Finite element analysis of racked vs. traditionally applied three tab, seal tab, strip shingles, and blister tests for asphalt-glass felt shingles
This paper compares the stresses developed by wind and by a sudden drop in temperature, using finite element analyses on three tab, self-sealing, asphalt-glass fiber felt shingles, that are rack installed (with three and four nails per shingle in alternate tiers), with the same shingles that are conventionally installed (diagonal lay-up, with four nails per shingle). From these studies, the authors concluded that the nailing pattern is not significant, as long as the shingles tabs remained sealed. The authors confirmed these conclusions using their wind tunnel and environmental chamber on commercially produced shingles. As a separate and unrelated matter, this paper also discusses the evaluation of blistered asphalt-glass fiber felt strip shingles using digital fluoroscopy, and the results of several laboratory tests that are intended to measure the blistering tendency of asphalt coated products.
- Research Organization:
- Simpson Gumpertz and Heger Inc., Arlington, MA (US)
- OSTI ID:
- 20000865
- Report Number(s):
- CONF-981237-; ISBN 0-8031-2494-5; ISSN 1050-8104
- Resource Relation:
- Conference: Roofing Research and Standards Development, Nashville, TN (US), 12/06/1998; Other Information: PBD: 1999; Related Information: In: Roofing research and standards development: Fourth volume. ASTM special technical publication 1349, by Wallace, T.J.; Rossiter, W.J. Jr. [eds.], 159 pages.
- Country of Publication:
- United States
- Language:
- English
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