4.1 This practice assists users in selecting appropriate performance characteristics of corrugated fiberboard or box construction, or both, commensurate with their user’s needs for packing and distribution of goods. This practice describes several attributes of fiberboard and boxes which relate to various hazards encountered in distribution and describes test parameters which may be specified by the user to ensure sufficient strength in the box for containment, storage, handling, transport and protection of contents.4.2 The user should specify only those attributes and related tests which are required for performance to the users satisfaction including their operations and distribution cycle(s). When using the carriers’packaging rules as the major basis for developing specifications, the reason for the rule and its function and importance should be understood. As previously stated, rules and regulations may be exceeded and should be when the minimum specifications are inadequate for the full effects of the distribution cycle, etc.. If the user decides to employ box compression strength or a rough handling performance protocol as the overriding specification, it should be noted that all minimum standards required by various organizations shall also be met or surpassed if using the related certificate. These minimum standards can be stated in the box drawing so as to ensure adherence to rules and regulations. If a Box Manufacturer’s Certificate (BMC) is printed on the box, then the ECT or Mullen Burst/Basis Weight values shall meet or exceed the minimum requirements for size and weight of the packaged product.4.3 See Appendix X7 for several examples of specification determinations.1.1 This practice provides information on corrugated fiberboard for the prospective user who wants guidance in selecting attributes of materials and box construction based on performance requirements. These attributes should be part of specifications which establish levels of the qualities a shipping container shall have achieved in order to be acceptable to the purchaser or user. The attributes and qualities should be testable, using standard methods that are recognized by both the buyer and seller. This practice will assist users in developing specifications for corrugated containers through an analysis of performance requirements and subsequent relationships to fiberboard materials and box construction attributes. This practice is meant to complement the box buyer–box manufacturer relationship by having the buyer (user) better understand, discuss, and negotiate needed elements of box design and specification. The full box design process is complex, and it is beyond the scope of this standard.1.2 The attributes and their levels should be based on the intended use of the box, including the handling and environment it will encounter. Many packaging rules include detailed descriptions of the materials that may be used and style, closure, or other construction details of allowed shipping containers. These rules are presented as minimum requirements; they may be exceeded for functional reasons, but there is no regulatory reason to do so. Rail and motor freight classifications applicable for surface common carrier transportation have established minimum requirements for certain attributes of corrugated packaging. These may or may not be appropriate for application in the complete distribution system, as they encompass only containerboard or combined corrugated board — not finished boxes — and are not intended to provide for the distribution and storage system beyond the transportation segment.1.2.1 The attribute levels contained herein are based on U.S. practice and specifications. Some attributes such as flute dimensions and basis weights may be defined differently in other countries.1.3 There are four common methods used for specifying boxes.1.3.1 A common approach is to examine boxes currently in use for the specific application and to make a similar or modified version of that box, given that it has a proven performance record. This method, while quite efficient, and fast, does not lead to box optimization based on characterization by end use. This method can lead to overdesign.1.3.2 A second common approach is to estimate the compression strength necessary for a box at the bottom of a stack of boxes to totally support the anticipated load. A safety factor, F, is calculated from the expected environmental hazards that are anticipated in storage and shipping. A minimum initial box compression, as measured by Test Method D642 is determined using the weight on the bottom box and the F factor, see 8.3. Then engineering principles are used to select material combinations based on material characteristics such as caliper, edge crush value, and flat crush to meet that requirement.1.3.3 The third approach may be used when the box application has product support sufficient to meet anticipated compression requirements, therefore the board structural requirements are focused on protection and containment. Mullen burst values can be one of these measures for this category of box if the user has determined that a minimum burst value is the main metric required in their distribution system. In this case, total weight per box allowable per carrier rules may be higher than would be expected based on expected predicted compression strength, safety factor, and board combination used. See 7.2 – 7.2.2.2 and 8.2.1.1.3.4 The fourth approach may be used when the box is intended for single parcel shipment of high value or hazardous materials, where there can be a compression requirement but most often the performance attributes required are toughness as measured by drop and impact resistance, see 8.2. A means of gaining confidence that a box in this category will function properly in its intended distribution environment is to test the box using some sort of rough handling performance protocol such as Practice D4169 or ISTA 3 Series: General Simulation Performance Tests.1.3.5 Using material specifications to define a box does not guarantee the box will be well made. For example, the best possible material could be used for making a box, but if the score lines are too deep or too shallow, or if the manufacturer’s joint is not secured correctly, the box will fail in distribution. All proposed constructions and designs should be vetted by means of a process of samples, testing, prototype packing and shipping. Only once a construction has been proven to work across a range of anticipated end use conditions should it be approved for normal production.1.4 Corrugated containers for packaging of hazardous materials for transportation shall comply with federal regulations administered by the U.S. Department of Transportation (Code of Federal Regulations, Title 49).1.5 Lists and Descriptions of Performance and Material Characteristics and Related Test Procedures—For further information on the development of performance-based specifications, please refer to the sections on Specifications and Test Procedures of the Fibre Box Handbook.1.6 The values stated in both SI and inch-pound units are to be regarded separately as standard. Within the text, the inch-pound units are shown in brackets. The values stated in each system are not exact equivalents; therefore, each system shall be used independently of the other.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 procedures and test methods for the production of dry cast concrete, defined as very low slump or zero-slump concrete that requires continuous and intense vibration, or mechanical means, or a combination of vibration and mechanical means to consolidate the concrete, enabling immediate removal of the forms from the product. The placement, consolidation, curing, or protection of the concrete are not covered by this specification. The aggregates shall be sized, graded, proportioned, and mixed with such proportions of cementitious material, water, and admixtures, if any, to produce a thoroughly mixed concrete of such quality that the precast product will conform to the test and design requirements of the relevant specification. Materials covered by this specification are the following: cementitious materials (cement, slag cement, fly ash), allowable combinations of cementitious materials, aggregates, and admixtures and blends.This specification also covers weigh batching and mixing, volumetric batching and continuous mixing, reporting, and strength of the specimen.1.1 This specification covers the production of dry cast concrete as defined in 3.2.1. Requirements for quality of concrete shall be as hereinafter specified. This specification does not cover the placement, consolidation, curing, or protection of the concrete.1.2 The values stated in inch-pound units are to be regarded as standard. No other units of measurement are included in this standard.1.3 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.1.4 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

AbstractThese test methods cover production and acceptance tests for concrete pipes, manhole sections, and tiles. Tests include procedures for evaluating external load crushing strength, flat slab top, core strength, absorption, hydrostatic, permeability, manhole step, cylinder, gasket lubricant, joint shear, alkalinity, and gasket measurements. Aside from the procedures, this standard also details the significance and use of and the required test apparatus for each test.1.1 These test methods cover testing of concrete pipe, concrete box sections, manhole sections, and tile. The test methods described are used in production testing and acceptance testing to evaluate the properties provided for in the specifications.1.2 The test methods appear in the following order:  SectionExternal Load Crushing Strength 4Flat Slab Top 5Base Section Test Method 6Core Strength 7Absorption 8Hydrostatic 9Permeability 10Manhole Step 11Cylinder Strength 12Gasket Lubricant 13Joint Shear 14Alkalinity 15Gasket Measurements 16Off-Center Hydrostatic Joint Test 17Hydrostatic External Joint Test Method 18Welded Splice Pull Test 191.3 The test specimens shall not have been exposed to a temperature below 40°F for the 24 h immediately preceding the test.1.4 If any test specimen fails because of mechanical reasons such as failure of testing equipment or improper specimen preparation, it shall be discarded and another specimen taken.1.5 Specimens shall be selected in accordance with the specifications for the type of pipe or tile being tested.1.6 A complete metric companion to Test Methods C497 has been developed—C497M; therefore, no metric equivalents are presented in these methods.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

AbstractThese test methods cover production and acceptance tests for concrete pipes, manhole sections, and tiles. Tests include procedures for evaluating external load crushing strength, flat slab top, core strength, absorption, hydrostatic, permeability, manhole step, cylinder, gasket lubricant, joint shear, alkalinity, and gasket measurements. Aside from the procedures, this standard also details the significance and use of and the required test apparatus for each test.1.1 These test methods cover testing of concrete pipe, concrete box sections, manhole sections, and tile. The test methods described are used in production testing and acceptance testing to evaluate the properties provided for in the specifications.1.2 The test methods appear in the following order:  SectionExternal Load Crushing Strength 4Flat Slab Top 5Base Section Test 6Core Strength 7Absorption 8Hydrostatic 9Permeability 10Manhole Step 11Cylinder 12Gasket Lubricant 13Joint Shear 14Alkalinity 15Gasket Measurements 16Off-Center Hydrostatic Joint Test 17Hydrostatic External Joint Test Method 18Welded Splice Pull Test 191.3 The test specimens shall not have been exposed to a temperature below 4°C for the 24 h immediately preceding the test.1.4 If any test specimen fails because of mechanical reasons such as failure of testing equipment or improper specimen preparation, it shall be discarded and another specimen taken.1.5 Specimens shall be selected in accordance with the specifications for the type of pipe or tile being tested.1.6 These methods are the metric companion of Test Methods C497.1.7 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 single-cell precast reinforced concrete box sections cast monolithically and intended to be used for the construction of culverts and for the conveyance of storm water, industrial wastes and sewage. The reinforced concrete shall consist of cementitious materials, mineral aggregates and water, in which steel has been embedded in such a manner that the steel and concrete act together. The precast reinforced concrete box sections shall be produced with tongue and groove ends. The box section shall be cured using any of the following methods or combinations thereof: steam curing; water curing; and membrane curing. Compression tests for determining concrete compressive strength shall be allowed to be made on either standard rodded concrete cylinders or concrete cylinders compacted and cured in like manner as the box sections, or on cores drilled from the box section.1.1 This specification covers single-cell precast reinforced concrete box sections cast monolithically and intended to be used for the construction of culverts and for the conveyance of storm water, industrial wastes and sewage.NOTE 1: This specification is primarily a manufacturing and purchasing specification. However, standard designs per the AASHTO LRFD Bridge Design Specifications are included and the criteria used to develop these designs are given in Appendix X1. The successful performance of this product depends upon the proper selection of the box section, bedding, backfill, and care that the installation conforms to the construction specifications. The purchaser of the precast reinforced concrete box sections specified herein is cautioned that proper correlation of the loading conditions and the field requirements with the box section specified, and provision for inspection at the construction site, are required.1.2 The values stated in inch-pound units are to be regarded as standard. No other units of measurement are included in this standard.1.3 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： 843元 / 折扣价： 717 元 加购物车