ASTM E331 00 PDF

More E The air-pressure differences acting across a building envelope vary greatly. These factors should be fully considered prior to specifying the test pressure difference to be used. In service, the performance will also depend on the rigidity of supporting construction and on the resistance of components to deterioration by various causes, vibration, thermal expansion and contraction, etc.

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A number in parentheses indicates the year of last reapproval. This standard has been approved for use by agencies of the Department of Defense. Water that penetrates the assembly,but does not result in a failure as defined herein, may haveadverse effects on the performance of contained materials suchas sealants and insulating or laminated glass.

This test methoddoes not address these issues. The values given in parentheses are mathematicalconversions to inch-pound units that are provided for informa-tion only and are not considered standard. It is theresponsibility of the user of this standard to establish appro-priate safety and health practices and determine the applica-bility of regulatory limitations prior to use. For specific hazardstatements, see 7. Referenced Documents2.

For products withnon-planer glazing surfaces domes, vaults, pyramids, etc. Summary of Test Method4. Current edition approved Feb. Published March Originallyapproved in Last previous edition approved in as E — United States Significance and Use5.

The air-pressure differences acting acrossa building envelope vary greatly. These factors should be fullyconsidered prior to specifying the test pressure difference to beused.

NOTE 1—In applying the results of tests by this test method, note thatthe performance of a wall or its components, or both, may be a functionof proper installation and adjustment.

In service, the performance will alsodepend on the rigidity of supporting construction and on the resistance ofcomponents to deterioration by various causes, vibration, thermal expan-sion and contraction, etc. It is difficult to simulate the identical complexwetting conditions that can be encountered in service, with large wind-blown water drops, increasing water drop impact pressures with increas-ing wind velocity, and lateral or upward moving air and water.

Somedesigns are more sensitive than others to this upward moving water. NOTE 2—This test method does not identify unobservable liquid waterwhich may penetrate into the test specimen. Atleast one static pressure tap shall be provided to measure thechamber pressure, and shall be so located that the reading isunaffected by the velocity of the air supply to or from thechamber. The air supply opening into the chamber shall bearranged so that the air does not impinge directly on the testspecimen with any significant velocity.

A means of access intothe chamber may be provided to facilitate adjustments andobservations after the specimen has been installed. NOTE 1—For a negative pressure system, the water-spray grid would be located outside the chamber and the air supply would be replaced by anair-exhaust system.

The system must provide essentially constantairflow at a fixed pressure for the required test period. If additional nozzles are required to provideuniformity of water spray at the edge of the test specimen, theyshall be equally spaced around the entire spray grid. Excessivepressure differences may occur, however, due to error inoperation or when the apparatus is used for other purposes suchas structural testing; therefore, exercise adequate precautions toprotect personnel. Test Specimen8.

For curtain walls or walls constructed with prefabricated units,the specimen width shall be not less than two typical units plusthe connections and supporting elements at both sides, andsufficient to provide full loading on at least one typical verticaljoint or framing member or both.

The height shall be not lessthan the full building-story height or the height of the unit,whichever is greater, and shall include at least one fullhorizontal joint accommodating vertical expansion, such jointbeing at or near the bottom of the specimen, and all connec-tions at the top and bottom of the units. NOTE 3—It should be recognized, especially with windows, thatperformance is likely to be a function of size and geometry.

Therefore,select specimens covering the range of sizes to be used in a building. Ingeneral, the largest size of a particular design, type, construction, andconfiguration to be used should be tested. The calibration device is illustrated in Fig. The catch box shall be designed to receive only waterimpinging on the plane of the test specimen face and to excludeall run-off water from above. The box shall be mm 24 in. Use a cover approximately mm 30 in.

The water impinging on each areashall be captured separately. A spray that provides at least1. If a number of identical, contiguous,FIG. The system shall be calibrated with the catch boxesat a distance within mm 2 in. The reference point for location of thespray system from the specimen shall be measured from theexterior glazing surface of the specimen farthest from the spraysystem nozzles.

The water spray shall be installed parallel tothe plane of the specimen. Recalibrate at intervals of not morethan six months. Information Required Failure also occurs whenever water penetratesthrough the perimeter frame of the test specimen. Watercontained within drained flashing, gutters, and sills is notconsidered failure. Fit the specimen into or against the chamber opening with theoutdoor side of the specimen facing both the high pressure sideof the chamber and the water spray, and in such a manner, thatno joints or openings are obstructed.

Skylight specimens shallbe tested at the minimum angle from the horizontal for whichthey are designed to be installed. Seal the outer perimeter of thespecimen to the chamber wall and seal at no other points. NOTE 4—Nonhardening mastic compounds or pressure-sensitive tapecan be used effectively to seal the test specimen to the chamber opening,to seal the access door to the chamber, and to achieve airtightness in theconstruction of the chamber.

These materials can be used to seal a separatemounting panel to the chamber. Rubber gaskets with clamping devicesmay also be used for this purpose provided that the gasket is highlyflexible and has a small contact edge.

Adjust all hardware for maximum tightnesswithout interfering with their operation. Any modifications made on the specimen to obtainthe reported values shall be noted on the drawings.

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This e method does not identify unobservable liquid water which may penetrate into the test specimen. Give us a call to discuss your next project. ASTM E — 00 Failures during quality assurance new construction testing can result in unnecessary delays that impact your bottom line. For specific hazard statements, see 7. Historical Version s — view previous versions of standard. This test method does not address these issues. Most generic specifications call for a minimum testing pressure of 6.

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The ASTM E testing is performed by applying water to the exterior of the test specimen while lowering the pressure inside by means of an air chamber built on the inside or opposite side of the test specimen. The water spray system has nozzles spaced on a grid to deliver water so that the test specimen is wet uniformly, includingthose areas vulnerable to water penetration. The calibrated spray apparatus spray-rack system delivers water to the test specimen at a rate of 5. The testing pressure differential is usually determined by the testing specifier. Most generic specifications call for a minimum testing pressure of 6. BDG utilizes professional testing equipment that is calibrated to each specific testing standard for accurate results. Our field consultants are properly trained and knowledgeable of all testing standards.

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