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ASTM E1680-16(2022)
Standard Test Method for Rate of Air Leakage through Exterior Metal Roof Panel Systems
Přeložit název
NORMA vydána dne 1.5.2022
Informace o normě:
Označení normy: ASTM E1680-16(2022)
Datum vydání normy: 1.5.2022
Kód zboží: NS-1056656
Počet stran: 7
Přibližná hmotnost: 21 g (0.05 liber)
Země: Americká technická norma
Kategorie: Technické normy ASTM
Kategorie - podobné normy:
Anotace textu normy ASTM E1680-16(2022) :
Keywords:
air, air flow, air pressure, endlap, flow, flow meter, infiltration, leakage, mastic, metal, panel, pressure, roof, roof panel, sidelap, side seam, structural, thermal expansion, wall,, ICS Number Code 91.060.20 (Roofs)
Doplňující informace
| Significance and Use | ||||||||||||||
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5.1?This test method is a standard procedure for determining air leakage characteristics under specified air pressure differences. Note 1:?The air pressure differences acting across a building
envelope vary greatly. The slope of the roof and other factors
affecting air pressure differences and the implications of the
resulting air leakage relative to the environment within buildings
are discussed in the literature.4,5,6
These factors shall be considered fully when specifying the test
pressure difference to be used.
Note 2:?When applying the results of tests by this test
method, note that the performance of a roof or its components, or
both, may be a function of proper installation and adjustment. The
performance in service will also depend on the rigidity of
supporting construction, the presence of interior treatments, the
roof slope, and the resistance of components to deterioration by
various causes: corrosive atmospheres, aging, ice, vibration,
thermal expansion, and contraction, etc. It is difficult to
simulate the identical complex environmental conditions that can be
encountered in service, including rapidly changing pressures due to
wind gusting. Some designs are more sensitive than others to these
environmental conditions.
5.2?Rates of air leakage are sometimes used for comparison purposes. The comparisons are not always valid unless the components being tested and compared are of essentially the same size, configuration, and design. Note 3:?The specimen construction discussed in 1.2 and required in 8.1 isolates a source of leakage. The
rate of air leakage measured during the test method has units of
cubic feet per minute per square foot (litres per second per square
metre). Openings and details such as end laps or roof curbs are
excluded since leakage is measured more appropriately in cubic feet
per minute per foot (litres per second per metre) at these
conditions. The test specimen area is relatively small; the
inclusion of details will give unrealistic import to the detail's
presence when compared to actual roof constructions. This test
method shall not be relied on singularly to form conclusions about
overall air leakage through metal roofs. A roof contains many
details. Although prescribed modifications are outside the scope of
this test method, an experienced testing engineer is able to use
the principles presented in the test method and to generate
significant data by isolating specific details and measuring
leakage.
Additional leakage sources are introduced if details are included. If total leakage is then measured, the results will generally be conservative relative to tests without details. To minimize the number of tests, the specifier may allow details such as end laps when qualitative or general quantitative results are desired and the isolation of sources is not required for performance. Only one panel end lap shall be allowed. The user shall be aware of the bias when comparing alternate systems if end laps are included. Note 4:?This is a test procedure. It is the responsibility of
the specifying agency to determine the specimen construction, size,
and test pressures after considering the test methods' guidelines.
Practical considerations suggest that every combination of panel
thickness, span, and design load need not be tested in order to
substantiate product performance.
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| 1. Scope | ||||||||||||||
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1.1?This test method covers the determination of the resistance of exterior metal roof panel systems to air infiltration resulting from either positive or negative air pressure differences. The test method described is for tests with constant temperature and humidity across the specimen. This test method is a specialized adaption of Test Method E283. 1.2?This test method is applicable to any roof area. This test method is intended to measure only the air leakage associated with the field of the roof, including the panel side laps and structural connections; it does not include leakage at the openings or perimeter or any other details. 1.3?The proper use of this test method requires knowledge of the principles of air flow and pressure measurements. 1.4?The text of this test method references notes and footnotes excluding tables and figures, which provide explanatory material. These notes and footnotes shall not be considered to be requirements of the test method. 1.5?The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard. 1.6?This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use. 1.7?This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee. |
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| 2. Referenced Documents | ||||||||||||||
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