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Abstract
This paper reports on a test method used in the laboratory to measure the tensile strength of adhered roofing systems normal to the surface of the roofing, records some preliminary test data, shows how the laboratory data may be used to determine the moisture sensitivity of individual materials, and provides two examples (wind uplift and a study of primers for built-up roofing adhered to concrete or gypsum decks) to illustrate the practical use of these test data. Roofing matertial manufacturers often publish the tensile strength of the materials they provide in the machine direction (the direction the material passes through the manufacturing equipment) and the cross machine direction (the direction perpendicular to the machine direction in the plant of the material). Roof insulation board manufacturers often provide values for the compressive strength of their products. While these values are important for quality control and may be used as performance attributes to the individual components, they cannot be used to determine the uplift resistance of the complete built-up roof assembly. The following outlines the lab test method that can be used to measure the uplift resistance of entire adhered roof systems, the cohesive strength of the board insulations (frequently the weak link in fully adhered systems), or system components.
This paper reports on a test method used in the laboratory to measure the tensile strength of adhered roofing systems normal to the surface of the roofing, records some preliminary test data, shows how the laboratory data may be used to determine the moisture sensitivity of individual materials, and provides two examples (wind uplift and a study of primers for built-up roofing adhered to concrete or gypsum decks) to illustrate the practical use of these test data. Roofing matertial manufacturers often publish the tensile strength of the materials they provide in the machine direction (the direction the material passes through the manufacturing equipment) and the cross machine direction (the direction perpendicular to the machine direction in the plant of the material). Roof insulation board manufacturers often provide values for the compressive strength of their products. While these values are important for quality control and may be used as performance attributes to the individual components, they cannot be used to determine the uplift resistance of the complete built-up roof assembly. The following outlines the lab test method that can be used to measure the uplift resistance of entire adhered roof systems, the cohesive strength of the board insulations (frequently the weak link in fully adhered systems), or system components.
Date
0/1988
0/1988
Author(s)
Carl Cash
Carl Cash
Page(s)
213-222
213-222
Source
Society of Chemical Industry
Society of Chemical Industry
Keyword(s)
tensile strength; uplift resistance; cohesive strength; moisture sensitivity
tensile strength; uplift resistance; cohesive strength; moisture sensitivity