Atas Smarts #4 - FM Global Wind Uplift Ratings
Understanding who Factory Mutual (FM Global) is, what an FM wind uplift rating is, the testing involved to assign FM ratings and the differing rating requirements per the FM revision in 2006.
- 1.What do the letters "FM" stand for related to the article you just read?
- A.
Factory Mission
- B.
Fly Missile
- C.
Factory Mutual
- D.
Fail Miserably
- 2.What type of organization is FM?
- A.
Insurance Company
- B.
Governing Code Body
- C.
Roofing Industry Association
- D.
Independent Product Testing Facility
- 3.Who conducts FM's testing and who writes their standards?
- A.
Independent product testing facility
- B.
Governing code officials
- C.
Roofing industry association
- D.
FM's own in-house engineers
- 4.What is NOT considered an FM approved roof deck?
- A.
Cementitious wood fiberboard
- B.
24 Gauge Steel
- C.
22 Gauge Steel
- D.
Fiberglass reinforced plastic
- 5.Which area of the roof is LESS susceptible to wind uplift damage?
- A.
Corners
- B.
Perimeter
- C.
Field Area
- D.
Ridge
- 6.FM Global recommends a minimum "Importance Factor" of _____ for all roof designs.
- A.
2.0
- B.
1.15
- C.
2.15
- D.
3.0
- 7.FM Global recommends a minimum "Safety Factor" of _____ for roof designs of a "special use facility" (such as a hospital or nursing home).
- A.
3.0
- B.
1.15
- C.
2.15
- D.
2.0
- 8.When testing a mechanically attached single-ply roof system, the test frame assembly is clamped to a pressure vessel that is pressurized to 15 lbs psf for the first minute. The process is then repeated in _____ lb increments until any component in the system fails.
- A.
5
- B.
10
- C.
15
- D.
20
- 9.Wind uplift classification rating of 1-90 represents:
- A.
Class 1 wind speed and 90 lbs psf of actual field of roof wind uplift pressure
- B.
Class 1 wind speed and 45 lbs psf of actual field of roof wind uplift pressure
- C.
Class 1 interior fire classification and 90 lbs psf of actual field of roof wind uplift pressure
- D.
Class 1 interior fire classification and 45 lbs psf of actual field of roof wind uplift pressure
- 10.What is considered the default standard for roofing systems that are NOT located on a coastal or high wind area?
- A.
FM 1-60
- B.
FM 1-90
- C.
FM 1-75
- D.
FM 1-105
- 11.For an FM 1-90 rating, with the latest FM revision in 2006, it requires the perimeter of the system must meet _____ and the corners of the system must meet _____.
- A.
FM 1-150 (perimeter) and FM 1-225 (corners)
- B.
FM 1-195 (perimeter) and FM 1-295 (corners)
- C.
FM 1-225 (perimeter) and FM 1-330 (corners)
- D.
FM 1-255 (perimeter) and FM 1-360 (corners)
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