Facilities insured by FM in hail-prone zones must make sure their roofing assemblies meet specific VSH requirements. Elevate has hundreds of VSH approved assemblies encompassing most membrane types, as you'll learn about below.

2020年2月25日 · FM Global, a leading commercial building insurer, and its code-approved testing agency subsidiary, FM Approvals, have created a Very Severe Hail (VSH) impact resistance classification that could affect design professionals.

2017年12月1日 · FM Loss Prevention Data Sheet 1-34 (FM 1-34), "Hail Damage," provides a map identifying these regions. In recent years, the U.S. insurance industry has experienced increases in losses from hail in terms of the number of claims experienced and costs of those claims.

2023年1月30日 · FM's LPDS 1-34 identifies the hail hazard areas across the United States: Moderate Hail hazard area, Severe Hail hazard area, and Very Severe Hail (VSH) hazard area which are defined by hail size. Note that the VSH area roughly correlates to Hail Alley. Hail Alley receives more hailstorms, and more severe ones, compared to other parts of the ...

Very Severe Hail (VSH) hazards area: Areas in which the hail size exceeds 2 in. (51 mm) for the 15-year mean recurrence interval (MRI). The MH, SH and VSH hazard areas are shown in Figure C-1, Hailstorm hazard map for the contiguous United States. See the last page of this TechFlash for the hailstorm hazard map.

2018年5月1日 · The most notable change in FM 1-34 is the implementation of the VSH approval classification into hail-resistance design guidelines. FM 1-34 divides the continental U.S. into three hail zones: moderate hail (MH), severe hail (SH) and VSH hazard areas. A hailstorm hazard map for the contiguous U.S. is provided.

VSH region. In the interim, FM 1-34 has recommended using assemblies tested to a Class 4 rating using FM 4473, “Specifica-tion Test Standard for Impact Resistance Test-ing of Rigid Roofing Materials by Impacting with Freezer Ice Balls.” FM 1-34 indicates aggregate- and paver-ballasted roof systems can be substituted for

2020年12月8日 · FMG’s changes included a notable expansion of the VSH zone geography, and significantly ramped-up accelerated membrane weathering and simulated hail impact testing required to achieve VSH system approval.

2020年8月24日 · In 2017, FM introduced the Very Severe Hail (VSH) approval, consisting of a 2-inch diameter ice ball shot out of a pressurized air cannon. The ice ball impacts the membrane and substrate at approximately 110 miles per hour, …

2022年1月10日 · FM 1-34 outlines recommendations and contains a map of the U.S. outlining areas of Moderate Hail (MH) and Severe Hail (SH). In 2014, FM determined it needed another category to stress the importance of the risk and created the Very Severe Hail (VSH) classification, which is included in their FM 1-34 document.