December 13, 2016 by Canadian Underwriter
Developers and property owners in Ontario’s Dufferin County are eligible for rebates if they install hurricane straps in their buildings, a county official says.
Hurricane straps, which are metal bands that wrap around trusses and connect to walls, “can largely eliminate the risk of roof failures from an EF2 tornado,” Western University engineering professor Greg Kopp stated earlier.
The Enhanced Fujita scale, which has six ratings, has been used by Environment Canada since 2013 to measure the strength of tornadoes. EF0 tornadoes have wind speeds of 90 to 130 kilometres per hour while an EF 5 would have wind speeds of more than 315 km/h.
After a tornado touched down the community of Angus (adjacent to Canadian Forces Base Borden) in 2014, Kopp was quoted in media reports discussing hurricane straps. That caught the attention of Mike Giles, chief building official and director of facilities and property for Dufferin County.
Giles suggested to Canadian Underwriter that he met Kopp and got a tour of the wind research facilities in London, Ont.
Kopp is also research director of the Boundary Layer Wind Tunnel. Research from that facility is used by the Institute for Catastrophic Loss Reduction (ICLR), founded by Paul Kovacs, president and chief executive officer of Property and Casualty Insurance Compensation Corp. ICLR, which is affiliated with Western University, partnered with Dufferin County to offer the $4.50 rebate.
ICLR is kicking in $1.50 per hurricane clip while the county is contributing the other $3 per clip, Giles said Tuesday in an interview.
“I can’t make (hurricane straps) mandatory so I thought I would do a rebate program,” he said.
“The Ontario Building Code, for whatever reason,” has not made hurricane straps mandatory, Giles added. “It is not an expensive thing to do.”
Dufferin County includes the community of Shelburne, about 80 kilometres northwest of Toronto International Airport.
“We have the highest elevation in southern Ontario and we are sitting between Lake Ontario and Georgian Bay and to the west of Lake Simcoe,” Giles said of the county. Dufferin County is situated southwest of Barrie, which was badly damaged by a tornado in 1985.
“I personally was involved in the 1985 tornado that went through Grand Valley and Barrie,” Giles said. “I heard a friend of mine lost a few shingles. So a buddy of mine and I, we headed out to go help him. He lost shingles all right. He lost his whole house. So that was something else.”
A total of 12 people died as a result of a system of at least seven tornadoes that moved through southern Ontario May 31, 1985, according to an ICLR paper – A Tornado Scenario for Barrie, Ontario – published in 2002. At least 16 factories were “heavily damaged or destroyed,” according to the paper written by David Etkin, Soren Brun, Solomon Chrom and Pooja Dogra.
West of Barrie, the community of Angus had about 100 homes damaged June 17, 2014, as a result of a tornado. A week later, nearby Tottenham was hit by another tornado.
Elsewhere in the province, other notable tornadoes hit Woodstock area in 1979, Vaughan in 2009, Leamington in 2010 and Goderich in 2011.
The fact that hurricane straps are not mandated by the Building Code “is kind of a pet peeve of mine,” Giles suggested. Giles plans to meet next week with ICLR managing director Glenn McGillivray to plan a lunch and learn for local builders and building officials. No date has been set but the lunch and learn will probably be after Christmas, he added.