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Abstract
Wind induced effects on roofing systems are dynamic because of the wind's variation with respect to time and space. Experiments were conducted at NRC/IRC on roofing materials. The data report4d in "Evaluation of Roof Fasteners Under Dynamic Wind Loading 1995" clearly indicated that the fastener failure load and mode differ significantly under dynamic testing as comapred to static testing. To develop a lab evaluation protocola for the roofing sytem, existing test prcedures wre systematically reviewed. The review includes: the standard lab test methods currently being practiced in North America, cush as FM 4470 and UL 580 procedures as well as several international test procedures used by the roofing industry. It has been concluded that the existing North American test methods are insufficient for evaluating roofing systems since they do not consider the effects of dynamic wind loading. In Europe, fatigue has been acknowledged as an important factor in the evaluation of mechanically attached roofing systems. Thus the European test methods are more realistic than those adopted in North America.
Wind induced effects on roofing systems are dynamic because of the wind's variation with respect to time and space. Experiments were conducted at NRC/IRC on roofing materials. The data report4d in "Evaluation of Roof Fasteners Under Dynamic Wind Loading 1995" clearly indicated that the fastener failure load and mode differ significantly under dynamic testing as comapred to static testing. To develop a lab evaluation protocola for the roofing sytem, existing test prcedures wre systematically reviewed. The review includes: the standard lab test methods currently being practiced in North America, cush as FM 4470 and UL 580 procedures as well as several international test procedures used by the roofing industry. It has been concluded that the existing North American test methods are insufficient for evaluating roofing systems since they do not consider the effects of dynamic wind loading. In Europe, fatigue has been acknowledged as an important factor in the evaluation of mechanically attached roofing systems. Thus the European test methods are more realistic than those adopted in North America.
Date
5/1995
5/1995
Author(s)
A Baskaran; O Dutt
A Baskaran; O Dutt
Page(s)
Keyword(s)
wind load; dynamic evaluation;
wind load; dynamic evaluation;