定价： 819元 / 折扣价： 697 元

定价： 156元 / 折扣价： 133 元 加购物车

定价： 605元 / 折扣价： 515 元 加购物车

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定价： 156元 / 折扣价： 133 元 加购物车

定价： 590元 / 折扣价： 502 元 加购物车

5.1 This test method is a standard procedure for determining the air leakage characteristics of installed exterior windows and doors under specified static air pressure differences.NOTE 1: The air pressure differences acting across a building envelope vary greatly. The factors affecting air pressure differences and the implications of the resulting air leakage relative to the environment within buildings are discussed in the literature.3, 4, 5 These factors should be fully considered in specifying the test pressure differences to be used.5.2 Rates of air leakage are sometimes used for comparison purposes. Such comparisons may not be valid unless the components being tested and compared are of essentially the same size, configuration, and design.5.3 Rates of air leakage of essentially identical windows or doors, as determined in the laboratory (Test Method E283) and as measured in the field by this test method, have sometimes been used for comparison purposes. The correlation between the laboratory and field test results, and the correlation between actual performance of in-service products and the response to these tests has not been established because of insufficient data.5.4 Rates of air leakage, as determined by this test method may be affected by: the age or physical condition of the test specimen; the type or quality of installation; the care exercised in the attachment of the test apparatus and the determination of extraneous leakage; and the actual conditions to which the test specimen is exposed beyond those imposed by the test method, that is temperature, relative humidity, wind impingement, etc. Consideration must be given to the proper selection of test specimens, the choice of appropriate test technique (when a choice is given within this test method), and the proper use and interpretation of the results obtained from this test to minimize the effect of these conditions.5.5 Rates of air leakage, as determined by this test method may include air leakage that does not occur during normal operation and exposure, or that does not contribute to the overall air leakage for the structure. Air may be supplied to or exhausted from wall cavities or adjacent construction, or may bypass interior or exterior trim or components in a manner not experienced during normal operation or exposure. Care must be taken to prevent such leakage from occurring, or consideration must be given that such leakage may have occurred during the test.5.6 This test method addresses the issue of air leakage through the high pressure face of the test specimen only. Air leakage from the adjacent wall cavity through sill, head, and jambs of the window frame is considered extraneous air leakage and, therefore, not a component of the measured specimen air leakage. Such extraneous air leakage through the perimeter frame of the test specimen can be a significant source of air leakage into, or out of, the building if the frame is not sealed against air infiltration from the adjacent wall cavity.1.1 This test method provides a field procedure for determining the air leakage rates of installed exterior windows and doors.1.2 This test method is applicable to exterior windows and doors and is intended to measure only such leakage associated with the assembly and not the leakage through openings between the assemblies and adjacent construction. The test method can be adapted for the latter purpose, provided the potential paths of air movement and the sources of infiltration and exfiltration can be identified, controlled, or eliminated.1.3 This test method attempts to create and given set of natural environmental conditions. There is a strong possibility that the test method or the test apparatus may, by virtue of their design and use, induce air leakage that does not occur under natural environmental exposure.1.4 This test method is intended for the field testing of installed exterior windows or doors. Persons interested in laboratory testing of fenestration products should reference Test Method E283.1.5 Persons using this procedure should be knowledgeable in the area of fluid mechanics and instrumentation practices, and shall have a general understanding of fenestration products and components.1.6 The values stated in SI units are to be regarded as standard. The values given in parentheses are mathematical conversions to inch-pound units that are provided for information only and are not considered standard.1.7 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. For specific precautionary statements, see Section 7.1.8 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.

定价： 590元 / 折扣价： 502 元 加购物车

定价： 590元 / 折扣价： 502 元 加购物车

4.1 This practice is applicable to all interior and exterior installed building products in the use phase of the product, specifically in the form present in the occupied building. This practice does not cover products during installation processes since those exposures are covered by occupational regulations.4.2 This practice specifies the required information to include in the OESR screening report for product decision makers to assess the potential for occupant health exposure from installed building products in an occupied building operated under normal and anticipated conditions of use.4.3 Fundamental to the selection and use of building products is the consideration of the likelihood of occupant exposure and possible risk to substances in those installed building products.4.4 This practice does not purport to offer full risk information, nor does it purport to be equivalent to an exposure or risk assessment. Rather, it provides screening to inform the product decision maker about conditions that could generate additional discussions with manufacturers or others.4.5 The informational requirements for an OESR are identified in Section 5.4.6 For substances with hazard classifications in 5.3, the OESR informs product decision makers about substances in an installed building product that might trigger a hazard warning to a user or building occupant. This information is designed to help the product decision maker determine whether added information is needed to evaluate exposure and risk more fully in the context of the installed building product’s specific use or application.4.7 The OESR screening report is required to be updated based on the requirements in 9.3.4.8 The OESR is completed by last manufacturer of the building product; this is the manufacturer offering the external or internal building product to the market. This manufacturer may need to obtain information from other manufacturers in its supply chain.NOTE 1: The manufacturer offering the building product to the market is aware of the form, function, and likely uses of the building product under normal conditions of use. If the product contains hazardous substance(s), it is likely that the manufacturer has information about the hazards from the product under foreseeable emergencies in compliance with OSHA requirements.1.1 This practice provides the information required for publishing a screening report for occupant exposure from substances in installed building products (OESR) to communicate possible human health impacts in an occupied building to product specifiers, building owners, and others.1.2 This practice is applicable to all interior and exterior building products in the form used and incorporated into an occupied building.1.3 An article going into the construction market that has potential hazards based upon an evaluation of the United Nations Globally Harmonized System of Classification and Labelling of Chemicals (GHS) (1)2 mixtures guidance is included in the scope of this practice.1.4 This practice does not cover product fabrication or installation processes because these are subject to worker safety and health regulations and law.1.5 The final building product manufacturer offering the building product to the market or agent is responsible for providing this information and completing this report.1.6 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.1.7 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.1.8 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.

定价： 646元 / 折扣价： 550 元 加购物车

This specification covers the minimum material requirements and describes the procedures for installing concrete pavements and linings in corrugated steel pipes and structural plate structures in the field. Concrete pavements shall be placed after the pipe has been installed. The concrete for pavements shall meet a minimum compressive strength. Concrete linings shall be placed after the pipe has been installed and backfilled to final grade. Concrete materials for pavements and linings shall consist of Portland cement, fly ash (when used), aggregates and water. The concrete mix shall be uniform and homogeneous. Pavements shall have a troweled or untroweled surface finish as specified in the contract documents. When paving or lining new pipes, damaged pipe shall be replaced or repaired in accordance with the ASTM documents referenced herein. Cleaning preparations, pavement methods, lining methods, and curing shall be followed accordingly for installing concrete pavements and linings in corrugated steel pipes.1.1 This specification covers the minimum material requirements and describes the procedures for installing concrete pavements and linings in corrugated steel pipes and structural plate structures in the field. Specific designs with additional or greater requirements shall be detailed in the contract documents. This specification is applicable to paving or lining new pipes and for rehabilitating existing structures. The pipe to be paved or lined is described in Specifications A760/A760M, A761/A761M, and A762/A762M.1.2 This specification covers pipes 48 in. [1200 mm] and larger for pavements and 24 in. [600 mm] and larger for full linings.1.3 New pipes are to be designed in accordance with Practice A796/A796M and installed in accordance with Practice A798/A798M for factory-made pipes and Practice A807/A807M for structural plate structures. Structures to be rehabilitated shall be structurally stable.1.4 Pipes with plant installed concrete pavements and linings are covered under Specification A849.1.5 This specification is applicable to product in either inch/pound units as A979 or in SI units as A979M. Inch/pound units and SI units are not necessarily equivalent. SI units are shown in brackets in the text for clarity, but they are the applicable values when materials are ordered to A979M.1.6 This standard may involve hazardous materials, operations and equipment. The 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.

定价： 515元 / 折扣价： 438 元 加购物车

4.1 The inspection of installed thermoplastic storm and sewer pipe verifies proper installation of the product and establishes a baseline for comparison for further evaluation.4.2 This guide is useful as a reference by an owner in preparing project specifications and to identify, evaluate and interpret observations during post installation inspections of pipe.4.3 Field evaluations either remotely or with person entry should be made by an independent 3rd party engineering firm or duly appointed representative of the owner.1.1 This guide identifies pipeline components, recommended protocols and evaluation criteria to consider in the inspection and acceptance of installed thermoplastic pipe by either person-entry, or remote inspection.1.2 This guide is intended for installation related observations and assumes that pre-installation inspection has been completed and all final settlement of fill has occurred. Inspection should be a minimum of 30 days after installation. This inspection period could be increased to accommodate the installer’s warranty period, which is typically one year or greater.NOTE 1: Pipe types covered under this standard are typically installed under the AASHTO LRFD Bridge Construction Specifications or Practice D2321.1.3 It applies to the thermoplastic non-pressure gravity flow storm and sewer pipe manufactured in accordance with Specifications D3034, F679, F714, F794, F894, F949, F1803, F2306, F2435, F2562, F2648, F2763, F2764, F2881, F2947, F3123, ISO 21138, ISO 4435, ISO 8772 and ISO 8773. It may also be considered for use for any similar thermoplastic pipe products not covered by this list but with similar physical or performance characteristics if approved by the owner.1.4 Person entry is normally used unless extenuating circumstances preclude this type inspection by the engineer. Remote inspection is recommended for use for pipe diameters of 30 in. [750 mm] and smaller unless otherwise specified by owner or engineer. Person entry ultimately depends on the safety, size, and environmental consideration assessments by the engineer.1.5 Access of installed pipe for manual inspection should follow OSHA 29 CFR PART 1926 SUBPART AA or ISO 45001, or any other applicable regulations for confined space entry. 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 and health practices and determine the applicability of regulatory limitations prior to use.1.6 The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in each system are not necessarily exact equivalents; therefore, to ensure conformance with the standard, each system shall be used independently of the other, and values from the two systems shall not be combined.1.7 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.1.8 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.

定价： 590元 / 折扣价： 502 元 加购物车

定价： 515元 / 折扣价： 438 元 加购物车

4.1 These test methods are intended to measure the anchoring capability and shear resistance of power-actuated fasteners to provide information from which applicable design values are to be derived for use in structural applications, such as in members of concrete, concrete masonry, and steel.1.1 These test methods describe procedures for determining the static axial tensile and shear strengths of power-actuated fasteners installed in structural members made of concrete, concrete masonry, and steel.1.2 These test methods are intended for use with fasteners that are installed perpendicular to a plane surface of the structural member.1.3 Tests for combined tension and shear, fatigue, dynamic, and torsional load resistance are not covered.1.4 The values stated in SI units are to be regarded as standard. The values given in parentheses after SI units are provided for information only and are not considered standard.1.5 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. Specific hazard statements are given in Section 6.1.6 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.

定价： 590元 / 折扣价： 502 元 加购物车

5.1 This is not a routine test. The values recorded are applicable only to the tank being tested and at the time of testing. This test is intended only to demonstrate the sealing effectiveness of the installed system. Structural design of the tank is defined or demonstrated within the scope of other applicable specifications and test methods, including Specification C1227.1.1 This test method covers procedures for testing precast concrete tanks (and installed accessories) used for on-site wastewater treatment, grease interception, grit/oil separation, water storage, or other applications requiring watertight construction and installation. This test method uses partial vacuum to demonstrate the integrity of the installed materials and the construction processes.1.2 This test method is intended to be used to demonstrate the condition of the installed system (precast concrete tank and accessories) prior to backfill.1.3 Testing of the system before backfill is necessary so as to preclude inadvertent structural overloading of the system components during the test.NOTE 1: Vacuum test criteria presented in this test method are similar to those in general use. The test and criteria have been widely and successfully used in testing manholes as specified in Test Method C1244.1.4 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.1.5 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 and health practices and determine the applicability of regulatory limitations prior to use.1.6 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.

定价： 515元 / 折扣价： 438 元 加购物车

CSA Preface This is the third edition of CAN/CSA-C108.4, Vehicles, boats, and internal combustion engine driven devices - Radio disturbance characteristics - Limits and methods of measurement for the protection of receivers except those installed in th

定价： 1547元 / 折扣价： 1315 元