORM SANDy BEN fLANNER, BROOKLyN GRANGE The Brooklyn Grange’s rooftop farms held up well through Hurricane Sandy. Our farm in the Brooklyn Navy Yard sits atop an eleven-story building along the East River coastline, where the winds were among the strongest in the city. To prepare, we spent a day wind-proofing— ensuring that irrigation lines were tacked down, sinks tipped over, tables collapsed, piles weighted and chickens protected. We then obeyed the mandatory evacuation orders from Flood Zone A. Had the storm come in mid-summer, our farm would have sustained thousands of dollars of crop loss due to the winds. However, being in October, we had a limited amount of crop value in the ground. The next morning when we arrived, the power outage sent us climbing eleven flights of stairs. We found that bits of soil did erode, however not substantially; and that the green roof infrastructure had held up with fortitude. However, living vegetables were whipped up from the wind. Rainbow chard looked like it had been through the washing machine, and some of our few remaining turnips and radishes were nearly pulled out by the roots. Most plants grew back. RyAN MILLER, GREEN ROOf TECHNOLOGy In the spring of 2012, Green Roof Technology introduced the first Sun-Root™ LIVING ARCHITECTURE MONITOR / SpRING 2013 12 12 fALL 2012 / / System to North America, installing a 1kW producing system atop the New York City Parks & Recreation’s administrative office building on Randall’s Island. The system is the first non-penetrating PV mounting system that utilizes an extensive green roof layer as ballast. The green roof provides a cooling element that increases the output of the solar panels, while stormwater runoff from the panels provide irrigation. Recent Superstorm Sandy made landfall in late October 2012, only six months after installation, and left without moving the system an inch. New York City reported maximum sustained winds at 85 mph with some gusts reaching 92 mph. Upon visiting the site a week after the storm made landfall, we found that our original placements of the Sun-Root™ System withstood the winds without a shift. Often overlooked is the importance of roots that bind together the entire green roof. JAMES SABLE, GREENSCREEN® The four story Staten Island Courthouse parking structure was designed by Ennead Architects and the construction oversight was provided by T. Moriarty & Sons, Inc. in 2010. The Courthouse was designed to achieve LEED Gold status and the adjacent parking structure includes green facade systems. Green facade designs that occur in the hurricane zones of the Eastern Seaboard require specific engineering for extreme wind loading that could exceed 160 MPH, depending on exposure. This project also included detailing for ice and snow loads in addition to wind loads. Manufacturers of green facade systems must provide data for engineers showing mounting details that exceed these values, especially for public structures. Strict adherence to construction details, proper placement of system connections, and verification by an onsite inspector were part of

Table of Contents for the Digital Edition of Green Roofs - Living Architecture Monitor - Spring 2013

Green Roofs - Living Architecture Monitor - Spring 2013
From The Founder
On the Roof With...
Policy and Standards
Current Research
Living Architecture Meets Hurricane Sandy
How Healthy Is Your Hospital?
New Corporate Members
Professional Calendar
GRHC Board Member Updates
GRHC Buyer’s Guide
The Lucky 7

Green Roofs - Living Architecture Monitor - Spring 2013