The Performance of Concrete Tile and Terracotta Tile Roofing Assemblies Exposed to Wind-Driven Firebrand Showers

Manzello, Samuel L.

doi:10.6028/nist.tn.1794

Cited by 7 publications

(17 citation statements)

References 12 publications

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“…In either case, the number of firebrands that were observed to penetrate the tiles were similar. The offsetting of the tiles also did not hinder firebrand penetration in previous studies using the batch‐feed firebrand generator .…”

Section: Resultsmentioning

confidence: 68%

The performance of wood and tile roofing assemblies exposed to continuous firebrand assault

2016

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The performance of tile roofing assemblies as well as untreated cedar shake roofing assemblies exposed to continuous firebrand showers were compared. Specifically, experiments were conducted for two types of concrete tile roofing assemblies (flat and profiled), one type of terracotta tile roofing assembly (flat), and an untreated (without any fire retardant) cedar shake roofing assembly. The design of the roofing assemblies were based on construction guidelines in the USA. The duration of the firebrand flux was fixed at 20 minutes, and the wind speed was varied from 6 m/s to 9 m/s. These wind speeds were chosen to be able to compare roofing assembly performance to similar assemblies exposed to a batch-feed firebrand generator which had limited duration of firebrand exposure (6 min). The average firebrand mass flux that arrived at the surface of the roofing assemblies was 0.3 g/m2s Results indicated that for the untreated cedar shake assemblies, ignition occurred easily from the firebrand assault, and this type of roofing assembly generated their own firebrands after ignition. To attempt to quantify the degree of penetration, the number of firebrands that penetrated the tile roofing assemblies, and deposited onto the underlayment/counter-batten system was counted as function of wind speed for each assembly. Firebrand penetration was observed, even for the flat tile assemblies. It is believed that these are the first-ever experiments described in the peer-reviewed literature to expose wood and tile roofing experiments to continuous wind-driven firebrand showers.

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Section: Resultsmentioning

confidence: 68%

The performance of wood and tile roofing assemblies exposed to continuous firebrand assault

2016

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“…Experiments conducted using the NIST Dragon have provided experimental confirmation of this ignition mechanism for ceramic tile roofing [39]. Recently, concrete tile roofing assemblies (flat and profiled tile) as well as terracotta tile roofing assemblies (flat and profiled tile) commonly used in the USA, Australia, and elsewhere were exposed to wind-driven firebrand showers [42]. The purpose of these scoping experiments was to determine if firebrands were able to penetrate the tile assemblies and melt the underlying sarking material.…”

Section: Development Of New Experimental Technology: Nist Firebrand Gmentioning

confidence: 94%

“…Experimental investigations have been conducted using the NIST Dragon installed in BRI's FRWTF to expose roofing assemblies, building vents, siding treatments, walls fitted with eaves, and glazing assemblies to wind-driven firebrand showers [38][39][40][41][42]. In addition, the dangers of firebrand accumulation in front of structures have been quantified for the first time.…”

Section: Development Of New Experimental Technology: Nist Firebrand Gmentioning

confidence: 99%

“…For these tiles, the firebrands were observed to become trapped within the interlocking sections of the tiles and as a result, the firebrands were not transported past the tiles towards the sarking material. Based on the findings of these experiments, a potential cost-effective mitigation strategy might be to use a continuous underlayment of firebrand-resistant sarking [42]. The NIST Dragon technology has now been duplicated by other research laboratories.…”

Section: Development Of New Experimental Technology: Nist Firebrand Gmentioning

confidence: 99%

“…Figure 4 Detailed schematic of the feeding system for the full-scale continuous feed firebrand Firebrand Generator (top); side view of the main body (or Dragon) and the location where the feeding system provided wood pieces into the device is shown. This version of the device is modified from the NIST Dragon [38][39][40][41][42], and consisted of two parts: the main body and continuous feeding component (see Fig. 4).…”

Section: Continuous Wind-driven Firebrand Showersmentioning

confidence: 99%

See 2 more Smart Citations

Enabling the Investigation of Structure Vulnerabilities to Wind- Driven Firebrand Showers in Wildland-Urban Interface (WUI) Fires

Manzello¹

2014

Fire Saf. Sci.

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Wind-driven firebrand showers are a major cause of structural ignition in Wildland-Urban Interface (WUI) fires. Past firebrand investigations have not been able to quantify the vulnerabilities of structures to ignition from firebrand showers, as it is difficult to develop a measurement method to replicate wind-driven firebrand attack on structures that occur in actual WUI fires. To address this problem, research has been undertaken in an intricate area involving the quantification of structure vulnerabilities to wind-driven firebrand showers. This type of firebrand research has never been possible prior to the development of the NIST Firebrand Generator, also referred to as the NIST Dragon. Due the complexity of the WUI fire problem, great strides must be made to recruit the next generation of researchers to fire safety science from diverse backgrounds. This paper closes with a discussion of ongoing workshop activities intended to achieve this, as well as some challenges for future WUI fire research.

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Fences and Accessory Structures

Johnsson

2018

Encyclopedia of Wildfires and Wildland-Urban Interface (WUI) Fires

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The Performance of Concrete Tile and Terracotta Tile Roofing Assemblies Exposed to Wind-Driven Firebrand Showers

Cited by 7 publications

References 12 publications

The performance of wood and tile roofing assemblies exposed to continuous firebrand assault

The performance of wood and tile roofing assemblies exposed to continuous firebrand assault

Enabling the Investigation of Structure Vulnerabilities to Wind- Driven Firebrand Showers in Wildland-Urban Interface (WUI) Fires

Fences and Accessory Structures

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