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定价： 1177元 / 折扣价： 1001 元

定价： 774元 / 折扣价： 658 元

定价： 1333元 / 折扣价： 1134 元 加购物车

定价： 0元 / 折扣价： 0 元 加购物车

定价： 689元 / 折扣价： 586 元 加购物车

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定价： 481元 / 折扣价： 409 元

定价： 481元 / 折扣价： 409 元

4.1 A major concern for administrative officials is the security of barriers used in detention/correctional facilities. These test methods are designed to aid in identifying levels of physical security for horizontal fixed barriers, which serve to enclose or separate secure areas. This does not apply to the passage of contraband or vandalism.4.2 These test methods are not intended to provide a measure of resistance for a ceiling subjected to attack by corrosive agents, by high-powered rifles, explosives, sawing, or other such methods not typically available to inmates. These test methods are intended to evaluate the resistance of a ceiling to violent attacks by sustained manpower using battering devices, such as benches, barbells, bunks, or tables; and by an upward static force such that could be applied by an inmate pushing against the ceiling with his hands, feet, or back (that is, squat position on a top bunk in a cell). Attacks from outside the facility and fire resistance ratings are not addressed in this standard.4.3 The primary purpose or result of these test methods is to approximate the levels of abuse to which horizontal fixed barriers could possibly be subjected in the field. The desired result of its use is to help provide assurance of protection to the public, to facility personnel, and to the inmates themselves.4.4 It is recommended that detention/correctional facility administration provide adequate training, supervision, and preventive maintenance programs to enable horizontal fixed barriers to function as intended throughout the expected service life.1.1 These test methods cover requirements for simulated service tests and testing equipment for determining the performance characteristics of horizontal fixed barriers designed to incarcerate inmates in detention and correctional institutions. The testing equipment provides for the setup and testing of sample barriers and installation systems.1.2 It is the intent of these test methods to help ensure that detention security horizontal fixed barriers perform at or above minimum acceptable levels for control of passage to unauthorized or secure areas, to confine inmates, and to delay and frustrate escape attempts. Provide security grilles, access doors, light fixtures, and similar assemblies compatible with these levels of performance, with test apparatus adjustments as required to suit the particular product.1.3 These test methods apply to horizontal fixed barriers enclosing or separating secure areas of detention/correctional facilities.1.4 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversion 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.

定价： 646元 / 折扣价： 550 元 加购物车

定价： 481元 / 折扣价： 409 元

1.1 This specification covers round, extra-high-strength and ultra-high-strength, Class A zinc-coated (galvanized), steel core wire used for use in Overhead Electrical Conductors.1.2 This specification covers wire of diameter from 0.0500 in. to 0.1900 in. inclusive or 1.27 mm to 4.82 mm inclusive.1.3 The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from the two systems may result in non-conformance with the standard.1.4 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.1.5 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

1.1 This specification covers round, extra-high-strength, and ultra-high-strength, Class A coated zinc–5 % aluminum-mischmetal (Zn–5Al–MM) alloy-coated, steel core wire for use in Overhead Electrical Conductors.1.2 This specification covers wire of diameter from 0.0500 in. to 0.1900 in. inclusive or 1.27 mm to 4.82 mm inclusive.1.3 The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from the two systems may result in non-conformance with the standard.1.4 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.1.5 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

This specification covers non-specular surface finishes on overhead aluminum electrical conductors to establish a uniformity of conductor finish that is acceptable to the user. Such a specification will furnish a basis for consistent manufacturing process control. Overhead aluminum electrical conductors, when installed, tend to have a "reflective" or "specular" surface that can make a transmission line more noticeable in appearance against the background landscape. A factory treatment process of the outer surface of the aluminum wires can turn the surface finish into a dull, non-reflective, or "de-glared" matte grey finish that allows the conductor to become less visible when observed from a distance and enables the transmission line to blend in with the skyline or landscape background. This specification addresses ordering information, equipment, test procedure, requirements, and retest.1.1 This specification covers non-specular surface finishes on overhead aluminum electrical conductors. Overhead aluminum electrical conductors, when installed, typically have a shiny surface appearance. This “reflective” or “specular” surface can make a transmission line more noticeable in appearance against the background landscape. A factory treatment process of the outer surface of the aluminum wires can render the surface finish into a dull, non-reflective, matte grey finish. This non-reflective or “de-glared” surface finish allows the conductor to become less visible when observed from a distance and enables the transmission line to blend in with the skyline or landscape background.21.2 This specification is intended, by means of diffuse reflectance measurement, to establish a uniformity of conductor finish which is acceptable to the user. Such a specification will furnish a basis for consistent manufacturing process control.1.3 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.1.4 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.1.5 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

1.1 This specification covers non-contact high-voltage proximity alarms used to detect high voltage alternating current (ac) on overhead power lines. The high-voltage proximity alarm (HVPA) is limited to the detection of voltage greater than 600 V ac at power system frequencies between 50 to 60 Hz.1.2 High-voltage proximity alarms provide audible/visual alerts and may have the ability to limit movement of equipment.1.3 The use, installation, and maintenance of these high-voltage proximity alarms are beyond the scope of this specification. This standard does not purport to address installation, in service care or use.1.4 This standard demonstrates the high voltage proximity alarm (HVPA’s) ability to detect an e-field, and not the effects of various configurations of multiple power lines.1.5 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.1.6 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. Specific warnings are given in 9.1.4 and 10.9.2.1.7 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： 646元 / 折扣价： 550 元 加购物车