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Better buildings for extreme climates will be focus of researcher's talk
Date:5/20/2011

Rima Taher, an expert in the design of low-rise buildings for extreme winds and hurricanes, will speak next week at the Annual Conference of Construction Specifications Canada (Devis de Construction Canada) in Montreal. Taher, a university lecturer in NJIT's College of Architecture and Design, is a civil and structural engineer, http://www.njit.edu/news/experts/taher.php. Construction Specifications Canada (http://csc-dcc.ca) is a national, non-profit association with chapters across Canada. Its mission is to deliver and develop quality educational programs, publications and services for the construction industry.

Certain home shapes and roof types can make a big difference," is a common refrain in all her work.

Taher's key recommendations include the following.

Design buildings with square, hexagonal or even octagonal floor plans with roofs of multiple slopes such as a four-sloped hip roof. These roofs perform better under wind forces than the gable roofs with two slopes. Gable roofs are common only because they are cheaper to build. Research and testing demonstrate that a 30-degree roof slope will have the best results.

Wind forces on a roof tend to uplift it. "This explains why roofs blow off during extreme wind events," Taher said. To combat uplift, she advises connecting roofs to walls strongly with nails, not staples and hurricane clips. Stapled roofs were banned in Florida after Hurricane Andrew. The use of hurricane clips is recommended. The choice of roofing is important. Roofing systems perform differently under hurricane conditions. In tile roofs, loose tiles often become wind-borne debris threatening other structures.

Aim for strong connections between the structure and foundation. Structural failure-- one structural element triggering the collapse of anothercan be progressive.

Hurricane shutters can protect glazing from wind-borne de
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Contact: Sheryl Weinstein
sheryl.m.weinstein@njit.edu
973-596-3436
New Jersey Institute of Technology
Source:Eurekalert

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