Table Size Effect on Wind Resistance of Mod-Bit Roofing Systems

Roofing systems have been vulnerable to strong wind uplift pressures. Roofing systems are basically evaluated for wind uplift pressures according to standardized test methods.Currently, there is no consensus on the ideal table size to be used in these testing protocols. Table size effect has been recently studies by the authors for the Thermoplastic roofing systems. The objective of this paper is to study the impact of table size on the Modified Bituminous (Mod-Bit) roofing system performance. To achieve this purpose, extensive analytical experiments have been conducted to investigate the performance of Mod-Bit roofing systems subjected to wind uplift pressures. Analytical results compared well with those obtained from experimental work, benchmarking the numerical modeling. This paper presents some of these comparisons and also suggests ideal table sizes and correction factors for various configurations having Mod-Bit membrane.