1.1 本规程涉及与承重玻璃走道、玻璃踏板和由夹层玻璃建造的玻璃平台相关的元件。本标准包括性能、设计和安全行为考虑。它解决了玻璃和夹层玻璃特有的特性。所有走道常见的问题，如防滑性，在现有参考标准中进行了说明。 1.2 本规程不涉及由单片玻璃、玻璃块、中空玻璃单元、直接粘结到非玻璃结构基板的玻璃砖或用于支持车辆交通的玻璃走道构成的玻璃走道。 1.3 以国际单位制或英寸-磅单位表示的数值应单独视为标准值。每个系统中规定的值可能不是精确的等效值；因此，每个系统应相互独立使用。将两个系统的值合并可能会导致不符合标准。 1.4 本标准并非旨在解决与其使用相关的所有安全问题（如有）。本标准的用户有责任在使用前制定适当的安全和健康实践，并确定监管限制的适用性。 1.5 本国际标准是根据世界贸易组织技术性贸易壁垒（TBT）委员会发布的《关于制定国际标准、指南和建议的原则的决定》中确立的国际公认标准化原则制定的。 ====意义和用途====== 4.1 玻璃是一种脆性材料，与用作人行道表面的其他固体材料相比，具有不同的随时间和温度变化的特性。因此，玻璃类型是设计和建造夹层玻璃制成的玻璃踏板和玻璃平台的重要考虑因素。 4.2 在设计玻璃走道系统时，破碎后的玻璃保留是一个重要的考虑因素，可将绊倒、切割/刺穿伤害、玻璃坠落或沉降降到最低。 4.3 结构设计应由持有执照的专业设计人员根据第节的规定通过计算进行确认 5. . 4.4 如果需要测试（参见 4.4.1 – 4.4.3 )为了验证玻璃走道的玻璃破损后行为，测试应符合第 6. . 4.4.1 对于具有两层玻璃的层压板，需要进行验证测试。 4.4.2 对于具有两个以上玻璃层的层压板，如果计算按照 4.3 证明玻璃组件具有足够的强度，能够在任何一块玻璃板断裂的情况下承受全部设计载荷。 4.4.3 当通过计算验证破坏后行为时，允许玻璃应力为10 最小负载持续时间符合 表1 应用于所有负载情况。 表1标称负载条件下的容许玻璃应力 注1: 除非制造商另有规定，否则建议破坏性表面处理（例如喷砂）的容许应力折减系数为0.5。一些酸蚀或图案玻璃可能需要玻璃应力折减系数； 咨询制造商。 注2: 从实践中得出的价值观 E1300 ，表X9.1（接缝边缘），使用惯例计算荷载持续时间 E1300 ，等式X7.1，使用 n = 16对于退火玻璃， n = 32用于热强化玻璃，以及 n = 48用于钢化玻璃。 玻璃类型 3秒 兆帕[磅/平方英寸] 10分钟 兆帕[磅/平方英寸] 60分钟 兆帕[磅/平方英寸] 永久的 兆帕[磅/平方英寸] 退火 18.3 [2650] 13.2 [1902] 11.7 [1701] 5.7 [827] 热强化 36.5 [5300] 30.9 [4482] 29.2 [4235] 20.3 [2944] 缓和的 73.0 [10 600] 65.3 [9471] 63.0 [9137] 49.4 [7165] 4.5 玻璃走道系统的制造商或设计师应提供其系统的安装方向、制造和安装公差。 4.6 玻璃破碎后，玻璃走道系统的结构完整性应足以支撑任何一层玻璃破碎后的设计荷载。如果发生任何类型的损坏，应封锁走道，并检查安装情况，以确保系统的结构完整性和行人安全。

1.1 This practice addresses elements related to load-bearing glass walkways, glass treads, and glass landings constructed with laminated glass. This standard includes performance, design, and safe behavior considerations. It addresses the characteristics unique to glass and laminated glass. Issues that are common to all walkways, such as slip resistance, are addressed in existing referenced standards. 1.2 This practice does not address glass walkways constructed with monolithic glass, glass block, insulating glass units, glass tiles that are directly bonded to a non-glass structural substrate, or glass walkways intended to support vehicular traffic. 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 and health 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. ====== Significance And Use ====== 4.1 Glass is a brittle material with different time and temperature-dependent properties than other solid materials used as walkways surfaces. Therefore, the type of glass is an important consideration in the design and construction of glass treads and glass landings constructed with laminated glass. 4.2 Post-breakage glass retention is an important consideration in the design of a glass walkway system as a means of minimizing tripping, cutting/piercing injuries, or fall-through or fallout of the glass. 4.3 The structural design shall be confirmed by calculations by a licensed design professional in accordance with Section 5 . 4.4 If testing is required (see 4.4.1 – 4.4.3 ) to verify post-glass breakage behavior of the glass walkway, the testing shall be in accordance with Section 6 . 4.4.1 For laminates with two glass plies, verification testing is required. 4.4.2 For laminates with more than two glass plies, verification testing is not required provided that calculations completed in accordance with 4.3 demonstrate that the glass assembly has sufficient strength to sustain the full design load with any one glass ply broken. 4.4.3 When verifying post-breakage behavior by calculation, allowable glass stress for 10 min load duration in accordance with Table 1 shall be used for all load cases. TABLE 1 Allowable Glass Stresses for Nominal Load Conditions Note 1: An allowable stress reduction factor of 0.5 is recommended for disruptive surface treatments, for example, sandblasting, unless otherwise provided by the manufacturer. A glass stress reduction factor may be required for some acid etched or patterned glasses; consult the manufacturer. Note 2: Values derived from Practice E1300 , Table X9.1 (seamed edges), factored for load duration using Practice E1300 , Equation X7.1, using n = 16 for annealed glass, n = 32 for heat strengthened glass, and n = 48 for tempered glass. Glass Type 3-sec MPa [psi] 10-min MPa [psi] 60-min MPa [psi] Permanent MPa [psi] Annealed 18.3 [2650] 13.2 [1902] 11.7 [1701] 5.7 [827] Heat-strengthened 36.5 [5300] 30.9 [4482] 29.2 [4235] 20.3 [2944] Tempered 73.0 [10 600] 65.3 [9471] 63.0 [9137] 49.4 [7165] 4.5 The manufacturer or designer of glass walkway systems shall provide installation directions and fabrication and installation tolerances of their systems. 4.6 The structural integrity of the glass walkway system after glass breakage shall be sufficient to support the design loads after any one glass ply is broken. If damage of any kind occurs, the walkway shall be cordoned off and the installation shall be inspected to ensure structural integrity and pedestrian safety of the system.