Search results
Results from the WOW.Com Content Network
A vapor barrier on the warm side of the envelope must be combined with a venting path on the cold side of the insulation. This is because no vapor barrier is perfect, and because water may get into the structure, typically from rain. In general, the better the vapor barrier and the drier the conditions, the less venting is required. [7]
Aluminized hood or helmet cover with neck shroud, Aluminized jacket and pants complete with vapor barrier insulated liner, Aluminized lined gloves, Aluminized ARFF boots, Self-contained breathing apparatus (SCBA) (aluminized covers for air bottles, or suits that cover the air pack are also available).
In March, 2008, the city of Portland, Oregon, granted a waiver of the requirement for a vapor barrier or retarder when using cellulose insulation. [11] This appeal cited industry guidance that the combination of an exterior vapor retarder (as required by code) and an interior one could trap moisture in the wall, leading to damage.
Open-cell foam is porous, allowing water vapor and liquid water to penetrate the insulation. Closed-cell foam is non-porous, and not moisture-penetrable, thereby effectively forming a semi-permeable vapor barrier. (N.B., vapor barriers are usually required by the Building Codes, regardless of the type of insulation used.
In order to achieve these objectives, all building enclosure systems must include a solid structure, a drainage plane, an air barrier, a thermal barrier, and may include a vapor barrier. Moisture control (e.g. damp proofing) is essential in all climates, but cold climates and hot-humid climates are especially demanding. [8]
The Flame Resistant Organizational Gear (FROG) is a fire and heat protection system designed to help protect Marines from burn injuries associated with roadside bombs. Units with firefighting capabilities (Marine Wing Support Squadrons and Headquarters and Headquarters Squadrons) are issued firefighting suits and self-contained breathing apparatus.
Fire barriers are continuous through concealed spaces (e.g., above a ceiling) to the floor deck or roof deck above the barrier. Fire partitions are not required to extend through concealed spaces if the construction assembly forming the bottom of the concealed space, such as the ceiling, has a fire resistance rating at least equal to or greater ...
For example, information on microfilm is destroyed at 65.5 °C (149.9 °F) (a.k.a. Class 150) [citation needed] and magnetic media (such as data tapes) lose data above 51.7 °C (125.1 °F) (a.k.a. Class 125). [citation needed] Fireproof vaults built to meet the more stringent Class 125 requirement are called data-rated vaults. [citation needed]